comptroller treasury maryland wynne et argued november decided may maryland personal income tax state residents consists state income tax md code ann county income tax residents pay income tax another jurisdiction income earned jurisdiction allowed credit state tax county tax nonresidents earn income sources within maryland must pay state income tax nonresidents subject county tax must pay special nonresident tax lieu county tax respondents maryland residents earned income subchapter corporation earned income several respondents claimed income tax credit maryland income tax return taxes paid state comptroller treasury petitioner allowed respondents credit state income tax county income tax assessed tax deficiency decision affirmed hearings appeals section comptroller office maryland tax circuit howard county reversed ground maryland tax system violated commerce clause federal constitution appeals maryland affirmed held tax unconstitutionally discriminated interstate commerce held maryland personal income tax scheme violates dormant commerce clause pp commerce clause grants congress power regulate commerce among several art cl also negative command known dormant commerce clause oklahoma tax jefferson lines precludes discriminat ing transactions basis interstate element boston stock exchange state tax thus inter alia state may tax transaction incident heavily crosses state lines occurs entirely within state armco hardesty impose tax discriminates interstate commerce either providing direct commercial advantage local business subjecting interstate commerce burden taxation northwestern portland cement minnesota pp result case dictated dormant commerce clause cases particularly adams mfg storen gwin white prince henneford central greyhound lines mealey invalidated state tax schemes might lead double taxation income discriminated favor intrastate interstate economic activity pp conclusion affected fact three cases involved tax gross receipts rather net income tax corporations rather individuals decisions previously rejected formal distinction gross receipts net income taxes reason dormant commerce clause treat individuals less favorably corporations addition taxes invalidated adams gwin white applied income individuals corporations right individual vote political elections justify disparate treatment corporate personal income thus previously entertained even sustained dormant commerce clause challenges individual residents state imposed alleged burden interstate commerce see department revenue davis granholm heald pp maryland tax scheme immune dormant commerce clause scrutiny simply maryland jurisdictional power due process clause impose tax hile state may consistent due process clause authority tax particular taxpayer imposition tax may nonetheless violate commerce clause quill north dakota pp maryland income tax scheme discriminates interstate commerce internal consistency test helps courts identify tax schemes discriminate interstate commerce every state tax structure maryland income tax scheme fails internal consistency test every state adopted maryland tax structure interstate commerce taxed higher rate intrastate commerce maryland tax scheme inherently discriminatory operates tariff fatal tariffs paradigmatic example law discriminating interstate commerce west lynn creamery healy petitioner emphasizes offering residents earn income interstate commerce credit state portion income tax maryland actually receives less tax revenue residents earn income interstate commerce rather intrastate commerce argument red herring critical point total tax burden interstate commerce higher pp md affirmed alito delivered opinion roberts kennedy breyer sotomayor joined scalia filed dissenting opinion thomas joined parts ii thomas filed dissenting opinion scalia joined except first paragraph ginsburg filed dissenting opinion scalia kagan joined opinion notice opinion subject formal revision publication preliminary print reports readers requested notify reporter decisions washington typographical formal errors order corrections may made preliminary print goes press comptroller treasury maryland petitioner brian wynne et ux writ certiorari appeals maryland may justice alito delivered opinion case involves constitutionality unusual feature maryland personal income tax scheme like many maryland taxes income residents earn within outside state well income nonresidents earn sources within maryland unlike maryland offer residents full credit income taxes pay effect scheme income earned maryland residents outside state taxed twice maryland scheme creates incentive taxpayers opt intrastate rather interstate economic activity long held subject corporate income tax schemes similar maryland see reason income earned individuals treated less favorably maryland admits law economic effect state tariff quintessential evil targeted dormant commerce clause therefore affirm decision maryland highest hold feature state tax scheme federal constitution maryland like raises revenue part levying personal income tax income tax maryland imposes upon residents two parts state income tax set graduated rate md code ann supp county income tax set rate varies county capped despite names maryland assigned taxes state taxes collected state comptroller treasury frey comptroller treasury md course maryland residents earn income also tax income maryland residents pay income tax another jurisdiction income earned maryland allows credit state tax county tax md case result part income maryland resident earns outside state may taxed twice maryland also taxes income nonresidents tax two parts first nonresidents must pay state income tax income earn sources within maryland supp second nonresidents subject county tax must pay special nonresident tax lieu county tax frey supra special nonresident tax levied income earned sources within maryland rate equal lowest county income tax rate set maryland county maryland tax income nonresidents earn sources outside maryland see respondents brian karen wynne maryland residents relevant tax year brian wynne owned stock maxim healthcare services subchapter year maxim earned income maryland filed state income tax returns wynnes earned income passed maxim tax return wynnes claimed income tax credit income taxes paid petitioner maryland state comptroller treasury denied claim assessed tax deficiency accordance maryland law comptroller allowed wynnes credit maryland state income tax county income tax hearings appeals section comptroller office slightly modified assessment otherwise affirmed maryland tax also affirmed circuit howard county reversed ground maryland tax system violated commerce clause appeals maryland affirmed md evaluated tax test complete auto transit brady asks whether tax applied activity substantial nexus taxing state fairly apportioned discriminate interstate commerce fairly related services provided state appeals held tax failed fair apportionment nondiscrimination parts complete auto test respect fair apportionment first held tax failed internal consistency test every state adopted maryland tax scheme interstate commerce taxed higher rate intrastate commerce held tax failed external consistency test created risk multiple taxation respect nondiscrimination held tax discriminated interstate commerce denied residents credit income taxes paid taxed income earned interstate rate higher income earned intrastate thus concluded maryland tax scheme unconstitutional insofar denied wynnes credit county tax income taxes paid two judges dissented argued tax violate commerce clause appeals later issued brief clarification state may avoid discrimination interstate commerce providing tax credit method apportionment avoid discriminating interstate commerce violation dormant commerce clause granted certiorari ii commerce clause grants congress power regulate commerce among several art cl simple words reflected central concern framers immediate reason calling constitutional convention conviction order succeed new union avoid tendencies toward economic balkanization plagued relations among colonies later among articles confederation hughes oklahoma although clause framed positive grant power congress consistently held language contain negative command known dormant commerce clause prohibiting certain state taxation even congress failed legislate subject oklahoma tax jefferson lines interpretation commerce clause disputed see camps town harrison thomas dissenting tyler pipe industries washington state dept revenue scalia concurring part dissenting part license cases taney also deep roots see case state freight tax wall cooley board wardens port philadelphia ex rel soc relief distressed pilots gibbons ogden wheat marshall prohibiting discriminating imposing excessive burdens interstate commerce without congressional approval strikes one chief evils led adoption constitution namely state tariffs laws burdened interstate commerce fulton faulkner hughes supra welton missouri see also federalist nos hamilton madison precedents dormant commerce clause precludes discriminat ing transactions basis interstate element boston stock exchange state tax means among things state may tax transaction incident heavily crosses state lines occurs entirely within state armco hardesty may state impose tax discriminates interstate commerce either providing direct commercial advantage local business subjecting interstate commerce burden taxation northwestern portland cement minnesota citations omitted existing dormant commerce clause cases dictate result reached case maryland highest three cases involving taxation income domestic corporations particularly instructive adams mfg storen indiana taxed income every indiana resident including individuals income every nonresident derived sources within indiana state levied tax income earned plaintiff indiana corporation sales made state holding scheme violated dormant commerce clause explained vice statute taxed without apportionment receipts derived activities interstate commerce receipts also taxed sales occurred warned interstate commerce subjected risk double tax burden intrastate commerce exposed commerce clause forbids ibid next year gwin white prince henneford reached similar result case state washington taxed income persons business state washington levied tax income plaintiff washington corporation earned shipping fruit washington foreign countries tax wrote discriminates interstate commerce since imposes upon merely interstate commerce done risk multiple burden local commerce exposed third cases involving taxation domestic corporation central greyhound lines mealey new york sought tax portion domiciliary bus company gross receipts derived services provided neighboring see also murphy dissenting stating plaintiff new york corporation noting might also attempt tax portion company gross receipts held new york scheme violated dormant commerce clause imposed unfair burden interstate commerce majority opinion three cases struck state tax scheme might resulted double taxation income earned state discriminated favor intrastate interstate economic activity explain see part infra maryland tax scheme unconstitutional similar reasons principal dissent distinguishes cases sole ground involved tax gross receipts rather net income see reason distinction gross receipts net income matter particularly light admonition must consider formal language tax statute rather practical effect complete auto principal dissent claims post opinion ginsburg historically taken position difference taxes net income taxes gross receipts interstate commerce warrants different results trost hartman federal limitations state local taxation emphasis added hereinafter trost historical point irrelevant principal dissent seems acknowledge cases rejected formal distinction time ago distinction gross receipts net income taxes basis decisions adams gwin white central greyhound turned instead threat multiple taxation discarded distinction taxes gross receipts net income based notion endorsed early cases tax gross receipts impermissible direct immediate burden interstate commerce whereas tax net income merely indirect incidental burden glue town oak creek see also shaffer carter arid distinction direct indirect burdens allowed little coherent trustworthy guidance tax validity trost beginning justice stone seminal opinion western live stock bureau revenue continuing cases like adams gwin white burdens test replaced practical approach looked economic impact tax cases worked substantial judicial reinterpretation power levy taxes gross income interstate commerce trost temporary reversion earlier formalism see spector motor service gross receipts judicial pendulum swung wide arc recently reaching place taxation gross receipts interstate commerce placed equal footing receipts local business complete auto transit brady trost squarely rejected argument commerce clause distinguishes taxes net gross income see jefferson lines explaining central greyhound understood gross receipts tax simply variety tax income moorman mfg bair rejecting suggestion commerce clause distinguishes gross receipts taxes net income taxes brennan dissenting agree purposes constitutional review distinction corporate income tax tax complete auto supra upholding gross receipts tax rejecting notion commerce clause places blanket prohibition state taxation imposed directly interstate transaction part petitioner distinguishes adams gwin white central greyhound ground concerned taxation corporations individuals hard see dormant commerce clause treat individuals less favorably corporations see camps newfound tax real estate like tax may impermissibly burden interstate commerce emphasis added addition distinction individuals corporations stand taxes invalidated adams gwin white applied income individuals corporations see ind stat ch burns tax adams sess laws ch tit ii pp tax gwin white attempting explain dormant commerce clause provide less protection natural persons corporations petitioner solicitor general argue free hand tax residents income provide residents many services solicitor general puts individuals reap benefits local roads local police fire protection local public schools local health welfare benefits brief amicus curiae argument fails corporations also benefit heavily state local services trucks hauling corporation supplies goods vehicles transporting employees use local roads corporations call upon local police fire departments protect facilities corporations rely local schools educate prospective employees availability good schools government services features may aid corporation attracting retaining employees thus disparate treatment corporate personal income justified based state services enjoyed two groups taxpayers sole remaining attribute view petitioner distinguishes corporation individual present purposes right individual vote principal dissent also emphasizes residents vote change maryland discriminatory tax law post argument need concerned state laws burden interstate activities individuals individuals lobby vote legislators support measures state tax unconstitutionally discriminates interstate commerce invalid regardless whether plaintiff resident voter nonresident state thus entertained even sustained dormant commerce clause challenges individual residents state imposed alleged burden interstate commerce department revenue davis granholm heald also sustained challenge tax whose burden borne consumers bacchus imports dias principal dissent justice scalia respond holdings relying dictum goldberg sweet purpose dormant commerce clause protect state residents state taxes post ginsburg dissenting post scalia dissenting repudiated dictum west lynn creamery healy stated tate taxes ordinarily paid businesses consumers yet discriminate products unconstitutional course dictum must bow holdings many cases entertaining commerce clause challenges brought residents find dissents reliance goldberg dictum particularly inappropriate since find similarly bound rule case applied internal consistency test determine whether tax issue violated dormant commerce clause addition notion victims discrimination complete remedy polls fanciful likely distinct minority state residents earns income state schemes discriminate income earned may attractive legislators majority constituents precisely reason even farfetched suggest natural persons income better able influence state lawmakers large corporations headquartered state short petitioner argument leave security majority voters prefer protectionism expense earn income interstate particularly incongruous present case disregard prior decisions regarding taxation corporate income income issue type corporate income namely income subchapter corporation small businesses may incorporate subchapter thus acceptance petitioner submission provide greater protection income earned large subchapter corporations small businesses incorporated subchapter attempting justify maryland unusual tax scheme principal dissent argues commerce clause imposes limit maryland ability tax income residents matter income earned argues maryland sovereign power tax income residents wherever earned reasons dormant commerce clause constrain maryland ability expose residents nonresidents threat double taxation argument confuses state may without violating due process clause fourteenth amendment may without violating commerce clause due process clause allows state tax income residents even income earned outside taxing jurisdiction oklahoma tax chickasaw nation state may consistent due process clause authority tax particular taxpayer imposition tax may nonetheless violate commerce clause quill north dakota rejecting due process challenge tax sustaining commerce clause challenge tax decision camps newfound illustrates point held commerce clause prohibited maine granting favorable tax treatment charities operated principally benefit maine residents plaintiff charity case maine nonprofit corporation question maine raw jurisdictional power tax charity see chickasaw nation supra nonetheless tax failed scrutiny commerce clause camps newfound supra similarly maryland raw power tax residents income insulate tax scheme scrutiny dormant commerce clause although principal dissent claims mantle precedent unable identify single case endorses essential premise namely commerce clause places constraint state power tax income residents wherever earned unsurprising cases like quill camps newfound recognize fact state jurisdictional power impose tax says nothing whether tax violates commerce clause see also barclays bank plc franchise tax bd separately addressing due process commerce clause challenges tax moorman standard pressed steel department revenue lawrence state tax separately addressing due process equal protection challenges tax travis yale towne mfg separately addressing due process challenges tax one good reason never accepted principal dissent logic lead plainly untenable results imagine maryland taxed income residents earned exempted income earned state business primarily served maryland residents tax violate dormant commerce clause see camps newfound supra saved principal dissent admonition maryland power tax income residents principled difference hypothetical commerce clause challenge one principal dissent accepted work sea change commerce clause jurisprudence legion cases considered even upheld dormant commerce clause challenges brought residents taxes state jurisdictional power impose see davis camps newfound fulton bacchus imports central greyhound gwin white adams principal dissent prevail cases thrown doubt cases state decision tax way allegedly discriminates interstate commerce justified argument state may tax residents without commerce clause constraints principal dissent claims departing principles accepted century repeatedly acknowledged see post comes providing supporting authority assertion cites exactly two commerce clause decisions supposedly inconsistent decision today one summary affirmance west publishing mccolgan neither actually supports principal dissent argument first cases shaffer carter resident illinois earned income oil oklahoma unsuccessfully argued oklahoma income tax assessment violated several provisions federal constitution main argument based due process also raised dormant commerce clause challenge although principal dissent relies shaffer proposition state may tax income residents wherever earned shaffer reject commerce clause challenge basis dormant commerce clause challenge shaffer nothing like wynnes challenge taxpayer shaffer argued tax considered excise tax business rather income tax proper unconstitutionally burdened interstate commerce brief appellant taxpayer argue burden occurred subject double taxation instead argued tax impermissible direct tax interstate business ibid argument based notion may impose tax directly interstate commerce see supra assuming taxpayer business engaged interstate commerce held sufficient say tax imposed upon gross receipts upon net proceeds plainly sustainable even includes net gains interstate commerce glue town oak creek shaffer supra citation omitted shaffer thus adjudicate anything like double taxation argument accepted later cases us today principal dissent suggestion shaffer allows levy discriminatory net income taxes refuted case decided day travis connecticut corporation challenged new york net income tax allowed residents nonresidents certain tax exemptions first rejected taxpayer due process argument settled decision shaffer due process inquiry end matter separately considered sustained argument net income tax disparate treatment residents nonresidents violated privileges immunities clause second case principal dissent relies west publishing summary affirmance thus considerably less precedential value opinion merits illinois bd elections socialist workers party summary affirmance read renunciation doctrines previously announced opinions full argument mandel bradley per curiam quoting fusari steinberg burger concurring principal dissent reliance decision case particularly inappropriate summary affirmance affirmance judgment rationale affirmance may gleaned solely opinion moreover disagree result west publishing tax case levied net income every corporation derived sources within state thus internally consistent nondiscriminatory tax scheme see west publishing mccolgan cal emphasis added moreover even disagree result citation summary affirmance glue suggests decision based distinction net income gross receipts taxes west publishing indeed repudiate double taxation cases upon rely principal dissent also finds significant first enacted modern income taxes early tax schemes similar maryland practice however means universal great many alabama colorado georgia kentucky maryland early income tax schemes allowed residents credit taxes paid see code tit ch stat ch cum supp code ann carroll stat ch art xx baldwin rev md ann code art ch also adopted internally consistent tax schemes example massachusetts utah taxed income residents nonresidents see mass laws ch utah rev stat et seq event hardly surprising early state ventures taxation income included protectionist regimes favored local economy interstate commerce much significant next century commerce clause developed almost entirely abandoned approach perhaps recognition doubtful constitutionality today state practice provide credits personal income taxes taxes paid see hellerstein hellerstein state taxation pp ed previously noted tax schemes held unconstitutional adams gwin white central greyhound potential result discriminatory double taxation income earned state created powerful incentive engage intrastate rather interstate economic activity although use term cases held schemes cured taxes satisfy subsequently labeled internal consistency test see jefferson lines citing gwin white case requiring internal consistency see also trost explaining internal consistency test origins western live stock adams gwin white test helps courts identify tax schemes discriminate interstate commerce looks structure tax issue see whether identical application every state union place interstate commerce disadvantage compared commerce intrastate see also tyler pipe armco container america franchise tax hypothetically assuming every state tax structure internal consistency test allows courts isolate effect defendant state tax scheme virtue test allows courts distinguish tax schemes inherently discriminate interstate commerce without regard tax policies tax schemes create disparate incentives engage interstate commerce sometimes result double taxation result interaction two different nondiscriminatory internally consistent schemes see armco supra moorman brief tax economists amici curiae hereinafter brief tax economists brief michael knoll ruth mason amici curiae hereinafter brief knoll mason first category taxes typically unconstitutional second see armco supra moorman supra tax schemes fail internal consistency test fall first category second ny tax disadvantage remains application test due tax disparities instead attributable taxing state discriminatory policies alone neither petitioner principal dissent questions economic bona fides internal consistency test despite professed adherence precedent principal dissent ignores numerous cases applied internal consistency test past internal consistency test formally introduced three decades ago see container supra invoked fewer seven cases invalidating tax three cases see american trucking michigan pub serv jefferson lines goldberg american trucking scheiner tyler pipe armco container supra maryland income tax scheme fails internal consistency simple example illustrates point assume every state imposed following taxes similar maryland county special nonresident taxes tax income residents earn state tax income residents earn jurisdictions tax income nonresidents earn state assume two taxpayers april bob live state april earns income state whereas bob earns income state circumstance bob pay income tax april solely earns income interstate specifically april pay tax state bob pay tax twice state resides state earns income critically dispels central argument made petitioner principal dissent maryland scheme discriminatory treatment interstate commerce simply result interaction taxing schemes instead internal consistency test reveals undisputed economic analysis shows maryland tax scheme inherently discriminatory operates tariff see brief tax economists brief knoll mason identity maryland tax tariff fatal tariffs paradigmatic example law discriminating interstate commerce west lynn indeed asked foregoing analysis made amici tax economists knoll mason counsel maryland responded dispute mathematics lose switch tariffs income taxes tr oral arg maryland offered reason analysis change deal income tax rather formal tariff see none tariffs products patently unconstitutional cases reveal single attempt state enact one instead cases filled state laws aspire reap benefits tariffs means west lynn supra none dissenting colleagues dispute economic analysis principal dissent focuses instead supposed oddity analysis principal dissent envision tax schemes result double taxation violate internal consistency test happen principal dissent points state taxed based residence state taxed based source post ginsburg dissenting see also post scalia dissenting prior decisions already considered rejected precise argument good reason example armco struck internally inconsistent tax posed risk double taxation even though recognized might permissible arrangements result double taxation schemes constitutional explained result arise impermissible discrimination interstate commerce principal dissent protest distinction entirely circular post misunderstands critical distinction recognized cases like armco discriminatory tax schemes double taxation results interaction two different nondiscriminatory tax schemes see also moorman distinguishing potential consequences use different formulas two prohibited commerce clause discrimination inhere either state formula prohibited petitioner solicitor general argue maryland tax neutral discriminatory tax applies three categories income specifically point tax levied residents earn income state residents earn income state nonresidents earn income state fact tax might advantage appearing nondiscriminatory save invalidation tyler pipe quoting general motors washington goldberg dissenting see also american trucking scheiner dormant commerce clause applies state taxes even allocate tax burdens insiders outsiders manner facially discriminatory maine taylor state law may discriminate interstate commerce face practical quoting hughes case internal consistency test economic analysis indeed petitioner concession confirm tax scheme operates tariff discriminates interstate commerce scheme invalid petitioner principal dissent post also note offering residents earn income interstate commerce credit state portion income tax maryland actually receives less tax revenue residents earn income interstate commerce rather intrastate commerce argument red herring critical point total tax burden interstate commerce higher maryland may receive less tax revenue particular taxpayer see armco supra maryland tax unconstitutionally discriminates interstate commerce thus invalid regardless much particular taxpayer must pay taxing state simple hypothetical illustrates point assume state imposes tax income residents earn tax income earn jurisdictions assume also state happens grant credit income taxes paid scheme discriminates interstate commerce taxes income earned interstate higher rate income earned intrastate despite fact certain circumstances resident state earns income interstate may pay less tax state neighbor earns income intrastate example bob lives state earns income state income tax rate bob pay total tax income though go state credit go state bob thus pay less state neighbor april lives state earns income april pay tax state bob tax burden state irrelevant total tax burden matters principal dissent left two arguments internal consistency test arguments inconsistent precedents first principal dissent claims analysis outlined requires state taxing based residence recede state taxing based source post establish rule priority sure maryland remedy infirmity tax scheme offering credit income taxes paid see tyler pipe supra maryland tax scheme survive internal consistency test inherently discriminatory tweak first hypothetical supra assume impose tax three categories income also allow credit income taxes residents pay jurisdictions circumstance april lives works state bob lives state works state pay tax specifically april pay tax state bob pay tax state state give credit tax paid state maryland cure problem current system granting credit taxes paid foreclose possibility comply commerce clause way see brief tax economists brief knoll mason course decide constitutionality hypothetical tax scheme maryland might adopt scheme us maryland existing tax unconstitutionally discriminates interstate commerce enough decide case second principal dissent finds deep flaw possibility maryland eliminate inconsistency tax scheme terminating special nonresident tax measure help wynnes post second objection refutes first positing maryland remedy unconstitutionality tax scheme eliminating special nonresident tax principal dissent accepts maryland desire tax based residence need recede another state desire tax based source moreover principal dissent supposed flaw simply truism every case dormant commerce clause mention equal protection clause whenever government impermissibly treats like cases differently cure violation either leveling leveling whenever state impermissibly taxes interstate commerce higher rate intrastate commerce infirmity cured lowering higher rate raising lower rate combination two reason concluded state found imposed impermissibly discriminatory tax retains flexibility responding determination mckesson division alcoholic beverages tobacco dept business regulation see also associated industries mo lohman fulton every claim suffers flaw succeed dormant commerce clause equal protection claim ever succeed justice scalia uphold constitutionality maryland tax scheme dormant commerce clause words judicial fraud post view gibbons ogden wheat chief justice marshall wrote great force argument commerce clause limits power enact laws regulating interstate commerce since time supposedly fraudulent doctrine applied dozens opinions joined dozens justices perhaps reason petitioner case challenging interpretation application doctrine ask us reconsider doctrine validity justice scalia dispute fact state tariffs among principal problems led adoption constitution see post dispute fact maryland tax scheme tantamount tariff work done state argues however constitution addresses problem state tariffs prohibiting imposing duties imports exports ibid quoting art cl explain interpretation constitution clause lead result reach dormant commerce clause cases noted close relationship two provisions see state tonnage tax cases wall justice thomas also refuses accept dormant commerce clause doctrine suggests constitution ratified understanding prevent state maryland done notes imposed income taxes time adoption constitution observes indication early state income tax schemes provided credits income taxes paid elsewhere post dissenting opinion seems highly implausible writes ratified commerce clause understood conflict income tax laws nonetheless adopted without word concern ibid argument plainly unsound first difficulty interstate travel number individuals earned income state surely small unaware records showing example common workers commute manhattan new jersey rowboat connecticut stagecoach second justice thomas shown small number individuals earned income state taxed twice income number income tax schemes appear taxed income residents nonresidents example report congress direct taxes oliver wolcott secretary treasury describes delaware income tax imposed inhabitants state makes mention taxation nonresidents income report sess concerning direct taxes american state papers finance justice thomas likewise understands massachusetts delaware income taxes imposed residents post tax schemes course pass internal consistency test moreover difficulty administering income tax nonresidents diminished likelihood double taxation see blakey state income taxation third even persons taxed twice unlikely matter common knowledge must known delegates state ratifying conventions voted adopt constitution reasons judgment appeals maryland affirmed ordered scalia dissenting comptroller treasury maryland petitioner brian wynne et ux writ certiorari appeals maryland may justice scalia justice thomas joins parts ii dissenting holds unconstitutional maryland refusal give residents full credits income taxes paid invoking negative commerce clause rule judges may set aside state laws think impose much burden upon interstate commerce join principal dissent demonstrates incompatibility decision prior negative commerce clause cases post opinion ginsburg incompatibility however test though incompatible cases fortiori fails test well discussed briefly part iii principal purpose writing separately point wrong negative commerce clause jurisprudence first place well today decision illustrates error fundamental problem negative commerce clause cases constitution contain negative commerce clause contains commerce clause unlike negative commerce clause adopted judges real commerce clause adopted people merely empowers congress regulate commerce foreign nations among several indian tribes art cl clause says nothing prohibiting state laws burden commerce much less say anything authorizing judges set aside state laws believe burden commerce clearest sign negative commerce clause judicial fraud utterly illogical holding congressional consent enables enact laws otherwise constitute impermissible burdens upon interstate commerce see prudential ins benjamin congressional consent lift constitutional prohibition see license cases opinion taney efforts justify judicial economic veto come naught claims doctrine deep roots ante like many weeds age alone make brazen invention doctrine event quite old makes seem idea commerce clause force limits state power finds expression discussions surrounding constitution ratification frankfurter commerce clause marshall taney waite years adoption constitution continually made regulations burdened interstate commerce like pilotage laws quarantine laws without provoking doubts constitutionality license cases supra earliest allusions negative commerce clause came dicta ambiguous dicta vigorously contested time see first clear holding setting aside state law negative commerce clause came civil war years constitution adoption case state freight tax wall since tended revamp doctrine every couple decades upon finding existing decisions unworkable unsatisfactory see quill north dakota negative commerce clause applied today little common negative commerce clause century except perhaps incoherence adds tariffs laws burdened interstate commerce among chief evils led adoption constitution ante line reasoning forgets interpretation requires heeding constitution purposes requires heeding means constitution uses achieve purposes constitution addresses evils local impediments commerce prohibiting imposing certain especially burdensome taxes imposts duties imports exports dut ies tonnage without congressional consent art cls also addresses evils giving congress commerce power may prohibit burdensome taxes laws constitution text shows however address evils empowering judiciary set aside state taxes laws deems burdensome arrogating power anyway negative commerce clause cases disrupted balance constitution strikes goal protecting commerce competing goals like preserving local autonomy promoting democratic responsibility ii failings negative commerce clause doctrine go beyond lack constitutional foundation today decision well illustrates one glaring defect negative commerce clause lack governing principle neither constitution legal traditions offer guidance improper state interference commerce permissible state taxation regulation commerce must make rules go along ended bestiary ad hoc tests ad hoc exceptions apply nowadays including substantial nexus test fair apportionment test fair relation test complete auto transit brady exception department revenue davis exception quill supra internal consistency rule invoked nicely showcases ad hocery rule tax violates constitution hypothetical adoption interfere interstate commerce ante exercise counterfactuals find way basic charter test true bears resemblance kant first formulation categorical imperative act according maxim whereby time become universal law without contradiction grounding metaphysics morals ellington transl ed bears resemblance however anything text structure constitution one discern obligation internal consistency legal traditions show imposing internally inconsistent taxes quite recently approval see general motors washington upholding internally inconsistent business activities tax hinson lott wall upholding internally inconsistent liquor tax justification test seems disapproves tax disadvantage created internally inconsistent taxes willing tolerate created interaction internally consistent schemes ante whatever expounding area constitution american trucking smith scalia concurring judgment another conspicuous feature negative commerce clause instability principle anchors development doctrine line wise regulation burdensome interference changes age economic age one never tell make new rule throw away old one change almost doctrine natural state natural state legislation constantly changing national economy ibid today decision continues proud tradition consider ways contradicts earlier decisions earlier case conceded trucking tax fail ed consistency test upheld tax anyway american trucking michigan pub serv proclaims income tax fails internal consistency test reason strikes ante earlier case concluded purpose commerce clause protect state residents state taxes residents complain change tax state political process goldberg sweet concludes negative commerce clause operates regardless whether plaintiff resident nonresident notion residents complete remedy polls fanciful ante earlier case said difference effect tax measured gross receipts one measured net income manifest substantial glue town oak creek says formal distinction taxes net gross income matter ante earlier case upheld tax despite economic similarity tax struck central greyhound lines mealey oklahoma tax jefferson lines explained economic equivalence alone touchstone commerce clause jurisprudence strikes tax part economic similarity tax struck central greyhound ante explains must consider formal language tax statute rather practical effect ante much internal consistency final defect synthetic commerce clause cases incompatibility judicial role doctrine call upon us perform conventional judicial function like interpreting legal text discerning legal tradition even applying stable body precedents instead requires us balance needs commerce needs state governments task legislators judges today enterprise eliminating double taxation puts problem prominently display one sure way eliminate double taxation prescribe uniform national tax rules example allow taxation income earned program prescribing national tax code plainly exceeds judicial competence may even exceed legislative competence come uniform code accounts many political economic differences among alternative consider whether state taxes practice overlap much taxes approach drive us perplexing inquiry unfit judicial department degree taxation legitimate use degree may amount abuse power mcculloch maryland wheat today chooses third approach prohibiting imposing internally inconsistent taxes ante rule avoids double taxation hypothetical world adopt internally consistent tax real world different might adopt different internally consistent taxes example maryland imposes income tax people live maryland regardless work one internally consistent scheme virginia imposes income tax people work virginia regardless live another internally consistent scheme marylanders work virginia still face double taxation post fitting imaginary commerce clause lead imaginary benefits iii reasons stare decisis vote set aside tax negative commerce clause discriminates face interstate commerce distinguished tax already held unconstitutional american trucking scalia concurring judgment income tax us discriminate face interstate commerce resident pays less maryland works maryland works elsewhere neither tax us indistinguishable one previously held unconstitutional contrary principal dissent establishes prior cases validate tax maryland refusal give residents full tax credits income taxes paid disadvantages threatens double taxation encourages residents work maryland maryland law also advantages allows state collect equal revenue taxpayers equal incomes avoids administrative burdens verifying tax payments ensures every resident pays state least income tax nothing constitution precludes maryland deciding benefits tax scheme worth costs respectfully dissent thomas dissenting comptroller treasury maryland petitioner brian wynne et ux writ certiorari appeals maryland may justice thomas justice scalia joins except first paragraph dissenting continue adhere view negative commerce clause basis text constitution makes little sense proved virtually unworkable application consequently serve basis striking state statute mcburney young thomas concurring slip internal quotation marks alteration omitted accord camps town harrison thomas dissenting reason uphold maryland tax scheme reaching contrary conclusion proves far negative commerce clause jurisprudence departed actual commerce clause according majority state income tax fails provide residents full credit income taxes pay violates commerce clause ante news come surprise penned ratified constitution observed time ago income taxes imposed several shortly adoption federal constitution shaffer carter indication early state income tax schemes provided credits income taxes paid elsewhere thus majority reasoning state laws contravened newly ratified commerce clause seems highly implausible ratified commerce clause understood conflict income tax laws nonetheless adopted without word concern silence particularly deafening given importance taxes raising revenues time see kinsman income tax commonwealths publications american economic assn noting example connecticut earliest history followed plan taxing incomes rather property total assessed value taxable incomes connecticut year little internal quotation marks omitted areas constitutional analysis considered laws powerful evidence original understanding constitution relied practices first congress guide interpretation provisions defining congressional power see golan holder slip copyright clause mcculloch maryland wheat necessary proper clause likewise treated actions taken first congress presumptively consistent bill rights town greece galloway alito concurring slip see majority opinion slip carroll looked state laws guide understanding constitution meaning see district columbia heller second amendment atwater lago vista fourth amendment roth first amendment kilbourn thompson speech debate clause see also calder bull dall opinion paterson ex post facto clause even one assumed negative commerce clause existed see reason subject different mode constitutional interpretation majority quibbles fail sho small number individuals earned income state taxed twice income ante given deference owe duly enacted laws state particularly concerning paradigmatically sovereign activity taxation burden proof falls wield federal constitution foreclose exercise sovereign power doubtful majority application one many negative commerce clause tests correct precedents see ante scalia dissenting post ginsburg dissenting certain majority result incorrect constitution well said another area constitutional law inconsistency tests historic practice inconsistency calls question validity test historic practice town greece supra alito concurring slip respectfully dissent ginsburg dissenting comptroller treasury maryland petitioner brian wynne et ux writ certiorari appeals maryland may justice ginsburg justice scalia justice kagan join dissenting today decision veers principle interstate international taxation repeatedly acknowledged nation state may tax income residents even income earned outside taxing jurisdiction oklahoma tax chickasaw nation accord principle regularly rejected claims taxes resident income violate due process clause lack sufficient connection taxing state quill north dakota internal quotation marks omitted see lawrence state tax dormant commerce clause jurisprudence decides state really empowered tax resident income whatever source derived taxing personal income holds authority authority tax commerce conducted within state territory boxes taxing authority taxpayer domicile see nothing constitution prior decisions dictates one two domiciliary state source state must recede simply lawful tax regimes reaching income see moorman mfg bair finding discriminat ion interstate commerce alleged taxation disparities consequence combined effect two otherwise lawful schemes true maryland elected deny credit income taxes paid computing resident county tax liability equally true however taxed wynnes income elected offer credit maryland county income taxes situation constitution prefer one lawful basis state taxation person income require one state case maryland limit taxation state also choose exercise full extent authority often offer residents credits income taxes paid maryland state income tax purposes however matter tax policy chickasaw nation internal quotation marks omitted constitution compels course least century domicile recognized secure ground taxation residents worldwide income lawrence enjoyment privileges residence within state attendant right invoke protection laws explained inseparable responsibility sharing costs government ibid tax measured net income residents equitable method distributing burdens government among privileged enjoy benefits new york ex rel cohn graves given residents state reside elsewhere therefore may demanded approbation long favored residents nonresidents provision local services see reeves stake favoritism violate commerce clause see also martinez bynum upholding residency requirements free primary secondary schooling cost services residents enjoy substantial according state comptroller example maryland local governments spent billion fund public schools billion state health programs billion state food supplemental program programs available residents brief petitioner see also brief amicus curiae howard county wynnes lived budgeted million education fiscal year excluding nonresidents services observed rational residents fund state treasury state created serve reeves taxpayer home state hardly faulted making support local government activities obligation every resident regardless obligations residents may residents moreover possess political means shared outsiders ensure power tax income abused observed purpose commerce clause protect state residents state taxes goldberg sweet reason evident residents insider presumably able complain change tax state political process ibid nonresidents contrast similarly positioned effec legislative change ibid chief justice marshall developer commerce clause jurisprudence reasoned imposing tax legislature acts upon constituents general sufficient security erroneous oppressive taxation mcculloch maryland wheat people state thus res confidently interest legislator influence constituents representative guard abuse right taxing property hardly maintain majority insistently asserts commerce clause places constraint state power tax residents ante see also ante shied away striking closely scrutinizing state efforts tax residents higher rate activities activities exempt taxation activities see department revenue davis camps owatonna town harrison fulton faulkner bacchus imports dias see also ante mistakenly charging analysis cases thrown doubt olitical processes ill equipped guard facially discriminatory taxes effect tax sort mollif interests otherwise lobby west lynn creamery healy contrast generally upheld evenhanded tax es spite adverse effects interstate commerce part existence major interests adversely affected powerful safeguard legislative abuse ibid citing inter alia goldberg justification applies full force evenhanded tax challenged taxes residents income rate whether earned rationales state taxing residents worldwide income diminished another state independent interest requiring contributions nonresidents realize current pecuniary benefits protection state government shaffer carter taxpayer living one state working another gains protection benefits called upon share costs governments deciding whether tax residents entire worldwide income must choose legitimate competing tax policy objectives state might prioritize obtaining equal contributions benefit state protection roughly similar ways state might prioritize ensuring taxpayers subject double taxation state however accomplish objectives illustrate consider wynnes tax scheme place howard county residents earned income otherwise tax profile wynnes million taxable net income owed amount taxes maryland wynnes see app pet cert scheme thus ensured residents similar access state protection benefits similar ability pay made equal contributions state defray costs benefits maryland achieve objective however without exposing wynnes risk double taxation conversely prioritizes reducing risk wynnes income taxed twice two different choice comes cost wynnes enjoyed equal access state services paid less cover costs services similarly situated neighbors earned income entirely within state see pet cert confront deciding whether tax nonresidents entire income state require residents nonresidents work within state protection contribute equally cost protection state seek avoid exposing workers risk double taxation achieve objectives least century responsibility striking right balance two policy objectives belonged congress chosen balance embraces today see ante since almost dawn modern era state income taxation taken approach maryland taxing residents entire income wherever earned time taxing nonresidents entire income recognizing rotection benefit power taxpayer income confined either state residence state income earned long afforded flexibility curry mccanless history imposing upholding income tax schemes materially identical one confronts beginning end case modern era state income taxation dates wisconsin tax enacted see laws ch blakey state income taxation close start modern era taxed residents nonresidents ways materially indistinguishable way maryland example oklahoma began taxing residents entire net income arising accruing sources time taxing nonresidents entire net income sources th state sess laws ch pp emphasis added like maryland today oklahoma provided credit either residents nonresidents taxes paid elsewhere see ch et neighboring missouri adopted similar scheme residents owed taxes entire net income sources nonresidents owed taxes entire net income sources within th state mo laws pp emphasis added missouri provided neither residents nonresidents credit taxes paid see et thus much like maryland today early income tax adopters simultaneously taxed residents income wherever earned nonresidents income earned within almost immediately began issuing became long series decisions repeatedly upholding authority tax residents worldwide income nonresidents income maguire trefry resident income tax shaffer nonresident income tax see also state tax utah aldrich curry guaranty trust virginia graves lawrence end principle interstate international taxation sovereigns authority tax income residents including income earned outside borders chickasaw nation sovereigns generally may also tax nonresidents income earned within sovereign jurisdiction far suggesting must choose taxing residents nonresidents specifically affirmed exact income may taxed state earned state recipient domicile curry emphasis added see also aldrich rejecting rule immunity taxation one state including respect income taxation internal quotation marks omitted lawrence example dealt mississippi tax scheme structure maryland today mississippi taxed residents income wherever earned nonresidents income earned within state without providing either set taxpayers credit taxes paid elsewhere see miss code ann lawrence upheld mississippi tax net income earned one residents construction public highways tennessee see fully aware mississippi tennessee effectively imposing income tax upon occupation reply brief lawrence state tax see also curry discussing lawrence likewise guaranty trust new york taxed income new york trust distributed virginia resident resident sought block virginia tax order avoid double taxation identical income rejecting challenge reiterated two may simultaneously tax income ibid majority deems cases irrelevant involved challenges brought due process clause commerce clause see ante cases significant however constraints imposed two clauses identical obviously see quill sheer volume consistency precedent confirms rather degree endorsed principle interstate international taxation state may tax residents worldwide income without restriction arising taxes imposed regardless whether state also chooses impose taxes chickasaw nation event incorrect support principle limited due process clause cases shaffer example rejected due process clause challenge dormant commerce clause challenge income tax scheme oklahoma statute described features majority latches onto today oklahoma taxed residents worldwide income nonresidents income without providing credit taxes paid elsewhere either residents nonresidents due process challenge dormant commerce clause challenge see also supra specific tax challenged shaffer tax nonresident income exposed taxpayers risk double taxation maryland tax challenged case majority labors mightily distinguish shaffer dispute one thing give pause today decision overrules shaffer dormant commerce clause holding see ante discard precedents lightly tax shaffer encountered constitutional shoals maryland scheme survive inspection decision west publishing mccolgan reinforces conclusion west publishing summarily affirmed decision california denied dormant commerce clause challenge based principles today majority disrespects merit contention california tax discriminates interstate commerce ground subjects part plaintiff income double taxation given taxability plaintiff entire net income state domicile taxation one state immunization taxation taxation corporation carries business activities justified advantages attend pursuit activities income may taxed state earned state recipient domicile protection benefit power subject matter confined either state cal citations internal quotation marks omitted treating matter summarily rejected argument strikingly similar one majority embraces california tax violated dormant commerce clause subjected interstate commerce risk double tax burden brief appellant opposing motion dismiss affirm west publishing mccolgan pp quoting adams mfg storen long history recounted counsels favor respecting authority tax without discount residents worldwide income justice holmes stated century ago regard mode taxation long standing fact system force long time strong reason leaving improvement may desired legislature paddell city new york recently followed sound advice resisting dormant commerce clause challenge taxing practice pedigree enduring practice case see department revenue davis quoting padell surely advice merits application challenged tax draws support historical practice numerous decisions majority rejects justice holmes counsel observing time chosen exercise plenary authority tax residents worldwide income see ante however learns wrong lesson independent policy decision made chickasaw emphasis added internal quotation marks omitted history demonstrates doub constitutiona authority tax residents income wherever earned majority speculates ante political processes disregards fanciful ante fact worked produce policies ranks responsible reason resist supervision also attempts deflect force precedent relying trilogy decisions finds particularly instructive ante citing central greyhound lines mealey gwin white prince henneford adams majority acknowledges however three decisions involved gross receipts taxes income taxes ante true recently pointed similarities two forms taxation see ante indulgence wishful thinking say previously rejected argument commerce clause distinguishes taxes ante decades including years majority trilogy decided routinely maintained difference taxes net income taxes gross receipts interstate commerce warrants different results commerce clause trost hartman federal limitations state local taxation shaffer example rejected taxpayer dormant commerce clause challenge tax imposed upon gross receipts upon net proceeds three years deciding adams emphasized manifest substantial differences two types taxes calling burden imposed gross receipts tax direct immediate contrast indirect incidental burden imposed income tax stewart dry goods lewis quoting glue town oak creek gwin white opinion observed invalidating gross receipts tax issue left wide scope taxation engaged interstate commerce extending net income derived emphasis added majority asserts rejected distinction moorman mfg see ante decision fact described gross receipts taxes burdensome income taxes twice particular moorman upheld state income tax earlier decision upheld similar inherently burdensome gross receipts tax say constitutionality income tax follows fortiori constitutionality similar burdensome gross receipts tax affirm reject distinction two justices participating trilogy short scarcely expect see three decisions invoked invalidate tax net income ii abandoning principles precedent sustaining simultaneous income taxation offers two reasons striking maryland county income tax tax creates risk double taxation ante deems maryland income tax scheme inherently discriminatory means scheme fails internal consistency test ante first objection overwhelmed history recounted imposing upholding income taxes carried similar risk double taxation see supra reliance internal consistency test compelling rigidly required maintain internally consistent tax regimes today two decades insisted tax review pass internal consistency test see oklahoma tax jefferson lines struck state tax failing test nearly years see american trucking scheiner ata tyler pipe industries washington state dept revenue moreover rejected challenges taxes flunk test oklahoma tax scheme upheld dormant commerce clause shaffer example materially indistinguishable therefore internally inconsistent maryland scheme recently american trucking michigan pub serv upheld concede dly internally inconsistent state tax ata ii satisfied sufficiently close connection tax issue local conduct triggered tax see logic ata ii counsel wynnes appeared recognize see tr oral arg permit state impose head tax flat charge imposed every resident state even tax part internally inconsistent tax scheme tax rest purely local conduct taxpayer residence taxing state taxes paid defray costs closely connected local conduct services used taxpayer living state see reason constitution requires us disarm using progressive tax rather flat toll cover costs local services residents enjoy head tax income tax differ latter measured taxpayer ability pay like head tax however income tax triggered purely local conduct residing state also like head tax income tax covers costs closely connected residence finances services used living state head tax qualifies ata ii reprieve internal consistency must income tax majority asserts maryland tax scheme internally inconsistent operates tariff making unconstitutional ante curious claim defining characteristic tariff taxes interstate activity higher rate taxes activity conducted within state see west lynn creamery maryland resident income tax exact opposite taxes income residents precisely rate whether income earned moreover deep flaw chosen test characterizes internal consistency cure ante test scarcely least double taxation believes justify intervention according maryland tax scheme internally inconsistent maryland simultaneously imposes two taxes county income tax special nonresident tax see ante one taxes county income tax actually falls wynnes interaction two taxes renders maryland tax scheme internally inconsistent maryland eliminate inconsistency terminating special nonresident tax measure help wynnes maryland words bring compliance test heart analysis without removing double tax burden test designed cure illustrate oddity consider simple example april lives works state bob lives state works state ante fail internal consistency test impose tax income residents earn tax income residents earn jurisdictions tax income nonresidents earn according tax schemes troubling bob pay income tax april solely earns income interstate ante state however need pursue approach make tax schemes internally see ante state might choose tax residents worldwide income eliminating tax nonresidents income state might instead choose exclusively tax income earned within state deleting tax residents income state tax scheme internally consistent tax burden april bob remain unchanged original schemes april pay tax state bob pay tax twice state resides state earns income cure words match perceived asserts flaw truism every discrimination case whether brought dormant commerce clause equal protection clause ante simply incorrect acknowledges government impermissibly treats like cases differently discriminates ordinarily cure violation either leveling leveling ibid internal quotation marks omitted consider another april bob example bob must pay tax april must pay tax discrimination eliminated either requiring pay tax leveling requiring pay tax leveling true leveling leaves bob tax bill unchanged leveling nonetheless benefits bob eliminates unfairness treated differently often true dormant commerce clause cases april bob compete market leveling provides concrete benefit placing new burden bob competitors majority rule work way explained maryland cure majority deems discrimination without lowering wynnes taxes increasing tax burden wynnes neighbors terminating special nonresident tax see supra state words satisfy majority lowering bob taxes raising april taxes eliminating taxes imposed yet third taxpayer say cathy internal consistency test thus scarcely resembles ordinary law whatever virtue internal consistency test contexts shortcoming makes poor excuse jettisoning taxation principles entrenched case bottom policy choices prioritize ensuring live work within state shoulder fair share costs government must prioritize avoidance double taxation demonstrated supra achieving even latter goal beyond competence resolving competing tax policy considerations case implicates something even less well equipped century recognized state legislatures congress constitutionally assigned institutionally better equipped balance issues reverse may leave task belongs footnotes federal law corporations permit shareholders elect taxation system income subjected one level taxation corporation profits pass directly shareholders pro rata basis reported shareholders individual tax returns gitlitz commissioner citation omitted maryland affords similar treatment income corporation md contrast corporations organized subchapter rather chapter internal revenue code must pay taxes considered separate tax entities shareholders fletcher cyclopedia law corporations rev ed cum supp limitations number type shareholders may corporations tend smaller closely held corporations principal dissent mischaracterizes import statement moorman gross receipts tax net income tax post statement relative economic impact taxes gross receipts tax applies regardless whether corporation makes profit justice brennan confirmed dissent suggestion net income taxes subject lesser constitutional scrutiny gross receipts taxes indeed noted moorman actual burden interstate commerce iowa imposed plainly valid tax instead challenged net income tax moorman mfg bair similarly sustained dormant commerce clause challenges corporate residents state imposed burden interstate commerce see camps town harrison fulton faulkner central greyhound lines mealey gwin white prince henneford adams mfg storen merit petitioner argument maryland free adopt tax scheme actually intended discriminate interstate commerce reply brief commerce clause regulates effects motives require courts inquire voters legislators reasons enacting law discriminatory effect see associated industries mo lohman philadelphia new jersey hunt washington state apple advertising cases held tax schemes may invalid dormant commerce clause even absent showing actual double taxation mobil oil commissioner taxes gwin white note however petitioner dispute respondents subject actual multiple taxation case mason made america european tax internal consistency test boston college rev principal dissent justice scalia inaccurately state american trucking conceded trucking tax ed internal consistency test upheld tax anyway post scalia dissenting see also post ginsburg dissenting say tax question failed consistency test wrote petitioner argued see american trucking concede true tax case flat tax truck made deliveries michigan tax therefore fell trucks made solely intrastate deliveries made interstate deliveries namely also made intrastate deliveries concede adopted similar tax interstate truck pay fees totaling several hundred dollars even several thousand dollars business carrying local loads many even emphasis added concession tax violated internal consistency test internal consistency test asks whether adoption rule place interstate commerce disadvantage compared commerce intrastate oklahoma tax jefferson lines whether michigan trucking tax effect depended empirical showing petitioners failed make namely challenged tax imposed heavier burden interstate truckers general intrastate truckers michigan tax interstate truckers used michigan roads solely trips started ended outside state pay tax even though benefited use state roads thus treated favorably truckers leave state truckers made interstate trips made intrastate trips treated less favorably explained brief either record evidence abstract logic makes clear whether overall effect system increase reduce existing financial disincentives interstate travel brief american trucking michigan pub serv order apply internal consistency test case must evaluate maryland income tax scheme whole scheme taxes three separate categories income county tax income maryland residents earn maryland county tax income maryland residents earn special nonresident tax income nonresidents earn maryland commerce clause purposes immaterial maryland assigns different labels county tax special nonresident tax taxes applying dormant commerce clause must considered one cf oregon waste systems department environmental quality independent taxes intrastate interstate commerce compensatory rough equivalents imposed upon substantially similar events state labels controlled state always free tax domestic inbound outbound income discriminatory rates simply attaching different labels footnotes see mass acts ch taxing amount inhabitants income profession faculty handicraft trade employment also amount incomes profits gained trading sea shore laws ch providing offices posts profit trades occupations professions ministers gospel denominations schoolmasters excepted shall rated discretion township ward district assessors due regard profits arising see also report oliver wolcott secretary treasury concerning direct taxes american state papers finance describing connecticut income tax assessing relevant estimated gains profits arising lucrative professions trades occupations noting delaware axes hitherto collected estimated annual income inhabitants state without reference specific objects footnotes offers response reason permitting state tax residents worldwide income urge commerce clause doctrine favor corporations individuals see ante scarcely disagree proposition opinion suggest otherwise fail see answers even relevant observation affording residents greater benefits entitles state require bear greater tax burden majority dismisses said goldberg sweet dictum allegedly repudiated west lynn creamery healy ante doubly wrong goldberg distinguished tax struck american trucking scheiner ata noting particular tax ata fell rs whereas tax goldberg fell insider presumably able complain change tax illinois political process essential holding rationale written dictum west lynn creamery far repudiat ing goldberg cited goldberg reaffirmed political safeguards rationale explained see infra page given pedigree rationale applying hardly work sea change commerce clause jurisprudence ante see haulers solid waste management authority goldberg minnesota clover leaf creamery raymond motor rice south carolina highway dept barnwell brothers applying rationale net income tax cast doubt gross receipts precedents ante given longstanding practice evaluating income gross receipt taxes differently see infra unlike maryland county income tax early income taxes allowed deduction taxes paid jurisdictions compare app mo laws pp sess laws wynnes argued majority suggest however maryland fully cure asserted defects tax scheme simply providing deduction lieu tax credit doubt deduction give wynnes much satisfaction deducting taxes paid wynnes million taxable net income reduce maryland tax burden small fraction tax credit majority awards see pet cert app pet cert upholding maryland facially neutral tax hardly means majority contends ante dormant commerce clause places limits authority tax residents worldwide income example principles interstate international taxation permitting kind facially discriminatory tax majority magine state enacting ibid political processes noted adequate safeguard tax see supra majority reads american trucking michigan pub serv ata ii way implausible must resort quoting amicus brief rather opinion according majority think challenged tax failed internal consistency test ata ii held challengers failed make necessary empirical showing see ante true made argument see brief amicus curiae ata ii one searches reports vain indication adopted hardly surprising one scarcely think test turning hypothetically assessing tax structure ante emphasis added require empirical data fact said ata ii tax internal inconsistency excused multiple taxation resulting every state adopting challenged tax caused interstate firms choosing engag local business majority faults dissents disput ing economic analysis beyond citation pair amicus briefs opinion offers analysis dispute ante maryland provide nonresidents credit taxes paid jurisdictions maryland source income cf ante clai groundlessly suggests analysis establish es rule priority taxation ante objection rather treats authority box ing state discrete authority tax basis residence supra inconsisten cy analysis majority plainly errs insisting ante attempting preserve test qualification cure redefines illness double taxation double taxation caused inherently discriminat ory tax scheme ante relying distinction justify test entirely circular however defines inherent discrimination case internal inconsistency event given concern purportedly drives analysis mystifying sees virtue striking one two schemes bob taxed twice ante whatever disincentive original scheme creates bob wynnes work interstate commerce created much revised scheme finds satisfactory