ellis railway clerks argued january decided april section eleventh railway labor act permits union employer require employees relevant bargaining unit join union condition continued employment agreement respondent national union airline required airline clerical employees join union pay agency fees equal members dues petitioners present former clerical employees objected use compelled dues fees specified union activities filed separate suits later consolidated federal district respondents national union board adjustment three locals conceded held machinists street statutory authorization union shop permit union spend objecting employee money union political ideological activities adopted rebate program objecting employees ultimately reimbursed shares expenditures parties disagreed adequacy rebate scheme legality charging objecting employees union expenses national union quadrennial grand lodge convention litigation involving negotiation agreements settlement grievances union publications social activities death benefits employees general organizing efforts granting summary judgment petitioners question liability concerning six expenses issue trial damages held union existing rebate program adequately protected employees rights ordered refunds expenditures issue affirming part reversing part appeals upheld union rebate plan ruled six challenged activities ultimately benefited union efforts finance dues collected objecting employees held petitioners challenge rebate program properly although claim injunction program appear moot union decertified bargaining representative airline clerical employees petitioners additional claim money damages form interest money illegally held period time remains case pp union pure rebate approach refunding portion dues expended improper purposes employee objects inadequate even union pay interest amount refunded still obtain involuntary loan purposes employee objected given existence acceptable alternatives advance reduction dues union allowed ground administrative convenience commit dissenters funds improper uses even temporarily pp petitioners primary submission use fees finance challenged activities violated first amendment initial inquiry whether statute permits union charge petitioners challenged expenditures purpose eleventh authorizing union shop make possible require members bargaining unit pay fair share union costs performing function exclusive bargaining agent thus eliminating free rider employees whose behalf union obliged perform statutory functions refused contribute cost thereof employees object burdened particular union expenditures test must whether challenged expenditures necessarily reasonably incurred purpose performing duties exclusive representative employees dealing employer issues pp regard specific union expenses challenged applicable test petitioners must help defray costs national union conventions members elect officers establish bargaining goals formulate overall union policy conventions essential union discharge duties bargaining agent petitioners may also charged union social activities though central collective bargaining sufficiently related charged employees statute also allows union charge objecting employees monthly magazine insofar reports activities union charge insofar magazine reports activities union spend dissenters funds section eleventh authorize charging objecting employees union general organizing efforts expenses litigation incident negotiating administering contract settling grievances disputes arising bargaining unit question whether statute authorizes compelled participation death benefit program need ruled upon union longer exclusive bargaining agent petitioners longer involved program even assuming petitioners right injunction future collections death benefits entitled refund past contributions since enjoyed form insurance union collected premium pp first amendment barrier regard three challenged activities statute allows union use petitioners contributions significant interference first amendment rights resulting allowing union shop justified governmental interest industrial peace forced contributions union social affairs increase infringement employee first amendment rights union publications conventions direct communicative content little additional infringement first amendment rights none justified governmental interests behind union shop pp white delivered opinion burger brennan marshall blackmun rehnquist stevens connor joined parts ii iii iv except subdivision powell joined powell filed opinion concurring part dissenting part post michael merrill argued cause filed briefs petitioners laurence gold argued cause respondents brief george kaufmann james coppess briefs amici curiae urging reversal filed legal foundation america david crump legal foundation et al myrna field briefs amici curiae urging affirmance filed american federation labor congress industrial organizations albert woll marsha berzon national education association robert chanin briefs amici curiae filed state bar california seth hufstedler robert thompson eddie keller et al ronald zumbrun anthony caso justice white delivered opinion congress amended railway labor act act rla permit previously prohibited union shop section eleventh act permits union employer require employees relevant bargaining unit join union condition continued employment eleventh machinists street held act authorize union spend objecting employee money support political causes use employee funds ends unrelated congress desire eliminate free riders resentment provoked express view expenditures activities area costs led directly complaint free riders expenditures support union political activities petitioners challenge expenditures respondent brotherhood railway airline steamship clerks union brac western airlines implemented previously negotiated agreement requiring western clerical employees join union within days commencing employment agreement interpreted employees need become formal members union must pay agency fees equal members dues petitioners present former clerical employees western objected use compelled dues specified union activities contest legality union shop see railway employees hanson contend however compelled contribute pro rata share expenses negotiating agreements settling grievances western airlines respondents national union board adjustment three locals concede statutory authorization union shop permit use petitioners contributions union political ideological activities see machinists street supra adopted rebate program covering expenditures parties disagree adequacy rebate scheme legality burdening objecting employees six specific union expenses fall extremes identified hanson street quadrennial grand lodge convention litigation involving negotiation agreements settlement grievances union publications social activities death benefits employees general organizing efforts district southern district california granted summary judgment petitioners question liability relying entirely street found six expenses issue among others bargaining activities supported dues collected protesting employees trial damages concluded regard political ideological activities union existing rebate program objecting employees ultimately reimbursed share union expenditures behalf political charitable causes effort comply legal requirements adequately protected employees rights relying exhibits presented respondents ordered refunds approximately dues paid expenditures issue also required protesting employees annual dues thereafter reduced amount spent activities chargeable prior year seems envisioned scheme supplant rebate scheme included political expenditures among figured dues reduction appeals ninth circuit affirmed part reversed part held union rebate plan adequate even though allowed union collect full amount protesting employee dues use part dues objectionable purposes pay rebate year later found suggestions cases method acceptable approved rebate approach earlier case opinion address dues reduction scheme imposed district turning question permissible expenditures appeals framed relevant inquiry whether particular challenged expenditure germane union work realm collective bargaining whether seen promote support maintain union effective collective bargaining agent found challenged activities strengthened union whole helped run smoothly thus making better able negotiate administer agreements six activities ultimately benefited union efforts union free finance dues collected objecting employees one judge dissented arguing institutional expenses objecting employees forced pay petitioners sought review appeals ruling permissible expenses adequacy rebate scheme granted certiorari hold union rebate scheme inadequate appeals erred finding rla authorizes union spend compelled dues general litigation organizing efforts ii question whether petitioners challenge rebate program properly us within month entry district judgment union decertified bargaining representative western airlines clerical employees thus none petitioners presently represented union required pay dues petitioners claim injunction rebate scheme therefore appear moot petitioners also sought money damages damages illegal rebate program necessarily form interest money illegally held period time claim damages remains case amount issue undeniably minute long parties concrete interest however small outcome litigation case moot powell mccormack respondents argue appeals erred addressing validity union rebate scheme supplanted district order union appealed also contend reason adequacy old system justiciable academic brief respondents disagree district specifically held rebate scheme vindicated dissenting employees rights regard political ideological activities appeals affirmed appeals also held expenditures union included rebate scheme ones protesting employees compelled contribute thereby eliminating basis district additional order union reduce dues prospectively event even though district required dues reduction scheme future petitioners receive damages prior allegedly inadequate rebate program precisely lower courts upheld circumstances issue properly us appeals pointed language cases support validity rebate program street suggested restitution individual employee portion money union expended despite notification political causes advised union opposed see also abood detroit board education hand suggested precise advance reduction scheme railway clerks allen described practical decree comprising refund exacted funds proportion union political expenditures bore total union expenditures reduction future exactions proportion opinions purport pass upon statutory constitutional adequacy suggested remedies hold pure rebate approach inadequate exacting using full dues refunding months later portion allowed exact first place union effectively charges employees activities outside scope statutory authorization cost employee course much less money never returned difference degree harm reduced union pay interest amount refunded respondents even union obtains involuntary loan purposes employee objects justification union borrowing administrative convenience readily available alternatives advance reduction dues escrow accounts place slightest additional burden union given existence acceptable alternatives union allowed commit dissenters funds improper uses even temporarily rebate scheme reduces eliminate statutory violation iii petitioners primary submission use fees finance challenged activities violated first amendment argument assumes act allows allegedly unconstitutional exactions constitutionality statute challenged first ascertains whether statute reasonably construed aviod constitutional difficulty califano yamasaki ashwander tva concurring opinion crowell benson noted faced similar claim street restraints unnecessary constitutional claims unless must conclude congress authorizing union shop eleventh also meant labor organization receiving employee money free despite employee objection spend money activities therefore first inquire whether statute permits union charge petitioners challenged expenditures iv section eleventh contains one explicit limitation scope union shop agreement objecting employees may required tender fines penalties normally required union members eleventh nothing else inference drawn limited exception payments obtained voluntary members also required whose membership forced upon indeed several witnesses appearing congressional committees objected absence explicit limitation scope amount fees dues compelled congress enacted provision objections arguably indicates willing tolerate broad exactions objecting employees furthermore congress well aware broad scope traditional union activities hearing witnesses referred general terms costs ctivities labor organizations resulting procurement employee benefits house hearings testimony george harrison policies activities labor unions testimony george weaver indeed pointed securing maintaining collective bargaining agreement expensive undertaking many programs union require financial moral support workers senate hearings statement theodore brown short congress adequately informed broad scope union activities aimed benefiting union members light absence express limitations eleventh plausibly argued congress purported authorize collection involuntary members dues paid regular members view however squarely rejected street dissents three justices cases followed street observed purpose eleventh make possible require members bargaining unit pay fair share costs performing function exclusive bargaining agent union shop eliminate free riders employees obtained benefit union participation machinery act without financially supporting union purpose held congress intended achieved without vesting unions unlimited power spend exacted money undoubtedly union collect employees needed defray expenses entailed negotiating administering collective agreement adjusting grievances disputes held railway employees hanson authority impose dues fees restricted least extent denying unions right employee objection use money support political causes opposes even though congress well aware unions historically expended funds support political candidates issues employees required become members union objected burdened part union expenditures support political ideological causes expressed view union expenses directly involved negotiating administering contract settling grievances railway clerks allen reaffirmed approach taken street described union expenditures fairly charged employees germane collective bargaining still later abood detroit board education found constitutional barrier agency shop agreement municipality teachers union insofar agreement required every employee unit pay service fee defray costs collective bargaining contract administration grievance adjustment union however consistently constitution collect dissenting employees sums support ideological causes germane duties agent neither allen abood however find necessary define line union expenditures employees must help defray sufficiently related collective bargaining justify imposed dissenters remain convinced congress essential justification authorizing union shop desire eliminate free riders employees bargaining unit whose behalf union obliged perform statutory functions refused contribute cost thereof union certified exclusive bargaining agent authorized negotiate contract requiring employees become members make contributions union contract executed dues fees may collected objecting employees members union token obligatory payments required contract authorized eleventh terminate union ceases exclusive bargaining agent hence employees petitioners object burdened particular union expenditures test must whether challenged expenditures necessarily reasonably incurred purpose performing duties exclusive representative employees dealing employer issues standard objecting employees may compelled pay fair share direct costs negotiating administering contract settling grievances disputes also expenses activities undertakings normally reasonably employed implement effectuate duties union exclusive representative employees bargaining unit considerations mind turn particular expenditures petitioners insist may charged conventions every four years brac holds national convention members elect officers establish bargaining goals priorities formulate overall union policy little trouble holding petitioners must help defray costs conventions surely union perform statutory functions must maintain corporate associational existence must elect officers manage carry affairs may consult members overall bargaining goals policy conventions issue normal events congress thoroughly informed seem us essential union discharge duties bargaining agent appeals pointed convention activities guide union approach collective bargaining directly related effectiveness negotiating labor agreements fact like national unions brac required hold either referendum convention least every five years election officers fault choosing elect officers convention rather referendum social activities approximately grand lodge expenditures go toward purchasing refreshments union business meetings occasional social activities activities formally open nonmember employees petitioners insist expenditures entirely unrelated union function representative therefore charged affairs central collective bargaining sufficiently related charged employees appeals noted hese small expenditures important union members bring harmonious working relationships promote closer ties among employees create pleasant environment union meetings ibid say de minimis expenses beyond scope act like conventions social activities union meetings standard feature union operations revealing statement senator thomas chairman senate subcommittee made clear disinclination congress define precisely normal minor union expenses charged objectors want bill say unions must kinds little dues take giving party something nature senate hearings indication members congress inclined scrutinize minor incidental expenses incurred union running operations publications grand lodge puts monthly magazine railway paid union treasury magazine contents varied include articles negotiations contract demands strikes unemployment health benefits proposed recently enacted legislation general news products union boycotting recreational social activities see district findings fact app brief petitioners brief respondents appeals found magazine union primary means communicating information concerning collective bargaining contract administration employees rights employees represented brac union rebate policy objecting employees charged portion magazine devoted political causes app exhibits rebate figured calculating number lines devoted political issues proportion total number lines tr oral arg union must channel communicating employees including objecting ones activities congress assumed known union funds go toward union publications accepted basic union activity costs worker education specifically mentioned hearings house hearings senate hearings magazine important union carrying representational obligations reasonable way reporting constituents respondents limitation publication costs charged objecting employees important one however union spend dissenters funds particular activity justification spending funds writing activity token act surely allows charge objecting employees reporting activities charge organizing appeals found organizing expenses charged objecting employees organizing efforts aimed toward stronger union turn successful bargaining table despite attenuated connection collective bargaining think expenditures outside congress authorization several considerations support conclusion first notion eleventh tool expansion overall union power appears nowhere legislative history contrary brac president expressly disclaimed union shop sought order strengthen bargaining power unions claim seriously advanced union shop necessary hold increase union membership street thus organizational efforts congress aimed enhance authorizing union shop second union shop provision place enforced employees relevant unit already organized definition therefore organizing expenses spent employees outside unit already represented using dues exacted objecting employee recruit members among workers outside bargaining unit afford attenuated benefits collective bargaining behalf dues payer third rationale extend far image smug nonmember stirring resentment enjoying benefits earned employees time money completely place comes union overall organizing efforts one accepts good union good employees proposition petitioners strenuously deny may employees ultimately ride free union organizing efforts outside bargaining unit free rider congress mind employee union required represent withhold benefits obtained members nonbargaining unit organizing directed employee organizing money spent people union members distant way works benefit already paying dues problem roughly comparable resulting union contributions political candidates observed street far cry problem congress concerned litigation expenses litigation incident negotiating administering contract settling grievances disputes arising bargaining unit clearly chargeable petitioners normal incident duties exclusive representative true fair representation litigation arising within unit jurisdictional disputes unions litigation agencies courts concerns bargaining unit employees normally conducted exclusive representative expenses litigation connection bargaining unit charged objecting employees contrary view appeals therefore unless western airlines bargaining unit directly concerned objecting employees need share costs union challenge legality airline industry mutual aid pact litigation seeking protect rights airline employees generally bankruptcy proceedings defending suits alleging violation nondiscrimination requirements title vii civil rights act death benefits brac pays general funds death benefit designated beneficiary member nonmember required pay dues union street adjudicate legality eleventh compelled participation death benefit program citing example expenditure area costs led directly complaint free riders expenditures support union political activities allen state trial like district case found compelled payments support brac death benefit system reasonably necessary related collective bargaining charged objecting employees see found unnecessary reach correctness conclusion appeals said death benefits historically played important role labor organizations insurance benefits mandatory subject bargaining providing benefits rather seeking employer brac better position negotiate additional benefits higher wages added provision death benefits plan tends strengthen employee ties union germane work union within realm collective bargaining consistent affidavit one union expert witnesses effect death benefit funds provide desirable economic benefit union members therefore serve organizational aid means strengthening union internally affidavit lloyd ulman app petitioners course press view death benefits connection collective bargaining let alone one warrant forcing participate system find unnecessary rule question union longer exclusive bargaining agent petitioners longer involved death benefits system issue whether petitioners entitled refund past contributions think entitled even right injunction prevent future collections death benefits although objected use funds support benefits plan remained entitled benefits plan long paid dues thus enjoyed form insurance union collected premium doubt equities call refund payments vi petitioners primary argument union compel financial support six activities violates first amendment need address contention regard three activities held rla allows union use contributions perceive constitutional barrier first amendment limit uses union put funds obtained dissenting employees see generally abood detroit board education allowing union shop already countenanced significant impingement first amendment rights dissenting employee forced support financially organization whose principles demands may disagree required help finance union agent might well thought interfere way employee freedom associate advancement ideas refrain sees fit long settled interference first amendment rights justified governmental interest industrial peace ibid street douglas concurring hanson minimum union may constitutionally expend uniform exactions agreement support activities germane collective bargaining railway clerks allen issue whether expenses involve additional interference first amendment interests objecting employees whether nonetheless adequately supported governmental interest petitioners explicitly contend union social activities implicate serious first amendment interests need determine whether contributing money affairs act triggering first amendment protection extent communicative content inherent act stems union involvement objection union social hours therefore fact employee forced contribute increase infringement first amendment rights already resulting compelled contribution union petitioners may feel money mean first amendment complaint first amendment concerns regard publications conventions serious direct communicative content involve expression ideas nonetheless perceive little additional infringement first amendment rights beyond already accepted none justified governmental interests behind union shop discussion expenses indicated relat work union realm collective bargaining hanson supra nature problem governmental interest overcoming require union certain flexibility use compelled funds furtherance common cause leaves leeway leadership group abood supra quoting street supra douglas concurring expenses well within acceptable range vii appeals erred holding respondents entitled charge petitioners pro rata share union organizing litigating expenses former rebate scheme adequately protected objecting employees misuse contributions judgment appeals affirmed part reversed part case remanded proceedings consistent opinion ordered footnotes eleventh notwithstanding provisions act statute law territory thereof state carrier carriers defined act labor organization labor organizations duly designated authorized represent employees accordance requirements act shall permitted make agreements requiring condition continued employment within sixty days following beginning employment effective date agreements whichever later employees shall become members labor organization representing craft class provided agreement shall require condition employment respect employees membership available upon terms conditions generally applicable member respect employees membership denied terminated reason failure employee tender periodic dues initiation fees assessments including fines penalties uniformly required condition acquiring retaining membership make agreements providing deduction carrier carriers wages employees craft class payment labor organization representing craft class employees periodic dues initiation fees assessments including fines penalties uniformly required condition acquiring retaining membership stat eleventh case consolidation two separate suits one brought present former western employees join union ellis railway clerks class action brought employees fails railway clerks class member sent following letter union employee western airlines feel brotherhood railway airline steamship clerks properly represent interests protest compulsory agency fee must pay brotherhood railway airline steamship clerks order retain job addition hereby protest use fees purpose cost collective bargaining specifically protest support legislative goals candidates political office political efforts kind nature ideological causes activity direct cost collective bargaining behalf demand accounting refund brotherhood railway airline steamship clerks fees exacted agency fee app certified ruling interlocutory appeal appeals ninth circuit permit appeal complaints petitioners made generalized claim monetary damages injuries sustained result defendants unlawful unwarranted interference deprivation constitutional civil statutory contractual rights app us adequacy dues reduction scheme imposed district issue among questions presented petition certiorari appeals address record reveal whether scheme ever implemented courts considered question divided compare robinson new jersey supp nj school committee greenfield education mass robbinsdale education assn robbinsdale federation teachers vacated remanded holding suggesting scheme adequately protect rights dissenting employees seay mcdonnell douglas opinion justices association capitol powerhouse engineers division bldg grounds upholding rebate programs see generally perry local senator hill one bill sponsors explained senate floor assessments include fines penalties thus individual member fined infraction union bylaws constitution union obtain discharge agreement event member refuses fails pay fine imposed cong rec jacob aronson vice president new york central railroad complained proposal even limit number kind amount dues fees assessments may required particular union hearings house committee interstate foreign commerce house hearings see also hearings subcommittee senate committee labor public welfare senate hearings daniel loomis appearing association western railways objected ithout limitation upon right organizations levy dues fees assessments employees made subject unwarranted unlimited deductions pay voice kind amount dues fees assessments funds thus raised used indiscriminately organizations many cases solely discretion officers organizations house hearings see also senate hearings example george harrison president brac took conventions example asked explain difference dues assessments may international union convention every years convention expense assessment cover cost holding conventions fireman pay expenses extra assessment dues union dues cover make distribution internally different funds house hearings see also senate hearings testimony paul monahan railroad workers conventions extremely costly proposition order give membership people bargain best representation least possible cost conventions held biannually rather annually emphasis added given holding objecting employees charged union organizing litigation charged expense reporting activities membership asked union shop strengthen bargaining presently exists railroad industry harrison replied think affect power bargaining one way get majority employees vote union bargaining agent got much economic power stage development ever man going scab scab whether union make difference house hearings district found organizing expenses spent part recruit new union members within bargaining unit agreement involved case administered agency shop rather union shop provision terms eleventh authorizes negotiation union shop may read authorize negotiation agency shop see nlrb general motors interpreting equivalent provision national labor relations act perverse read allowing union charge objecting nonmembers part costs attempting convince become members oral argument petitioners counsel stated time complaints filed nonmembers fact eligible death benefits even though agency fees helped support program tr oral arg pretrial filings petitioners relied example union breach duty fair representation see record doc fair representation argument us clear record whether petitioners correct factual matter see record doc defendants memorandum opposition summary judgment hesitation holding however union lacks authorization rla use nonmembers fees death benefits receive section eleventh based presumption nonmembers benefits equally members uses union money put remand damages recalculated petitioners argue new trial required district applied rather standard proof plain discussion issue railway clerks allen held union bears burden proving proportion expenditures went activities charged dissenters heightened standard appropriate situation noted bsolute precision calculation proportion course expected required mindful difficult accounting problems may arise fact petitioners invoke first amendment insufficient reason impose heightened standard opponents perceive need abandon preponderance standard normally applicable civil suits damages see generally addington texas justice powell concurring part dissenting part accord parts ii iii iv opinion part except subdivision addresses convention issue also agree analysis part vi petitioners first amendment arguments disposed summarily part opinion considers whether railway labor act permits respondent union charge nonunion employees challenged expenditures first amendment upon petitioners primarily rely basis decision except extent addressed part vi light prior decisions construing act agree decision dispose petitioners claims statutory rather constitutional grounds relevant general principles shown well settled railway employees hanson machinists street railway clerks allen clear decisions objecting nonunion employees may properly required contribute political causes may disagree prior decision however define line union expenditures employees must help defray sufficiently related collective bargaining justify imposed dissenters ante today adopts statutory test standard identifying expenditures fairly viewed benefiting employees hen employees petitioners case object burdened particular union expenditures test must whether challenged expenditures necessarily reasonably incurred purpose performing duties exclusive representative employees dealing employer issues ante single paragraph concludes view primary purposes national convention appropriate petitioners help defray costs conventions ante agree conventions necessary elect officers determine union policy respect major issues collective bargaining generally enable national union perform essential functions exclusive bargaining representative employees seriously questioned conventions also afford opportunities often fully exploited political objectives unions generally particular union convention district findings case based record respect quadrennial convention brac cost union approximately minutes convention indicate number major addresses made prominent politicians including senators humphrey kennedy hartke schweiker mayor washington four congressmen union shown major participation politicians contributed even remotely collective bargaining union may compel dissenting employees defray cost union expenses must meet burden showing expenses necessarily reasonably incurred purpose performing duties exclusive representative ante see railway clerks allen apparently effort made union case identify expenses fairly attributable political activities make appropriate deductions dues objecting employees suggest allocation made mathematical exactitude reasonable estimates surely made see ibid union properly felt responsibility allocate expenses political material carried union publications see ante view foregoing understand make judgment today expenses quadrennial meeting brac qualify new standard necessarily reasonably incurred purpose performing duties exclusive representative therefore reverse appeals issue remand case consideration light standard articulated ii part vi found necessary address petitioners first amendment argument respect three six activities issue social affairs publications conventions reasoning clear agrees must first amendment limit uses union put funds obtained dissenting employees ante citing abood detroit board education nevertheless conclusion respect convention expenses appears ignore constraint part expressed disagreement apparent determination railway labor act permits use compulsory dues help defray costs political activities incurred quadrennial conventions interpretation act unnecessary reach constitutional question case even congress intended act permit use compulsory dues clear first amendment funds used political causes nonmembers may disagree decisions explicit nonmember employees may compelled bear expenditures conclusory disposition petitioners argument ignores force decisions see abood supra street douglas concurring concerns prohibit union constitutional matter charging dissenting employees publication expenses related political causes determined act prohibits union charging dissenting employees publication expenses unrelated collective bargaining ante assume first amendment discussion part vi applies publication expenses directly related collective bargaining thus concur part vi opinion extent holds first amendment bar publication expenses necessarily reasonably incurred purpose performing duties exclusive representative iii reasons stated join parts ii iii iv subdivision part convention issue addressed subdivision believe judgment reversed case remanded appeals consideration light test articulated today view position issue think necessary reach first amendment issue conventions agree summary conclusion first amendment rights implicated expenditure funds political causes conventions therefore dissent decision part subdivision decision respect conventions found part vi concur remainder result reached part vi respondents brief emphasizes purposes activities quadrennial conventions relate even though sometimes tangentially collective bargaining respondents brief deals lightly political speeches activities say appearances mayor washington public officials created additional costs brac costs paying honoraria costs deducted dues objecting employees brief respondents brief explanation leaves number unanswered questions example record appear reveal defrayed travel hotel expenses speakers staff made political speeches whose purpose attending political causes record show paid considerable entertaining likely provided speakers distinguished mentioned may may fairly considered appropriate expense standard short least seem appropriate record us assume union activities disassociated political causes case remanded full development facts abood observed dissenting employees specifically argue may constitutionally prevent union spending part required service fees contribute political candidates express political views unrelated duties exclusive bargaining representative concluded argument meritorious one respect social activities concur result reached first amendment analysis points expenditures activities de minimis petitioners contend social activities implicate serious first amendment interests ante within reasonable limits think fairly may argued social occasions related duties union exclusive representative employees bargaining unit fraternal aspect union may relevant bargaining capability held first amendment permits union expend uniform exactions agreement support activities germane collective bargaining railway clerks allen