motor vehicle mfrs assn state farm argued april decided june national traffic motor vehicle safety act act directs secretary transportation issue motor vehicle safety standards shall practicable shall meet need motor vehicle safety shall stated objective terms issuing standards secretary directed consider relevant available motor vehicle safety data whether proposed standard reasonable practicable appropriate particular type motor vehicle prescribed extent standards contribute carrying purposes act act authorizes judicial review administrative procedure act orders establishing amending revoking motor vehicle safety standard national highway traffic safety administration nhtsa secretary delegated authority promulgate safety standards rescinded requirement modified standard new motor vehicles produced september equipped passive restraints automatic seatbelts airbags protect safety occupants vehicle event collision explaining rescission nhtsa maintained longer able find modified standard issued automatic restraint requirement produce significant safety benefits nhtsa assumed airbags installed new cars automatic seatbelts became apparent automobile manufacturers planned install automatic seatbelts approximately new cars overwhelming majority seatbelts easily detached left way permanently thus precluding realization lifesaving potential airbags requiring type affirmative action stumbling block achieving high usage manual belts reason nhtsa concluded longer basis reliably predicting modified standard lead significant increased usage restraints hence nhtsa view automatic restraint requirement longer reasonable practicable moreover given high expense implementing requirement limited benefits arising therefrom nhtsa feared many consumers regard modified standard instance ineffective regulation petitions review nhtsa rescission passive restraint requirement appeals held rescission arbitrary capricious grounds nhtsa conclusion reliably predict increase belt usage standard insufficient basis rescission nhtsa inadequately considered possibility requiring manufacturers install nondetachable rather detachable passive belts agency failed give consideration requiring compliance standard installation airbags found congressional reaction various versions standard raised doubts nhtsa rescission necessarily demonstrates effort fulfill statutory mandate therefore agency obligated provide increasingly clear convincing reasons action held nhtsa rescission passive restraint requirement modified standard arbitrary capricious agency failed present adequate basis explanation rescinding requirement must either consider matter adhere amend standard along lines analysis supports pp rescission occupant crash protection standard subject standard judicial review arbitrary capricious standard promulgation standard judged petitioner motor vehicle manufacturers association contends standard used judge agency refusal promulgate rule first place act expressly equates orders revoking establishing safety standards association view render meaningless congress authorization judicial review orders revoking safety standards agency changing course rescinding rule obligated supply reasoned analysis change beyond may required agency act first instance scope review arbitrary capricious standard narrow substitute judgment agency agency nevertheless must examine relevant data articulate satisfactory explanation action reviewing explanation must consider whether decision based consideration relevant factors whether clear error judgment pp appeals correctly found arbitrary capricious standard judicial review applied rescission agency regulations erred intensifying scope review based upon reading legislative events agency interpretation statute may confirmed ratified subsequent congressional failure change interpretation even unequivocal ratification passive restraint requirement connote approval disapproval nhtsa later decision rescind requirement decision remains subject arbitrary capricious standard pp first reason finding nhtsa rescission modified standard arbitrary capricious apparently gave consideration modifying standard require airbag technology utilized even nhtsa conclusion detachable automatic seatbelts attain anticipated safety benefits many individuals detach mechanism acceptable entirety standing alone justify amendment standard disallow compliance means one technology provide effective passenger protection cast doubt need passive restraint requirement upon efficacy airbag technology airbag policy alternative passive restraint requirement technology alternative within admit existing standard pp nhtsa quick dismiss safety benefits automatic seatbelts explanation rescission passive restraint requirement sufficient enable conclude rescission product reasoned decisionmaking agency took account critical difference detachable automatic seatbelts current manual seatbelts failed articulate basis requiring nondetachable belts thus failed offer rational connection facts judgment required pass muster arbitrary capricious standard pp white delivered opinion brennan marshall blackmun stevens joined parts vi burger powell rehnquist joined rehnquist filed opinion concurring part dissenting part burger powell joined post together consumer alert et al state farm mutual automobile insurance et al department transportation et al state farm mutual automobile insurance et also certiorari solicitor general lee argued cause petitioners briefs assistant attorney general mcgrath deputy solicitor general geller edwin kneedler robert kopp michael hertz frank berndt david allen enid rubenstein eileen leahy lloyd cutler argued cause petitioners briefs john pickering william perlik andrew weissman william richardson milton andrews lance tunick william crabtree edward good henry nolte otis smith charles sharp william weber raymond momboisse sam kazman ronald zumbrun filed briefs petitioners james fitzpatrick argued cause respondents cases brief respondents state farm mutual automobile insurance et al michael sohn john quinn merrick garland robert abrams attorney general new york robert hammer assistant attorney general peter schiff martin minkowitz milton freedman filed brief respondent superintendent insurance state new york raymond rasenberger lawrence merthan jerry cox lowell beck filed brief respondents national association independent insurers et fn briefs amici curiae urging affirmance filed dennis barbour american college preventive medicine et al nathan lewin american insurance association philip collins thomas mcgrath automotive occupant protection association alexandra finucane epilepsy foundation america et al katherine hall center auto safety et al simon lazarus iii mothers drunk drivers john quinn john hardin young national association insurance commissioners justice white delivered opinion development automobile gave americans unprecedented freedom travel exacted high price enhanced mobility since motor vehicles leading cause accidental deaths injuries americans died motor vehicle accidents hundreds thousands maimed injured consensus exists current loss life highways unacceptably high improving safety admit easy solution congress decided least part answer lies improving design safety features vehicle much technology building safer cars undeveloped untested changes automobile design mandated effectiveness changes studied costs examined public acceptance considered task called considerable expertise congress responded enacting national traffic motor vehicle safety act act stat amended et seq ed supp act created purpose reduc ing traffic accidents deaths injuries persons resulting traffic accidents directs secretary transportation delegate issue motor vehicle safety standards shall practicable shall meet need motor vehicle safety shall stated objective terms supp issuing standards secretary directed consider relevant available motor vehicle safety data whether proposed standard reasonable practicable appropriate particular type motor vehicle extent standards contribute carrying purposes act act also authorizes judicial review provisions administrative procedure act apa orders establishing amending revoking federal motor vehicle safety standard authority review today whether nhtsa acted arbitrarily capriciously revoking requirement motor vehicle safety standard new motor vehicles produced september equipped passive restraints protect safety occupants vehicle event collision briefly summarized hold agency failed present adequate basis explanation rescinding passive restraint requirement agency must either consider matter adhere amend standard along lines analysis supports regulation whose rescission issue bears complex convoluted history course approximately rulemaking notices requirement imposed amended rescinded reimposed rescinded originally issued department transportation standard simply required installation seatbelts automobiles fed reg soon became apparent level seatbelt use low reduce traffic injuries acceptable level department therefore began consideration passive occupant restraint systems devices depend effectiveness upon action taken occupant except necessary operate vehicle two types automatic crash protection emerged automatic seatbelts airbags automatic seatbelt traditional safety belt fastened interior door remains attached without impeding entry exit vehicle deploys automatically without action part passenger airbag inflatable device concealed dashboard steering column automatically inflates sensor indicates deceleration forces accident exceeded preset minimum rapidly deflates dissipate forces lifesaving potential devices immediately recognized substantial experience devices estimated nhtsa passive restraints prevent approximately deaths serious injuries annually fed reg department formally proposed standard requiring installation passive restraints fed reg thereby commencing lengthy series proceedings agency revised standard include passive protection requirements fed reg agency amended standard require full passive protection front seat occupants vehicles manufactured august fed reg interim vehicles built august august carry either passive restraints lap shoulder belts coupled ignition interlock prevent starting vehicle belts connected review agency decision require passive restraints found supported substantial evidence upheld chrysler department transportation preparing upcoming model year car makers chose ignition interlock option decision highly unpopular led congress amend act prohibit motor vehicle safety standard requiring permitting compliance means ignition interlock continuous buzzer designed indicate safety belts use motor vehicle schoolbus safety amendments pub stat amendments also provided safety standard satisfied system seatbelts submitted congress vetoed concurrent resolution houses effective date mandatory passive restraint systems extended year august fed reg june secretary transportation william coleman initiated new rulemaking issue fed reg hearing testimony reviewing written comments coleman extended optional alternatives indefinitely suspended passive restraint requirement although found passive restraints technologically economically feasible secretary based decision expectation widespread public resistance new systems instead proposed demonstration project involving cars installed passive restraints order smooth way public acceptance mandatory passive restraints later date department transportation secretary decision concerning motor vehicle occupant crash protection app coleman successor secretary transportation disagreed within months assuming office secretary brock adams decided demonstration project unnecessary issued new mandatory passive restraint regulation known modified standard fed reg cfr modified standard mandated phasing passive restraints beginning large cars model year extending cars model year two principal systems satisfy standard airbags passive belts choice system install left manufacturers pacific legal foundation department transportation app cert denied appeals upheld modified standard rational nonarbitrary regulation consistent agency mandate act standard also survived scrutiny congress exercise authority legislative veto provision amendments next several years automobile industry geared comply modified standard late july nhtsa reported road experience thousands vehicles equipped air bags automatic safety belts confirmed agency estimates benefits systems cars equipped automatic crash protection systems year estimated lives saved tens thousands serious injuries prevented nhtsa automobile occupant crash protection progress report app cadc hereinafter ii statement explaining rescission nhtsa maintained longer able find automatic restraint requirement produce significant safety benefits notice judgment reflected change opinion effectiveness technology change plans automobile industry agency assumed airbags installed new cars automatic seatbelts became apparent automobile manufacturers planned install automatic seatbelts approximately new cars reason lifesaving potential airbags realized moreover appeared overwhelming majority passive belts planned installed manufacturers detached easily left way permanently passive belts detached required type affirmative action stumbling block obtaining high usage levels manual belts reason agency concluded longer basis reliably predicting standard lead significant increased usage restraints view possibly minimal safety benefits automatic restraint requirement longer reasonable practicable agency view requirement require approximately billion implement agency believe reasonable impose substantial costs manufacturers consumers without adequate assurance sufficient safety benefits accrue addition nhtsa concluded automatic restraints might adverse effect public attitude toward safety given high expense limited benefits detachable belts nhtsa feared many consumers regard standard instance ineffective regulation adversely affecting public view safety regulation particular poisoning popular sentiment toward efforts improve occupant restraint systems future state farm mutual automobile insurance national association independent insurers filed petitions review nhtsa rescission passive restraint standard appeals district columbia circuit held agency rescission passive restraint requirement arbitrary capricious app observing rescission unrelated agency refusal take action first instance concluded case nhtsa discretion rescind passive restraint requirement restricted various forms congressional reaction passive restraint issue proceeded find rescission standard arbitrary capricious three reasons first found insufficient basis rescission nhtsa conclusion reliably predict increase belt usage standard held insufficient evidence record sustain nhtsa position issue well justified refusal seek evidence render rescission second majority panel concluded nhtsa inadequately considered possibility requiring manufacturers install nondetachable rather detachable passive belts third majority found agency acted arbitrarily capriciously failing give consideration whatever requiring compliance modified standard installation airbags allowed nhtsa days submit schedule resolving questions raised th opinion subsequently agency filed notice proposed supplemental rulemaking setting forth schedule complying mandate august appeals issued order staying compliance date passive restraint requirement september requested nhtsa inform whether compliance date achievable nhtsa informed october based representations manufacturers appear practicable compliance achieved september november granted certiorari november appeals entered order recalling mandate iii unlike appeals find appropriate scope judicial review troublesome question cases act amendments concerning occupant crash protection standards indicate motor vehicle safety standards promulgated informal rulemaking procedures administrative procedure act agency action promulgating standards therefore may set aside found arbitrary capricious abuse discretion otherwise accordance law citizens preserve overton park volpe bowman transportation freight system believe rescission modification standard subject test section act procedural judicial review provisions administrative procedure act shall apply orders establishing amending revoking federal motor vehicle safety standard suggests difference scope judicial review depending upon nature agency action petitioner motor vehicle manufacturers association mvma disagrees contending rescission agency rule judged standard use judge agency refusal promulgate rule first place standard petitioner believes considerably narrower traditional test reject view act expressly equates orders revoking establishing safety standards neither act apa suggests revocations treated refusals promulgate standards petitioner view render meaningless congress authorization judicial review orders revoking safety rules moreover revocation extant regulation substantially different failure act revocation constitutes reversal agency former views proper course settled course behavior embodies agency informed judgment pursuing course carry policies committed congress least presumption policies carried best settled rule adhered atchison wichita bd trade accordingly agency changing course rescinding rule obligated supply reasoned analysis change beyond may required agency act first instance holding fully recognize egulatory agencies establish rules conduct last forever american trucking atchison agency must given ample latitude adapt rules policies demands changing circumstances permian basin area rate cases forces change always necessarily point direction deregulation abstract reason presume changing circumstances require rescission prior action instead revision even extension current regulation congress established presumption judicial review start presumption contrary petitioners views safety regulation changes current policy justified rulemaking record removal regulation may entail monetary expenditures costs enacting new standard accordingly may easier agency justify deregulatory action direction agency chooses move alter standard judicial review established law department transportation accepts applicability arbitrary capricious standard argues standard reviewing may set aside agency rule rational based consideration relevant factors within scope authority delegated agency statute disagree formulation scope review arbitrary capricious standard narrow substitute judgment agency nevertheless agency must examine relevant data articulate satisfactory explanation action including rational connection facts found choice made burlington truck lines reviewing explanation must consider whether decision based consideration relevant factors whether clear error judgment bowman transportation freight system supra citizens preserve overton park volpe supra normally agency rule arbitrary capricious agency relied factors congress intended consider entirely failed consider important aspect problem offered explanation decision runs counter evidence agency implausible ascribed difference view product agency expertise reviewing attempt make deficiencies may supply reasoned basis agency action agency given sec chenery however uphold decision less ideal clarity agency path may reasonably discerned bowman transportation freight system supra see also camp pitts per curiam purposes cases also relevant congress required record rulemaking proceedings compiled submitted reviewing intended agency findings act supported substantial evidence record considered whole iv appeals correctly found test applied rescissions prior agency regulations erred intensifying scope review based upon reading legislative events held congressional reaction various versions standard raise doubts nhtsa rescission necessarily demonstrates effort fulfill statutory mandate therefore agency obligated provide increasingly clear convincing reasons action app specifically appeals found significance three legislative occurrences congress banned ignition interlock foreclose nhtsa pursuit passive restraint standard congress allowed standard take effect neither concurrent resolutions needed disapproval passed majority house indicated support concept mandatory passive restraints majority house supported unprecedented attempt require installation airbags path analysis misguided inferences produced questionable noteworthy respondent state farm expressly agrees legislative history act heighten standard review nhtsa actions brief respondent state farm mutual automobile insurance state farm concession well taken never suggested standard review enlarged diminished subsequent congressional action agency interpretation statute may confirmed ratified subsequent congressional failure change interpretation bob jones university haig agee cases us even unequivocal ratification short statutory incorporation passive restraint standard connote approval disapproval agency later decision rescind regulation decision remains subject standard quick infer congressional mandate passive restraints confirmed examining postenactment legislative events cited appeals even inclined rely inchoate legislative action inferences drawn fail suggest nhtsa acted improperly rescinding standard first mandatory passive restraint standard technically effect see supra congress reason foreclose course moreover one hardly infer support mandatory standard congress decision provide regulation subject disapproval resolutions disapproval houses similarly mandate divined tabling resolutions disapproval introduced failure congress exercise veto might reflect legislative deference agency expertise indicate congress disapprove agency action even congress favored standard like nhtsa may well reach different judgment given changed circumstances four years later finally appeals read much floor action authorization bill bill enacted law contemporaneous events read showing equal congressional hostility passive restraints ultimate question us whether nhtsa rescission passive restraint requirement standard arbitrary capricious conclude appeals also conclude somewhat different reasons consideration issue agency therefore required deal separately rescission applies airbags applies seatbelts first obvious reason finding rescission arbitrary capricious nhtsa apparently gave consideration whatever modifying standard require airbag technology utilized standard sought achieve automatic crash protection requiring automobile manufacturers install either two passive restraint devices airbags automatic seatbelts suggestion long rulemaking process led standard one options feasible passive restraint standard promulgated indeed agency original proposed standard contemplated installation inflatable restraints cars automatic belts added means complying standard believed effective airbags achieving goal occupant crash protection fed reg time passive belt approved agency detached later manufacturer behest agency approve detachability feature assurances feature compromise safety benefits restraint although foreseen new cars contain airbags automatic seatbelts ratio two significant long passive belt also assure greater passenger safety agency determined detachable automatic belts attain anticipated safety benefits many individuals detach mechanism even conclusion acceptable entirety see infra standing alone justify amendment standard disallow compliance means one technology provide effective passenger protection cast doubt need passive restraint standard upon efficacy airbag technology recent rulemaking agency acknowledged lifesaving potential airbag agency basis time changing earlier conclusions basic air bag technology sound sufficiently demonstrated effective vehicles current use nhtsa final regulatory impact analysis ria app findings analysis justify choice made indication basis agency exercised expert discretion prepared administrative procedure act permit us accept practice expert discretion lifeblood administrative process unless make requirements administrative action strict demanding expertise strength modern government become monster rules practical limits discretion new york dissenting opinion omitted automobile industry opted passive belt airbag surely enough regulated industry eschewed given safety device nearly decade automobile industry waged regulatory equivalent war airbag lost inflatable restraint proved sufficiently effective automobile industry decided employ seatbelt system meet safety objectives standard hardly constitutes cause revoke standard indeed act necessary industry sufficiently responsive safety concerns act intended safety standards depend current technology sense inducing development superior safety design see chrysler department transportation statute agency defer industry failure develop safer cars surely fortiori may revoke safety standard satisfied current technology simply industry opted ineffective seatbelt design although agency address mandatory airbag option appeals noted airbags seem none problems nhtsa identified passive seatbelts app petitioners recite number difficulties believe posed mandatory airbag standard range questions concerning installation airbags small cars adverse public reaction agency reasons rejecting mandatory airbag standard discussed possibility agency submitted reasons short sufficient answer petitioners submission courts may accept appellate counsel post hoc rationalizations agency action burlington truck lines well established agency action must upheld basis articulated agency ibid sec chenery american textile mfrs institute donovan petitioners also invoke decision vermont yankee nuclear power natural resources defense council though talisman agency decision definition unimpeachable specifically submitted require agency consider alternative essence dictate agency procedures follow petitioners misread vermont yankee misconstrue nature remand order vermont yankee held may impose additional procedural requirements upon agency require today specific procedures nhtsa must follow broadly require agency consider policy alternatives reaching decision true rulemaking found wanting simply agency failed include every alternative device thought conceivable mind man regardless uncommon unknown alternative may airbag policy alternative passive restraint standard technological alternative within ambit existing standard hold given judgment made airbags effective technology mandatory passive restraint rule may abandoned without consideration whatsoever requirement although issue closer also find agency quick dismiss safety benefits automatic seatbelts nhtsa critical finding light industry plans install readily detachable passive belts reliably predict even percentage point increase minimum level expected usage increase fed reg appeals rejected finding one iota evidence modified standard fail increase nationwide seatbelt use least percentage points level increased usage necessary standard justify cost given lack probative evidence held well justified refusal seek evidence render rescission app petitioners object conclusion view substantial uncertainty regulation accomplish intended purpose sufficient reason without rescind regulation agree petitioners agency reasonably may decline issue safety standard uncertain efficacy agency may also revoke standard basis serious uncertainties supported record reasonably explained rescission passive restraint requirement arbitrary capricious simply evidence direct support agency conclusion infrequent available data settle regulatory issue agency must exercise judgment moving facts probabilities record policy conclusion recognizing policymaking complex society must account uncertainty however imply sufficient agency merely recite terms substantial uncertainty justification actions previously noted agency must explain evidence available must offer rational connection facts found choice made burlington truck lines supra generally one aspect explanation justification rescinding regulation engaging search evidence cases agency explanation rescission passive restraint requirement sufficient enable us conclude rescission product reasoned decisionmaking reach conclusion upset agency view facts appreciate limitations record supporting agency decision start accepted ground used seatbelts unquestionably save many thousands lives prevent tens thousands crippling injuries unlike recent regulatory decisions reviewed industrial union dept american petroleum institute american textile mfrs institute donovan safety benefits wearing seatbelts doubt challenged benefits accrue monetary costs implementing standard easily justified move next fact direct evidence support agency finding detachable automatic belts predicted yield substantial increase usage empirical evidence record consisting surveys drivers automobiles equipped passive belts reveals doubling usage rate experienced manual belts much agency rulemaking statement much controversy cases centers conclusions drawn studies agency maintained doubling seatbelt usage studies extrapolated mandatory standard passive seatbelts guarded ignition interlocks purchasers tested cars somewhat atypical respondents insist studies demonstrate modified standard substantially increase seatbelt usage believe within agency discretion pass upon generalizability field studies precisely type issue rests within expertise nhtsa upon reviewing must hesitant intrude accepting agency view field tests passive restraints indicates reliable experience usage rates substantially increase sure nhtsa opines reliably predict even percentage point increase minimum level expected increased usage notice fed reg statements passive belts yield substantial increases seatbelt usage apparently take account critical difference detachable automatic belts current manual belts detached passive belt require affirmative act reconnect unlike manual seatbelt passive belt reattached continue function automatically unless disconnected thus inertia factor agency studies found significant explaining current low usage rates seatbelts works favor use protective device since motorists currently wear seatbelts occasions seem grounds believe seatbelt use occasional users substantially increased detachable passive belts whether fact case matter agency decide must bring expertise bear question agency correct look costs well benefits standard agency conclusion incremental costs requirements longer reasonable predicated prediction safety benefits regulation might minimal specifically agency fears public may resent paying automatic belt systems expressly dependent assumption detachable automatic belts produce negligible safety benefits agency reexamines findings likely increase seatbelt usage must also reconsider judgment reasonableness monetary costs associated standard reaching judgment nhtsa bear mind congress intended safety factor act committee intends safety shall overriding consideration issuance standards bill committee recognizes secretary necessarily consider reasonableness cost feasibility adequate leadtime establishing standards secretary must conform requirement standard practicable require consideration relevant factors including technological ability achieve goal particular standard well consideration economic factors motor vehicle safety paramount purpose bill standard must related thereto failing analyze continuous seatbelts option right agency failed offer rational connection facts judgment required pass muster standard agree appeals nhtsa suggest emergency release mechanisms used nondetachable belts less effective emergency egress buckle release system used detachable belts general motors obtained agency approval install continuous passive belt assured agency nondetachable belts spool releases safe detachable belts buckle releases fed reg nhtsa satisfied belt design assured easy extricability agency believe use release mechanisms cause serious occupant egress problems agency entitled change view acceptability continuous passive belts obligated explain reasons agency also failed offer explanation continuous passive belt engender adverse public reaction ignition interlock appeals concluded every indication record points way app see basis equating two devices continuous belt unlike ignition interlock interfere operation vehicle importantly agency responsibility explain decision vi agency view public interest may change either without change circumstances agency changing course must supply reasoned analysis greater boston television fcc app omitted cert denied accept reasoning appeals conclude agency failed supply requisite reasoned analysis case accordingly vacate judgment appeals remand cases directions remand matter nhtsa consideration consistent opinion ordered footnotes senate committee commerce reported promotion motor vehicle safety voluntary standards largely failed unconditional imposition mandatory standards earliest practicable date course commensurate highway death injury toll secretary general authority promulgate safety standards act delegated administrator national highway traffic safety administration nhtsa cfr opinion use terms nhtsa agency interchangeably referring national highway traffic safety administration department transportation secretary transportation early process assumed passive occupant protection meant installation inflatable airbag restraint systems see fed reg however agency observed ome concepts advanced appear capable meeting complete passive protection options leading add new section proposed standard deal expressly passive belts fed reg hold testing procedures required passive belts satisfy act requirement standards objective passive restraint standard technically effect time due sixth circuit invalidation testing requirements see supra issue submitted congress passive restraint requirement reimposed secretary adams comply amendments nhtsa proposed new warning systems replace prohibited continuous buzzers fed reg significantly nhtsa forced rethink earlier decision contemplated use interlocks tandem detachable belts see infra action taken full house representatives senate committee jurisdiction nhtsa affirmatively endorsed standard resolution disapproval tabled senate cong rec judge edwards join majority reasoning points department transportation suggests standard requires minimum rationality statute must bear order withstand analysis due process clause view equivalent presumption constitutionality afforded legislation drafted congress presumption regularity afforded agency fulfilling statutory mandate example overwhelming majority members house representatives voted favor proposal bar nhtsa spending funds administer occupant restraint standard unless standard permitted purchaser vehicle select manual rather passive restraints cong rec nhtsa passive restraint requirement permitted compliance means airbag fed reg rule de facto air bag mandate since technologies available comply standard graham gorham nhtsa passive restraints case arbitrary capricious deregulation ad rev see supra although agency suggested passive restraint systems contain emergency release mechanism allow easy extrication passengers event accident agency cautioned case passive safety belts required release cause belt separation system operation release fed reg april nhtsa adopted suggestion automobile manufacturer emergency release passive belts accomplished conventional latch provided restraint system guarded ignition interlock warning buzzer encourage reattachment passive belt fed reg amendments prohibited devices agency simply eliminated interlock buzzer requirements continued allow compliance detachable passive belt see comments chrysler docket notice app chrysler corp memorandum proposed alternative changes fmvss docket notice app general motors corp response dept transportation proposal occupant crash protection docket notice may app see also chrysler department transportation department transportation expresses concern adoption requirement required new notice proposed rulemaking even need decide question constitute sufficient cause rescind passive restraint requirement department also asserts reasonable withdraw requirement written avoid forcing manufacturers spend resources comply ineffective safety initiative think permissible agency temporarily suspend passive restraint requirement delay implementation date airbag mandate studied explain text option considered passive restraint requirement revoked volkswagen sold approximately rabbits equipped detachable passive seatbelts guarded ignition interlock general motors sold chevettes similar system eliminated ignition interlock chevettes sold nhtsa found belt usage rabbits averaged manual belts passive belts ria app chevettes nhtsa calculated usage manual belts passive belts chevettes agency found figures manual belts passive belts ibid nhtsa believes usage automatic belts rabbits chevettes substantially lower automatic belts cars equipped device inhibiting detachment notice fed reg nhtsa commissioned number surveys public attitudes effort better understand people using manual belts determine react passive restraints surveys reveal public opposed wearing manual belts larger proportion population wear belts forgot found manual belts inconvenient bothersome ria app another survey surveyed group responded welcome automatic belts tolerate see ria app nhtsa comment upon attitude surveys explanation accompanying rescission passive restraint requirement four surveys manual belt usage conducted nhtsa leading agency report people use belts least time ria app appeals noted previous agency statements distinguishing interlocks passive restraints fed reg fed reg ria app petitioners construe appeals order august setting implementation date standard violation vermont yankee injunction imposing time constraints vermont yankee nuclear power natural resources defense council respondents maintain appeals simply stayed effective date standard validly rescinded required mandatory passive restraints new cars september need choose views agency sufficient justification suspend although rescind standard pending consideration required appeals us justice rehnquist chief justice justice powell justice join concurring part dissenting part join parts ii iii iv opinion particular agree since airbag continuous spool automatic seatbelt explicitly approved standard agency rescinding agency explain declined leave requirements intact case agency gave explanation course agency provide rational explanation may adhere decision rescind entire standard believe however nhtsa view detachable automatic seatbelts arbitrary capricious agency adequately explained decision rescind standard insofar satisfied detachable belts statute requires secretary transportation issue motor vehicle safety standards also requires ach standard shall practicable shall meet need motor vehicle safety supp rejects agency explanation conclusion substantial uncertainty whether requiring installation detachable automatic belts substantially increase seatbelt usage agency chose rely study showing substantial increase seatbelt usage cars equipped automatic seatbelts ignition interlock prevent car operated belts place voluntarily purchased equipment consumers see ante reasonable agency decide study support conclusion concerning effect automatic seatbelts installed cars whether consumer wants linked ignition interlock system rejects explanation seem grounds believe seatbelt use occasional users substantially increased detachable passive belts ante agency adequately explain rejection grounds seems agency explanation means model adequate agency acknowledged probably increase belt usage concluded increase small worth cost mandatory detachable automatic belts fed reg agency obligation articulate rational connection facts found choice made ante quoting burlington truck lines believe met standard agency explicitly stated increase educational efforts attempt promote public understanding acceptance use passenger restraint systems fed reg also stated initiate efforts automobile manufacturers ensure public automatic crash protection technology available succeed agency consider regulatory action assure last decade enormous advances crash protection technology lost agency changed view standard seems related election new president different political party readily apparent responsible members one administration may consider public resistance uncertainties important counterparts previous administration change administration brought people casting votes perfectly reasonable basis executive agency reappraisal costs benefits programs regulations long agency remains within bounds established congress entitled assess administrative records evaluate priorities light philosophy administration course new administration may refuse enforce laws approve ignore statutory standards carrying regulatory functions case correctly concludes ante congress required agency require passive restraints