pension benefit guaranty ltv argued february decided june title iv employee retirement income security act erisa includes mandatory government insurance program protects workers participating covered pension plans termination plans sufficient funds accumulated pay anticipated benefits program administered petitioner pension benefit guaranty corporation pbgc responsible paying terminated plans unfunded liabilities proceeds annual premiums collected employers maintaining ongoing plans respondent ltv corporation many subsidiaries collectively ltv filed reorganization petitions bankruptcy code purpose inter alia restructuring pension obligations one subsidiaries three chronically underfunded pension plans plans two voluntarily terminated ltv erisa terms resulted negotiations steelworkers america light ltv statement longer provide complete funding pbgc sought involuntary termination plans protect insurance program risk large losses district terminated plans ltv steelworkers negotiated new pension arrangements pbgc characterized plans arrangements designed wrap around pbgc insurance benefits provide substantially benefits received termination occurred pursuant policy considers plans abusive insurance program light perception ltv financial circumstances dramatically improved pbgc issued notice restoration terminated plans erisa authorizes pbgc undo termination case determines action appropriate consistent duties title iv ltv refused comply restoration decision pbgc filed enforcement action district vacated decision upon finding among things pbgc exceeded authority appeals affirmed holding restoration decision various respects arbitrary capricious contrary law administrative procedure act apa held pbgc restoration decision arbitrary capricious contrary law pp pbgc failure consider discuss policies goals underlying federal bankruptcy labor law appeals held render restoration decision arbitrary capricious holding reconciled plain language direct decision public interest generally rather specifically unambiguously requires pbgc focus erisa moreover agency action disturbed whenever reviewing able pinpoint arguably relevant statutory policy explicitly considered large number agency decisions might open judicial invalidation light numerous federal statutes said embody countless goals also pbgc claim expertise labor bankruptcy areas may ill equipped undertake difficult task discerning applying policies goals fields pp pbgc policy contrary law clear congressional intent avoid restoration decisions based existence plans evinced text embodies broad grant authority pbgc legislative history erisa amendments moreover policy based permissible construction rational consistent therefore entitled deference policy premised eminently reasonable belief employees object strenuously company original termination decision plan used put position termination availability plan thus remove employee resistance significant check termination may therefore tend frustrate one erisa objectives pbgc supposed accomplish continuation maintenance voluntary private plans addition plans tendency increase pbgc deficit employers insurance premiums thereby frustrating related erisa objective maintenance low premiums although employer financial improvement may relevant restoration decision respondents contend permissible consideration rational pbgc disfavor plans suggestion immediate retermination rendered necessary employers financial situation pp restoration decision case rendered arbitrary capricious use inadequate procedures since appeals point apa erisa provision giving ltv procedural rights identified appraisal material decision based adequate opportunity offer contrary evidence proceedings accordance ascertainable standards statement showing pbgc reasoning applying standards holding ran afoul vermont yankee nuclear power natural resources defense council moreover since suggestion administrative record inadequate enable fulfill duties holding finds support citizens preserve overton park volpe ltv aided dictum bowman transportation freight system party entitled know issues decision turn apprised factual material agency relies decision may rebut statement made context formal agency adjudication procedures apa require notice factual legal matters asserted opportunity submission consideration facts arguments opportunity submit proposed findings conclusions exceptions determination however lawfully made informal adjudication require elements pp blackmun delivered opinion rehnquist brennan marshall scalia kennedy joined white joined except statement judgment white filed opinion concurring part dissenting part joined post stevens filed dissenting opinion post carol connor flowe argued cause petitioner briefs james armbruster raymond morgan forster thomas martin richard willard charles cole lewis kaden argued cause respondents brief respondents ltv corporation et al karen wagner michael crames marc abrams frank cummings robin phelan kathryn mallory filed brief respondent banctexas dallas joel zweibel geoffrey kalmus michael dell peter pantaleo filed brief respondent ltv bank group king kenneth bruce filed brief respondents david miller et al edgar booth richard kuh mary zitwer filed brief respondent official committee equity security holders leonard rosen lawrence king theodore gewertz harold novikoff brian cogan mark speiser filed brief respondent official committee unsecured creditors ltv steel company william roberts raymond shapiro thomas biron william taylor iii ann laupheimer filed brief respondent official parent creditors committee ltv corporation briefs amici curiae urging reversal filed solicitor general starr deputy solicitor general shapiro christopher wright american society pension actuaries chester salkind armco et al benjamin civiletti warren hamel retired employees benefits coalition bruce davis briefs amici curiae urging affirmance filed state ohio anthony celebrezze attorney general loren braverman american federation labor congress industrial organizations et al robert weinberg jeremiah collins peter shinevar laurence gold bernard kleiman carl frankel paul whitehead karin feldman william kilberg baruch fellner filed brief steel amicus curiae justice blackmun delivered opinion case must determine whether decision pension benefit guaranty corporation pbgc restore certain pension plans employee retirement income security act erisa stat amended stat appeals concluded arbitrary capricious contrary law within meaning administrative procedure act apa petitioner pbgc wholly owned government corporation see modeled federal deposit insurance corporation see cong rec statement bentsen board directors pbgc consists secretaries treasury labor commerce pbgc administers enforces title iv erisa title iv includes mandatory government insurance program protects pension benefits million american workers participate plans covered title enacting title iv congress sought ensure employees beneficiaries completely deprived anticipated retirement benefits termination pension plans sufficient funds accumulated plans pension benefit guaranty corporation gray see also nachman pension benefit guaranty corporation plan covered title iv terminates insufficient assets satisfy pension obligations employees pbgc becomes trustee plan taking plan assets liabilities pbgc uses plan assets cover benefit obligations see ed supp iv pbgc must add funds ensure payment remaining nonforfeitable benefits benefits participants earned entitlement plan terms date termination erisa place limits benefits pbgc may guarantee upon plan termination however even employee entitled greater benefits terms plan see cfr app addition benefit increases resulting plan amendments adopted within five years termination paid full finally active plan participants current employees cease earn additional benefits plan upon termination lose entitlement benefits yet fully earned date plan termination cfr cost pbgc insurance borne primarily employers maintain ongoing pension plans sections erisa require employers pay annual premiums see ed supp iv insurance program also financed statutory liability imposed employers terminate underfunded pension plans upon termination employer becomes liable pbgc benefits pbgc pay pbgc historically recovered small portion liability congress repeatedly forced increase annual premiums even increases pbgc recent annual report noted liabilities billion assets billion leaving deficit billion noted plan termination insurable event title iv plans may terminated voluntarily employer involuntarily pbgc employer may terminate plan voluntarily one two ways may proceed standard termination sufficient assets pay benefit commitments standard termination thus implicate pbgc insurance responsibilities employer wishes terminate plan whose assets insufficient pay benefits employer must demonstrate financial distress defined supp iv neither standard distress termination employer however permitted termination violate terms existing agreement pbgc though may terminate plan involuntarily notwithstanding existence agreement ibid section erisa provides pbgc may terminate plan whenever determines plan met minimum funding standard required section title notified secretary treasury notice deficiency section title mailed respect tax imposed section title plan unable pay benefits due reportable event described section title occurred possible loss pbgc respect plan may reasonably expected increase unreasonably plan terminated case plan terminated section title pbgc authorized case determines action appropriate consistent duties subchapter take action may necessary restore plan pretermination status including limited transfer employer plan administrator control part remaining assets liabilities plan ii case arose respondent ltv corporation ltv many subsidiaries including ltv steel company ltv steel collectively ltv july filed petitions reorganization chapter bankruptcy code time ltv steel sponsor three defined benefit pension plans plans covered title iv erisa two plans products negotiations steelworkers america steelworkers third nonunion salaried employees chronically underfunded plans late unfunded liabilities promised benefits almost billion approximately billion amount covered pbgc insurance undisputed one ltv principal goals filing chapter petitions restructuring ltv steel pension obligations goal accomplished plans terminated responsibility unfunded liabilities placed pbgc ltv steel negotiate employees new pension arrangements ltv however voluntarily terminate plans two negotiated collective bargaining ltv therefore sought pbgc terminate plans end ltv advised pbgc continue provide complete funding plans pbgc estimated without continued funding plans billion underfunding increase much million december another million december unless plans terminated moreover extensive plant shutdowns anticipated shutdowns occurred plans terminated required payment significant shutdown benefits pbgc estimated benefits increase plans liabilities much million million million covered pbgc insurance confronted information pbgc invoking erisa determined plans terminated order protect insurance program unreasonable risk large losses commenced termination proceedings district ltv consent plans terminated effective january plans participants lost benefits result termination steelworkers filed adversary action ltv bankruptcy challenging termination seeking order directing ltv make lost benefits action settled ltv steelworkers negotiating interim agreement included new pension arrangements intended make benefits plan participants lost result termination new payments retirees based explicitly upon percentage difference benefit paid prior plans amount paid pbgc app retired participants thereby placed substantially positions occupied old plans never terminated new agreements respecting active participants also designed replace benefits old plans insured pbgc early retirement benefits shutdown benefits respect shutdown benefits ltv stated bankruptcy new benefits totaled benefits lost result plan termination respect kinds benefits active participants new arrangements provided lost benefits pbgc objected new pension agreements characterizing plans defines plan new benefit arrangement designed wrap around insurance benefits provided pbgc way provide retirees active participants substantially benefits received termination occurred pbgc policy plans stems agency belief plans abusive insurance program result pbgc subsidizing employer ongoing pension program way contemplated title iv pbgc consistently made clear policy using restoration powers employer institutes abusive plan three opinion letters two one pbgc stated termination insurance program title iv intended subsidize employer ongoing retirement program app pet cert accordingly pbgc indicated employer adopts new plan together guaranteed benefits paid pbgc terminated plan provide payment accrual eligibility benefits substantially provided terminated plan app pbgc view plan attempt shift liability termination insurance program continuing operate plan ltv ignored pbgc objections new pension arrangements asked bankruptcy permission fund plans bankruptcy granted ltv request however noted pbgc may legal options avenues assert administratively implement policy goals nothing done tonight precludes pbgc pursuing options early august pbgc determined financial factors relied terminating plans changed significantly particular significance pbgc belief steel industry including ltv steel experiencing dramatic turnaround result pbgc concluded longer faced imminent risk central original termination decision large unfunded liabilities stemming plant shutdowns later month pbgc internal working group made recommendation based upon ltv improved financial circumstances plans pbgc executive director restore plans pbgc powers consulting pbgc board directors agreed working group restoration appropriate executive director decided restore plans director issued notice restoration september indicating pbgc intent restore terminated plans pbgc notice explained restoration decision based ltv establishment retirement program results abuse pension plan termination insurance system established title iv erisa ltv improved financial circumstances see app pet cert restoration meant plans ongoing ltv responsible administering funding ltv refused comply restoration decision prompted pbgc initiate enforcement action district vacated pbgc restoration decision finding among things pbgc exceeded authority see chateaugay sdny appeals second circuit affirmed holding pbgc restoration decision arbitrary capricious contrary law apa various ways first concluded pbgc action arbitrary capricious pbgc focused inordinately erisa exclusion laws found agency policy contrary law legislative history section reveals indication congress intended establishment successive benefit plans ground restoration also found pbgc basis restoration improved financial condition inadequate pbgc explain many economic assumptions finally concluded agency restoration decision arbitrary capricious pbgc decisionmaking process informal adjudication lacked adequate procedural safeguards significant administrative law questions raised case importance pbgc insurance program granted certiorari iii appeals first held restoration decision arbitrary capricious pbgc take account areas law deemed relevant restoration decision expressed view ecause erisa bankruptcy labor law involved case hand must showing administrative record pbgc reaching decision considered areas law extent possible honored policies underlying concluded administrative record reflect thorough explicit consideration pbgc policies goals three bodies law put pbgc focused inordinately erisa ibid appeals hold pbgc decision actually conflicted provision bankruptcy labor laws pbgc action trench ed upon jurisdiction another agency see burlington truck lines rather held labor law bankruptcy law involved case hand pbgc affirmative obligation met address pbgc contends appeals misapplied general rule agency must take consideration relevant factors see citizens preserve overton park volpe requiring agency explicitly consider discuss labor bankruptcy law agree first important think requirement imposed appeals upon pbgc reconciled plain language pbgc operating case section gives pbgc power restore terminated plans case pbgc determines action appropriate consistent duties title title iv erisa emphasis added statute direct pbgc make restoration decisions public interest generally rather empowers agency restore restoration interests title iv erisa designed protect given specific unambiguous statutory mandate think pbgc focus inordinately erisa making restoration decision even congress directive pbgc clear entirely sure appeals holding makes good sense general principle administrative law pbgc points problems arise federal courts routinely require agency take explicit account public policies derive federal statutes agency enabling act begin numerous federal statutes said embody countless policies agency action may disturbed whenever reviewing able point arguably relevant statutory policy explicitly considered large number agency decisions might open judicial invalidation appeals directive pbgc give effect policies goals statutes apart statutes actually provide questionable another reason well pbgc claim expertise labor bankruptcy areas may ill equipped undertake difficult task discerning applying policies goals fields recently observed legislation pursues purposes costs deciding competing values sacrificed achievement particular objective essence legislative choice frustrates rather effectuates legislative intent simplistically assume whatever furthers statute primary objective must law rodriguez appeals also rejected grounds restoration pbgc assert discuss found first ground pbgc proffered support restoration policy plans contrary law indication text restoration provision legislative history congress intended pbgc use successive benefit plans basis restoration pbgc argues reaching conclusion appeals departed traditional principles statutory interpretation judicial review agency construction statutes must agree chevron natural resources defense council set forth general principles applied federal courts review agency interpretation statute implements reviews agency construction statute administers confronted two questions first always question whether congress directly spoken precise question issue intent congress clear end matter well agency must give effect unambiguously expressed intent congress however determines congress directly addressed precise question issue simply impose construction statute necessary absence administrative interpretation rather statute silent ambiguous respect specific issue question whether agency answer based permissible construction statute footnotes omitted turning first half inquiry observe text evince clear congressional intent deprive pbgc ability base restoration decisions existence plans contrary textual grant authority pbgc embodied section broad noted section authorizes pbgc restore terminated plans case pbgc determines action appropriate consistent duties title iv erisa pbgc duties consist primarily furthering statutory purposes title iv identified congress encourage continuation maintenance voluntary private pension plans benefit participants provide timely uninterrupted payment pension benefits participants beneficiaries plans subchapter applies maintain premiums established pbgc section title lowest level consistent carrying obligations subchapter traditional tools statutory construction compel conclusion congress intended pbgc base restoration decisions plans appeals relied extensively passages legislative history enactment erisa suggest congress considered financial recovery valid basis restoration make mention plans reasoned among bases restoration discussed members congress body must intended existence reason restoring pension plans see agree conclusion first note discussion legislative history concerning grounds restoration limited example house conference report indicated restoration appropriate financial recovery factor made termination longer advisable conf moreover generally language statute particularly language expressly granting agency broad authority regarded modified examples set forth legislative history example illustration statute operation practice appeals apparently thought definitive interpretation statute scope see suggestion legislative history congress intended list examples exhaustive circumstances conclude erisa legislative history suggest clear congressional intent question plans appeals also relied legislative history amendments erisa effected pension protection act pub stat see history reveals congress considered enact provision expressly authorized pbgc prohibit plans subsequent legislative history hazardous basis inferring intent earlier congress price particularly dangerous ground rest interpretation prior statute concerns proposal become law see wise congressional inaction lacks persuasive significance several equally tenable inferences may drawn inaction including inference existing legislation already incorporated offered change ibid admonitions especially apt instant case congress aware action taken pbgc respect ltv time rejected proposed amendment see pt pp despite congress awareness pbgc belief adoption plans ground restoration congress amend restrict pbgc discretion conclusion congress thought pbgc properly exercising authority least plausible thus legislative history surrounding amendments provides support legislative history appeals holding pbgc interpretation contravened clear congressional determined pbgc construction contrary clear congressional intent still must ascertain whether agency policy based upon permissible construction statute construction rational consistent statute nlrb food commercial workers see also sullivan everhart respondents argue pbgc policy irrational practical matter purpose served pbgc bases restoration decision something improved financial health employer according respondents financial improvement necessary sufficient condition restoration agency asserted abuse policy logically irrelevant restoration decision brief respondents ltv ltv steel emphasis added think pbgc policy premised belief find eminently reasonable employees object strenuously company original decision terminate plan take financial steps make termination likely company use plan put employees similar position termination availability plan thus remove significant check employee resistance termination pension plan consequently plans may tend frustrate one objectives erisa pbgc supposed accomplish continuation maintenance voluntary private pension plans addition plans tendency increase pbgc deficit increase insurance premiums employers must pay thereby frustrating another related statutory objective maintenance low premiums see short pbgc construction based upon conclusion existence plans lead plan terminations increased pbgc liabilities assuredly permissible one everhart indeed judgments way real world works gone pbgc policy precisely kind agencies better equipped make courts practical agency expertise one principal justifications behind chevron deference see none say financial improvement never relevant restoration decision indeed employer financial situation remains dire restoration lead inevitably immediate retermination pbgc may decide restore terminated plan even employer instituted plan present purposes however enough us decide suggestion immediate retermination plans necessary rational pbgc disfavor plans finally consider appeals ruling agency procedures inadequate particular case relying upon passage bowman transportation freight system held pbgc decision arbitrary capricious pbgc neither apprised ltv material base decision gave ltv adequate opportunity offer contrary evidence proceeded accordance ascertainable standards provided ltv statement showing reasoning applying standards suggested remand agency required things pbgc argues holding conflicts vermont yankee nuclear power natural resources defense council pbgc contends made clear due process clause implicated agency governing statute contains specific procedural mandates apa establishes maximum procedural requirements reviewing may impose agencies although vermont yankee concerned additional procedures imposed appeals district columbia circuit atomic energy commission agency engaging informal rulemaking pbgc argues informal adjudication process restoration decision made governed principles respondents counter arguing courts circumstances require agencies undertake additional procedures support proposition rely citizens preserve overton park volpe overton park concluded secretary transportation post hoc rationalizations regarding decision authorize construction highway provide dequate basis judicial review purposes apa accordingly directed district remand consider evidence shed light secretary reasoning time made decision particular relevance present purposes overton park intimated one recourse district might remand agency fuller explanation agency reasoning time agency action see subsequent cases made clear remanding agency fact preferred course see florida power light lorion reviewing simply evaluate challenged agency action basis record proper course except rare circumstances remand agency additional investigation explanation respondents contend instant case controlled overton park rather vermont yankee appeals ruling thus correct believe respondents argument wide mark begin noting although one initially might feel tension vermont yankee overton park two cases necessarily inconsistent vermont yankee stands general proposition courts free impose upon agencies specific procedural requirements basis apa see overton park suggests directs ensure agency action arbitrary capricious otherwise contrary law imposes general procedural requirement sorts mandating agency take whatever steps needs provide explanation enable evaluate agency rationale time decision unlike overton park appeals suggest administrative record inadequate enable fulfill duties rather support ruling focused fundamental fairness ltv possible exception absence ascertainable standards exactly sure appeals meant procedural inadequacies cited relate ltv role pbgc decisionmaking process point provision erisa apa gives ltv procedural rights identified thus holding runs afoul vermont yankee finds support overton park case appeals relied contrary statement relied upon dictum said party entitled course know issues decision turn apprised factual material agency relies decision may rebut statement entirely correct context involved formal adjudication interstate commerce commission pursuant procedures set forth apa include requirements parties given notice matters fact law asserted opportunity submission consideration facts arguments opportunity submit proposed findings conclusions exceptions see stat stat formerly codified ed repealed stat stat determination case however lawfully made informal adjudication minimal requirements set forth apa include elements failure provide due process clause require asserted therefore unlawful iv conclude pbgc failure consider potentially relevant areas law render restoration decision arbitrary capricious also conclude pbgc policy asserted basis restoration decision contrary clear congressional intent based permissible construction finally find procedures employed pbgc consistent apa accordingly judgment appeals reversed case remanded proceedings consistent opinion ordered footnotes prior employers liable pbgc expenditures year congress eliminated cap see pension protection act pub stat steelworkers appealed district judgment giving effect pbgc termination appeals second circuit affirmed jones laughlin hourly pension plan ltv thereafter executive director offered meet ltv consider additional information might wish supply app representatives ltv pbgc met september meetings ltv officials expressed concern timing restoration decision indicated restoration give rise litigation cast doubt bankruptcy reorganization thereby imposing hardship creditors pbgc also gave third reason restoration ltv demonstrated willingness fund employee retirement arrangements see app pet cert appeals second circuit pbgc conceded reason independent basis restoration decision rather subsumed two grounds see accordingly appeals address explanation restoration neither meanwhile ltv filed action bankruptcy alleging restoration violate automatic stay provision bankruptcy code see district granted pbgc motion withdraw ltv action bankruptcy pursuant considered two actions together see chateaugay sdny worth noting provisions erisa take account areas federal law example noted employer may voluntarily terminate plan violate terms agreement justice stevens suggests possibility plans make employees less likely object financial steps lead involuntary plan termination basis belief union insist adoption plans perhaps years later pbgc involuntarily terminates plan post dissenting opinion reason believe however financial decisions lead involuntary termination always ordinarily occur far advance termination thus justice stevens acknowledges respect voluntary termination object events resulting involuntary termination may also reasonably assured receiving benefits insurance paid ibid moreover even involuntary termination occur well financial decisions lead termination made think pbgc apparent belief employee resistance financial decisions lessened degree prospect plans termination unreasonable one example pbgc restore fourth ltv plan terminated among things plan insufficient assets pay benefits due app respect observe notice restoration pbgc relied potential pbgc liability see pbgc conclude plans imminent danger ltv meet statutory requirements fact pbgc observed notice ltv sufficient cash cover current benefits see app pet cert party suggested time restoration immediate retermination either voluntary involuntary likely like appeals read pbgc notice restoration indicating pbgc policy constitutes independent ground restoration decision need address ruling pbgc methodology regard asserted basis restoration improved financial condition flawed justice white justice joins concurring part dissenting part join opinion except statement judgment particular agree policy issue contrary statute pbgc prohibited applying policy basis restoration case unlike however read notice restoration relying policy respondents alleged improved financial position alternative independent grounds restoration notice read clearly rested grounds conjunction furthermore make good sense rely improved financial position without risk early retermination plan least serious doubt matter appeals correct pbgc assessment respondents financial position inadequate think case remanded agency consider whether plan provides sufficient grounds restoration order realize pbgc represented oral argument relied policy respondents improved financial condition separate independent grounds restoration tr oral arg counsel post hoc rationalizations substitute adequate action agency see motor vehicle mfrs assn state farm mutual automobile insurance may pbgc restoration order upheld even though agency might reach result remand relying policy agency action must measured might done agency action upheld merely findings might made considerations disclosed justify order appropriate safeguard interests protected act sec chenery therefore reverse appeals part affirm part remand directions return case pbgc justice stevens dissenting opinion least respect erisa plans pbgc terminated involuntarily use restoration power prohibit plans contrary agency statutory mandate unless sufficient improvement ltv financial condition justify restoration order believe set aside therefore remand case determination whether ground agency decision adequately supported record company undergoing reorganization chapter bankruptcy code continues operate ongoing business must satisfactory relationship work force order complete reorganization process successfully previous pension plans involuntarily terminated consequence pbgc assumed responsibility discharging significant share company pension obligations responsibility pbgc important resource company right rely reorganization process may use financial cushion fund capital investments pay current salary satisfy contractual obligations including obligation pay pension benefits long company uses best efforts complete reorganization incidentally reimburse pbgc payments made former employees extent required erisa pbgc reason interfere managerial decisions company makes bankruptcy approves whether company resources dedicated current expenditures capital investments whether package employee benefits provided work force composed entirely wages vacation pay health insurance one hand includes additional pension benefits matters indifference pbgc indeed faithful statement congressional purposes erisa see ante favor alternative increases company use maintenance pension plans provides continued payment existing plan beneficiaries plans opinion wholly consistent purposes erisa according pbgc policy premised belief company adopt plan employees object strenuously case voluntary termination company original decision terminate plan case involuntary termination company decision take financial steps make termination likely ante belief might justified case voluntary termination erisa plan since plan adopted immediately plan termination object insurable event also reasonably assured receiving benefits insurance paid view wholly unwarranted however case involuntary termination insurable event plan termination within control pbgc presumably determined company financial resources meet current pension obligations even company adopt plan employees less likely object financial steps lead plan termination basis belief union insist course perhaps years later pbgc involuntarily terminates plan safety comes healthy pension plan overcome hope future union remember interests retirees former employees plan restoration circumstances legitimate curative problem moral hazard rather constitutes punishment labor management imprudence predecessors case involuntary termination mistake financial analysis made sufficient change financial condition company justify reinstatement company obligation pbgc use restoration powers without financial justification however nothing statute authorize pbgc use power prevent company creating maintaining kind employee benefit program statute enacted encourage accordingly respectfully dissent time termination ltv plans pbgc entitled recover percent amounts expended discharge ltv pension obligations statute since amended authorize percent recovery ltv represents restoration order upheld seems highly probable promptly followed another termination pbgc bankruptcy claim increase billion billion brief respondents ltv ltv steel pbgc course assert change justification restoration order three opinion letters identifying pbgc policy concerning plans involved voluntary terminations see app pet cert restoration order entered case unprecedented