lorance technologies argued march decided june agreements respondents technologies local international brotherhood electrical workers determined worker seniority basis years plantwide service plantwide seniority transferable upon promotion skilled tester position new agreement executed changed making seniority tester jobs dependent upon amount time spent tester petitioners women employees promoted tester positions received demotions sustained former seniority system remained place filed charges equal employment opportunity commission receiving letters filed present action district alleging respondents violated title vii civil rights act adopting new seniority system purpose effect protecting incumbent testers jobs traditionally dominated men female employees greater plantwide seniority becoming testers increasing numbers granted summary judgment respondents ground charges filed within required period alleged unlawful employment practice occurred title vii appeals affirmed held title vii operation seniority system disparate impact men women unlawful unless discriminatory intent proved swint american tobacco patterson trans world airlines hardison disputed seniority system issue facially nondiscriminatory treats similarly situated employees alike nondiscriminatorily applied alleged invalidity rests claim intentional discrimination produced unfavorable change petitioners contractual seniority rights respondents adopted new system limitations period therefore commenced point delaware state college ricks air lines evans rule strikes balance interest valid claims vindicated interest adjudicating stale claims heightened context special reliance interests protected seniority systems pp affirmed scalia delivered opinion rehnquist white stevens kennedy joined stevens filed concurring opinion post marshall filed dissenting opinion brennan blackmun joined post took part consideration decision case barry goldstein argued cause petitioners briefs julius levonne chambers bridget arimond patrick patterson charles shanor argued cause et al amici curiae urging reversal brief solicitor general fried deputy solicitor general ayer richard lazarus gwendolyn young reams donna brusoski david carpenter argued cause respondents brief rex lee patrick casey gerald skoning charles jackson michael gottesman robert weinberg joel stephen feinberg robert williams douglas mcdowell katrina grider filed brief equal employment advisory council amicus curiae urging affirmance justice scalia delivered opinion respondent technologies manufactures electronics products montgomery works plant three petitioners women worked hourly wage employees facility since early represented respondent local international brotherhood electrical workers hourly wage earners accrued competitive seniority exclusively basis years spent plant worker promoted highly skilled better paid tester positions retained plantwide seniority agreement executed respondents july altered manner calculating tester seniority thenceforth tester seniority determined length plantwide service time actually spent tester though possible regain full plantwide seniority spending five years tester completing prescribed training program present action arises contractual modification petitioners became testers economic downturn low seniority agreement caused selected demotion demoted former plantwide seniority system remained place claiming present seniority system product intent discriminate basis sex petitioners filed complaints equal employment opportunity commission eeoc april eeoc issued letters petitioners september filed present lawsuit district northern district illinois sought certification class representatives women employees montgomery works plant lost plantwide seniority new system deterred seeking promotions tester positions complaint alleged among hourly wage earners tester positions traditionally held almost exclusively men nontester positions principally women increasing number women took steps necessary qualify tester positions exercised seniority rights become testers claimed alteration rules governing tester seniority product conspir acy change seniority rules order protect incumbent male testers discourage women promoting tester jobs purpose effect manipulation seniority rules protect male testers effects female testers greater plant seniority discourage women entering tester jobs app august deciding whether certify proposed class district granted respondents motion summary judgment ground petitioners filed complaints eeoc within applicable limitations period fep cases divided panel appeals seventh circuit affirmed concluding petitioners claims time barred relevant discriminatory act triggers period limitations occurs time employee becomes subject facially neutral discriminatory seniority system employee knows reasonably know discriminatory granted certiorari resolve circuit conflict limitations period begins run lawsuit arising seniority system alleged discriminatory face presently applied compare case cook pan american world airways cert denied section title vii civil rights act stat amended provides charge shall filed eeoc within applicable period alleged unlawful employment practice occurred assessing timeliness therefore requires us identify precisely unlawful employment practice petitioners complai delaware state college ricks title vii unlawful employment practice employer discriminate individual respect compensation terms conditions privileges employment individual race color religion sex national origin limit segregate classify employees applicants employment way deprive tend deprive individual employment opportunities otherwise adversely affect status employee individual race color religion sex national origin notwithstanding provision subchapter shall unlawful employment practice employer apply different standards compensation different terms conditions privileges employment pursuant bona fide seniority system provided differences result intention discriminate race color religion sex national origin petitioners allege seniority system treats similarly situated employees differently operated intentionally discriminatory manner rather claim differential impact sexes unlawful system ha genesis sex discrimination teamsters specifically complaint alleges respondents conspired change seniority rules order protect incumbent male testers resulting agreement effected manipulation seniority rules purpose see app emphasis added essence claim intentionally discriminatory alteration contractual rights seniority contractual right aaron reflections legal nature enforceability seniority rights harv rev competitive seniority system establishes hierarchy rights according various employment benefits distributed franks bowman transportation agreements effect prior petitioner earned right receive favorable position hierarchy seniority among testers became tester respondents eliminated rights reasons alleged discriminatory diminution employment status occurred well outside period limitations complaint filed eeoc seventh circuit correct find petitioners claims time barred recognize course possible establish different theoretical construct regard employer guilty continuing violation occurred purposes contractual right eliminated also concrete effects elimination felt possible interpret fashion proviso met provided differences result intention discriminate race color religion sex national origin subsection protection becomes unavailable nothing prevents suits later effects system grounds answer alternative approaches cases rejected continuing violation theory contradicted clearly two decisions delaware state college ricks air lines evans ricks treated allegedly discriminatory denial tenure rather resulting nondiscriminatory termination employment one year later act triggering limitations period ricks claim manner employment terminated differed discriminatorily manner college terminated professors also denied tenure held alleged discrimination occurred filing limitations periods therefore commenced time tenure decision made communicated ricks found even though one effects denial tenure eventual loss teaching position occur later ibid emphasis original concluded proper focus upon time discriminatory acts upon time consequences acts became painful ibid emphasis original accord chardon fernandez per curiam evans air lines discriminatorily dismissed plaintiff worked several years flight attendant rehired years later gave seniority credit earlier service evans conceded discriminatory dismissal time barred claimed seniority system impermissibly gave present effect past act discrimination agreeing assessment concluded challenge neutral system may predicated mere fact past event present legal significance affected calculation seniority credit even past event might one time justified valid claim employer like evans petitioners present case asserted claim wholly dependent discriminatory conduct occurring well outside period limitations complain continuing violation second alternative theory mentioned view merely providing affirmative defense cause action brought rather making intentional discrimination element title vii action challenging seniority system availability affirmative defense alter fact claim asserted one discriminatory impact causing statute limitations run time impact felt original matter plausible perhaps even natural reading construed deals bona fide occupational qualifications fashion see dothard rawlinson interpretation foreclosed cases treat proof discriminatory intent necessary element title vii actions challenging seniority systems least concerns seniority plans regarded subsection defense illegality described subsection provision delineates employment practices illegal thereby prohibited franks thus american tobacco determined mean fact seniority system discriminatory impact alone sufficient invalidate system actual intent discriminate must proved emphasis added cognizable held claim seniority system discriminatory impact must accompanied proof discriminatory purpose emphasis added accord hardison indeed california brewers assn bryant deciding challenged policy part seniority system noted remand district plaintiff remain free show seniority system bona fide differences employment conditions produced result intention discriminate race thus petitioners claim depends proof intentionally discriminatory adoption system occurred outside limitations period case machinists nlrb establishes limitations period run date system adopted least adoption occurred effective date title vii cause action available machinists decision national labor relations act nlra often observed nlra model title vii remedial provisions found cases interpreting former persuasive construing latter see ford motor eeoc teamsters franks supra albemarle paper moody reliance particularly appropriate context presented since highly unusual feature requiring administrative complaint civil action filed private party common two statutes nlra statute limitations provides complaint shall issue based upon unfair labor practice occurring six months prior filing charge board even substantively similar charge shall filed eeoc within one hundred eighty days alleged unlawful employment practice occurred zipes trans world airlines specifically relied cases construing nlra timely filing requirement determining whether provision construe constituted waivable statute limitations rather jurisdictional prerequisite title vii action time requirement filing unfair labor practice charge national labor relations act operates statute limitations subject recognized equitable doctrines restriction jurisdiction national labor relations board said time limitations title vii treated likewise citations omitted machinists considered rejected approach limitations period identical advanced suit involved timeliness unfair labor practice complaint directed union security clause required employees join union within days contract execution nlrb precedents agreeing clause union lacked majority status constituted unfair labor practice continued enforcement clause agreement issue machinists adopted six months complaint issued outside limitations period enforced well within period limitations conceding complaint predicated execution agreement challenged barred limitations nlrb contended complaint nonetheless timely since based upon parties continued enforcement within period limitations union security clause emphasis original found however entire foundation unfair labor practice charged union lack majority status original agreement signed absence fact enforcement otherwise valid union security clause wholly benign complaint based upon earlier event reasoned permit event cloak illegality otherwise lawful effect results reviving legally defunct unfair labor practice ibid analysis squarely point claimed invalidity facially nondiscriminatory neutrally applied tester seniority system wholly dependent alleged illegality signing underlying agreement date signing governs limitations period holding seniority system nondiscriminatory form application allegedly discriminatory adoption triggers limitations period respect general value judgment concerning point interests favor protecting valid claims outweighed interests prohibiting prosecution stale claims ricks citation omitted also considerations underlying special treatment accorded seniority systems see hardison special treatment strikes balance interests protected discrimination title vii work perhaps many years reliance upon validity facially lawful seniority system doubt course facially discriminatory seniority system one treats similarly situated employees differently challenged time even facially neutral system adopted unlawful discriminatory motive challenged within prescribed period adoption allowing facially neutral system challenged entitlements altered many years adoption disrupt valid reliance interests meant protect context present case female tester defeat settled expectations whenever demoted promoted new system beyond indeed given plaintiff theory sue successively promoted demoted laid awarded sufficiently favorable pension long acts even nondiscriminatory attributed change seniority past cases adhere today declined follow approach disruptive implications affirmed footnotes charge must filed eeoc within days alleged unfair employment practice unless complainant first instituted proceedings state local agency case period extended maximum days neither district appeals ruled applicable limitations period present case since courts concluded petitioners claims time barred even applicable period days see may reason avoid ruling point dissent attempts distinguish delaware state college ricks ground allegedly discriminatory denial tenure served notice plaintiff termination year later come delayed inevitable consequence post emphasis original citation omitted builds earlier criticism day seniority system adopted reason believe woman exercised plantwide seniority become tester ever demoted result new system point prospect petitioners suffering concret harm speculative post emphasis original course benefits seniority system like insurance policy payable upon occurrence noninevitable event nature speculative depend upon employee continuing desire work particular employer makes sense say concrete harm occurs employer provides patently less desirable seniority guarantee law requires say concrete harm occurs insurance company delivers accident insurance policy face value paid face value true injury employee becomes substantially concrete less desirable seniority system causes demotion injury policyholder becomes substantially concrete accident occurs payment less irrelevant whether concrete injury outset dissent means concrete harm ricks referred point injury becomes painful case rejected point reference liability accord chardon fernandez per curiam like ricks air lines evans decision machinists nlrb also rejected attempt cure untimeliness asserting continuing violation applicability principles avoided invoking doctrine continuing violation may conceded continued enforcement well execution collective bargaining agreement constitutes unfair labor practice two logically separate violations independent sense described discrete terms nevertheless vice enforcement agreement manifestly independent legality execution case example agreement invalid face one validly executed unlawfully administered dissent mistaken equate application facially neutral discriminatorily adopted system application system facially discriminatory see post facially neutral system discriminatory act occurs time adoption application nondiscriminatory seniority accrues men women identical basis facially discriminatory system one assigns men twice seniority women receive amount time served definition discriminates time applied material difference purposes analysis employed evans ricks focuses timing discriminatory acts purposes statute limitations also dissent citation post bazemore friday ach week paycheck deliver ed less black similarly situated white misplaced justice stevens concurring although remain convinced misconstrued title vii american tobacco patterson see dissenting opinion delaware state college ricks see dissenting opinion correctly applied decisions case hand construction statute rather views individual justice becomes part law see johnson transportation agency santa clara county stevens concurring dougherty county bd education white stevens concurring accordingly join opinion justice marshall justice brennan justice blackmun join dissenting majority holds today alleged employer union negotiated adopted new seniority system intention discriminating women violation title vii et limitations period set forth begins run immediately upon adoption system ante even employee subsequently challenges system reasonably expected demoted otherwise concretely harmed new system time adoption indeed even employee working affected division company time system adoption severe interpretation come surprise congress whose goals enacting title vii surely never included conferring absolute immunity discriminatorily adopted seniority systems survive first days harsh reality today decision requiring employees sue anticipatorily forever hold peace glaringly odds purposes title vii compelled neither text statute precedents interpreting respectfully dissent facts case illustrate austere practical consequences majority holding day seniority system adopted reason believe woman exercised plantwide seniority become tester ever demoted result new system indeed new system five years woman tester regain plantwide seniority intervening five years potentially endangered patricia lorance already tester new system adopted almost made four years tester demoted terms new system new system concretely harm petitioners janice king carol bueschen even speculative became testers several months seniority system modified like lorance adversely affected restructured seniority system indeed absent nationwide recession early petitioners might never affected today however majority concludes women barred bringing suit failed anticipate within days new system adoption contingencies one day place among new system casualties nothing text title vii compels result contrary even majority concedes plausible reading title vii regard employer violated wing statute time system adoption also concrete effect system felt ante see also describing interpretation logically appealing continuing violation theory time discriminatory seniority system applied like time discriminatory salary structure applied independent unlawful employment practice takes place triggering limitations period anew see bazemore friday week paycheck delivers less black similarly situated white wrong actionable title vii cf havens realty coleman challenged violation continuing one staleness concern disappears viewing application discriminatory system new violation serves equal opportunity goals title vii ensuring victims discrimination prevented day today decision latest example flouting intent congress gradually diminished application title vii seniority systems first held requires special treatment bona fide seniority systems title vii absent discriminatory purpose operation seniority system unlawful employment practice even system discriminatory consequences trans world airlines hardison see also swint held narrow margin protects even seniority systems put place passage title vii american tobacco co patterson majority contends result reaches today dictated precedents involving seniority systems view today decision compounds prior decisional errors giving unnecessarily broad scope extension particularly inappropriate forces reach bizarre impractical result never held even intimated context statute limitations inquiry one must evaluate challenges seniority system born discriminatory intent moment adoption indeed held majority concession worker may time challenge facially discriminatory seniority plan flatly contradicted precedent ante discriminatory intent goes creation even facially flawed seniority plan different discriminatory intent informs creation facially neutral one impute ongoing intent former situation latter untenable distinction majority erects today serves reward employers ingenious enough cloak acts discrimination facially neutral guise identical though effects system may facially discriminatory one neither air lines evans delaware state college ricks majority premises rejection continuing violation theory compels today result evans unlike instant case plaintiff never alleged seniority system set order discriminate indeed observed evans attack bona fides seniority system makes charge system intentionally designed discriminate see also sole discrimination alleged evans plaintiff prior discharge impact alleged enhanced upon return work failure seniority system accord credit time served discharged denying challenge system held challenge neutral system may predicated mere fact past event evan prior discharge present legal significance affected calculation seniority credit holding plainly inapposite essence petitioners claim discriminatorily adopted seniority system neutral thus majority conclusion past event cited case discriminatory adoption seniority system legal challenge present legal significance quoted ante ipse dixit ricks likewise inapposite allegedly discriminatory denial tenure case served notice plaintiff termination year later come delayed inevitable consequence emphasis added thus appropriate many areas involving statutes limitations doctrine set limitations clock running upon plaintiff discovery harm petitioners lorance king bueschen however given advance warning majority holds limitations clock began running ran long apparent demoted discriminatory system like evans ricks stands proposition neutral employment practices passively perpetuate consequences prior discrimination bred discriminatory intent constitute actionable wrongs title vii neither case suggests operation seniority system set order discriminate treated way legitimate seniority tenure system born nondiscriminatory motives particular case may effect passively reinforcing prior acts discrimination finally correct say machinists nlrb establishes limitations period run date system adopted ante therefore controls case initially bears mention machinists arose different statute national labor relations act nlra machinists involve seniority system instead union security clause alleged defectively adopted significant though role nlra model title vii remedial provisions hardly indicia controlling precedent moreover sound reasons support finding time bar machinists time bar machinists ricks enforcement challenged security clause inevitable consequence execution clause affected nonunion employees alike inception mystery employees affected impact contrast case essence petitioners claim new seniority system designed discriminatory impact hurting women employees group time inception theoretically hurting particular woman employees unlike machinists indication anyone employed limitations period chosen majority tangibly affected new plan create incentive sue majority today continues process immunizing seniority systems requirements title vii addition hurdles previously put place employees must anticipate initiate suit prevent future adverse applications seniority system matter speculative unlikely applications may observation limitations periods commence run soon becomes difficult layman invoke protection civil rights statutes ricks supra increasingly hollow ring believe congress framing title vii even remotely contemplated putting employees predicament majority today makes inevitable dissent case complaint previously filed state local agency systems survive first days ante remains astonishing seniority systems sheltered claims see teamsters opinion marshall even majority concedes original matter plausible perhaps even natural reading regards subsection merely providing affirmative defense action brought ante even accepting precedents believe majority prohibit finding petitioners made timely colorable claim disparate impact trans world airlines hardison held bona fide seniority systems exempted claims accepting true petitioners allegation union restructured seniority system discriminatory reasons system qualify bona fide one entitled immunity claims tellingly none courts appeals presented claim continuing violation reached result majority today reaches indeed two courts appeals interpreted precedents permit claims continuing violation cook pan american world airways cf johnson general electric even seventh circuit finding petitioners claim time barred judgment review adopted far narrower interpretation majority limitations period begins run date employee first becomes subject seniority system