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12Contents34567891011121314151617181920212223242526272829303132333435……363738394041424344454647481...1999.12...1999.13.19952674.1995265.2019984726.19982157.19982258.19982109.199821110.199825911.19982384912.199823413.1999.1.55~5714.1999.1.55~5715.19821[].1986.130-3516..1983252717.19952318.19952519.19952520.[].1986.130355021.[].1986.130-3522.199526423.1995224.[].1995125.199933026.1999.2.9827.1999.155~5728.19547426-427511993329.[]198624030.,198920031.313232.5233.1995265521.19952.2019983.19984.19875.[]198665311.,198912.113.:199714.199754555657AbstractsRebussicstantibuswaslistedinexaminedversionsinthestageofdraftingContractLaw.Butinofficialversionrebussicstantibuswasnotwritteninbecauseofdissensusfromtheoreticalunderstandingofrebussicstantibustoitsactualexecution.Actuallyinordertomaintainsocialeconomicorderitisnecessarytouserebussicstantibustolimitautonomyofcontractualwillandtosolveandcoordinatevariedbenefitcontradiction.Soweshouldpaymuchattentiontotheresearchofrebussicstantibusparticularlyintherespectsoffocuslegalproblemswithwhichisnotagreedbylawresearchers.InviewofthissituationIwritethispaperandwishtoreceiveopinionsfrommyteachersandclassmates.Thispaperincludessevensections.Thefirstistheunderstandingofvalueobjectofrebussicstantibus.Theviewaboutthatvalue58pursuitofrebussicstantibusshouldbefoundedonthebasisofwholesocialbenefitisproposed.Inmyopinionrebussicstantibusshouldstresstherightandjusticebutitsfirstobjectiveshouldbepubliceconomicbenefit.Atthesametimetosomeextentrealisticandhistoricvaluecriterionneedtobenoticedproperlyinordertomaintainlong-termandstablesocialeconomicbenefit.Thesecondisrelatedtocontractualphilosophicalbasisofrebussicstantibus.Inthissectiontheinfluenceofpositivistjurisprudenceneo-naturaljurisprudenceandlegalrealismlawandeconomicsoverthevalueselectionofrebussicstantibusareanalyzed.IthinkwhenresearchingvalueobjectofrebussicstantibuswecannotuseasinglevalueobjectofrebussicstantibustoguidethepracticeoflegislationWeshouldconsidermorecomprehensiveinfluenceofcontractphilosophyandtheresultsofapplicationoftheorytopractice.Contractualphilosophicalbasisofrebussicstantibusshouldbethemixtureofadvantages59ofvariedcontractphilosophywhichhavetheirownreasonablesections.Thethirdisabouttheeffectofrebussicstantibus.Ithinknon-balanceofthebenefittoconcernedpartiescanbedividedtwosectionsundertheconditionofchangeofcircumstancesoneisthatofovermarketrisktheotheristhatofbelowmarketrisk.Whentheformerisintervenedbylawaccordinglythelattershouldbeacknowledged.Effectofrebussicstantibusi.e.changeofcontractexistsonlyonce.Theforthisconcernedwiththedemarcationlinebetweenthechangeofsituationandcommercialrisks.AsfarasIamconcernedwhencircumstanceschangecommercialrisksproduceunderthefollowingpremisesnon-balanceofbenefitwascausedbyautonomyoftheconcernedpartyofcontractsocialbenefitwasnotdamagedorthreatenedeconomicinterestsofwholesocietywasnotdamagedandthetolerantextentofsocialfairviewaboutmarketeconomywasnotsurpassed.Thefifthisrelatedtosuchviewi.e.suitablelegalregulationofchangeof60circumstancesshouldbeprinciplenotinstitutionalizedbecauselegalregulationusedtodealwithchangeofcircumstancesdependonthevalueobjectofrebussicstantibusbutspecificinstitutionalizedregulationortheimprovementofthesystemaboutirresistiblepowercannotbeestablishedtoattainthefinalobject.Thesixthcometotheconclusionthattheprincipleoffrustrationofcontractandrebussicstantibusaredifferentlawsandlieindifferentlegalsystemaccordingtothecomparisonofthechangeofcircumstancesandfrustrationofcontract.Theeffectiveapplicationareonlywithinthesystemoftheirown.Theseventhdefinesthelimitsofrebussicstantibus.Iftraditionaltheoriessuchasthetheoryofimpliedtermareacknowledgedautonomyofcontractfreedomofcontractsmaybelimitedbyfreearbitramentundermanycircumstanceshencetheexecutedpowerofcontractmaybeweakened.Whenrebussicstantibusisdraftedwhichissuitableforactualstatusofourcountrythepresentstatusof61lawsocialeconomypubliclegalsenseshouldbeabsorbedparticularlythetheoryofrebussicstantibusofcivillawsystemshouldbeusedforreference.FinallyIthinkrebussicstantibusofourcountryshouldbedefinedlikethisduringtheperiodfromthedatewhencontractsputintoeffecttothedatebeforecontractsareaccomplishedowingtochangeofsituationwhichisnotledtobytheconcernedpartiesobviouslythemaintenanceoftheoriginaleffectofcontractsisunfairandcandamagepublicbenefitthedamagedpartyhavetherightofrequestingofthecourtthatthecontractsshouldberevised.62636465