▁Professional ▁Res p ons ibility ▁( prom ul g ated ▁ 1 9 6 9 ) ▁was ▁a ▁failure . ▁In ▁ 1 9 8 3 ▁it ▁replaced ▁it ▁with ▁the ▁Model ▁R ules ▁of ▁Professional ▁Con duct . ▁The ▁MR PC ▁have ▁been ▁adopted ▁in ▁part ▁or ▁in ▁whole ▁by ▁ 4 9 ▁states ▁( and ▁is ▁being ▁considered ▁by ▁the ▁last ▁one , ▁California ). ▁Its ▁pre am ble ▁contains ▁an ▁em ph atic ▁rem inder ▁that ▁the ▁legal ▁profession ▁can ▁remain ▁self - g over ning ▁only ▁if ▁law y ers ▁behave ▁properly . ▁Second , ▁the ▁A BA ▁prom ul g ated ▁a ▁requirement ▁that ▁law ▁students ▁at ▁A BA - appro ved ▁law ▁schools ▁take ▁a ▁course ▁in ▁professional ▁responsibility ▁( which ▁means ▁they ▁must ▁study ▁the ▁MR PC ). ▁The ▁requirement ▁remains ▁in ▁effect . ▁ ▁On ▁June ▁ 2 4 ▁and ▁ 2 5 , ▁ 1 9 7 5 , ▁N ixon ▁gave ▁secret ▁testim ony ▁to ▁a ▁grand ▁j ury . ▁According ▁to ▁news ▁reports ▁at ▁the ▁time , ▁N ixon ▁answered ▁questions ▁about ▁the ▁- min ute ▁t ape ▁gap , ▁alter ing ▁White ▁House ▁t ape ▁trans cript s ▁turned ▁over ▁to ▁the ▁House ▁Jud ici ary ▁Committee , ▁using ▁the ▁In ternal ▁Re venue ▁Service ▁to ▁har ass ▁political ▁enemies , ▁and ▁a ▁$ 1 0 0 , 0 0 0 ▁contribution ▁from ▁billion aire ▁Howard ▁Hugh es . ▁A ided ▁by ▁the ▁Public ▁Cit izen ▁Lit ig ation ▁Group ,