A tsakiyar shekarun 1970s, akwai manyan gyare-gyare na House, ƙarfafa ikon kwamitocin kwamitocin a kan kujerun kwamitocin da kuma ba da damar shugabannin jam'iyyun su zabi shugabannin kwamitocin. An dauki waɗannan matakan ne don raunana tsarin tsofaffi, da kuma rage ikon ƙananan 'yan majalisa don hana dokoki da ba su so. Akwai kuma sauyawa daga shekarun 1990 zuwa mafi girma na kula da shirin majalisa ta hanyar mai magana da jam'iyyar jam'iyyar; ikon shugabannin jam'iyyar (musamman) Tambaya: Me ya sa akwai manyan gyare-gyare a tsakiyar shekarun 1970s?
don rage tsarin tsofaffi, da kuma rage ikon ƙananan 'yan majalisa don hana dokoki