 She also was chairperson of the "Joint Committee" ("Gemeinsamer Ausschuss nach Artikel 53a des Grundgesetzes").Following the 1976 federal election, the Christian Democratic Union (CDU) and its sister party, the Christian Social Union in Bavaria (CSU) regained plurality in the Bundestag, and Karl Carstens followed Annemarie Renger as President of the Bundestag.Renger was elected Vice President of the Bundestag and served in this function until her resignation from the Bundestag prior to the 1990 federal election.