In the 1989 election to the Chamber of Deputies, on 18 June 1989, the party achieved remarkable success by attracting votes from far beyond its core support base. Many Luxembourgers voted for the ADR as a protest vote, allowing the ADR to register 7.3% of the vote, win 4 of the 60 seats, and come fourth. The spectacular triumph of the party in the election required the leadership to formulate a new party strategy. On 12 November 1989, the name was amended to 'Action Committee 5/6ths' ("Aktiounskomitee 5/6"), reflecting its increased attention to other concerns. The party lost one of its deputies, Josy Simon, when he defected to the Democratic Party in spring 1991.