Since the convening of the World Summit for Social Development in Copenhagen in 1995, the Commission has been the key UN body in charge of the follow-up and implementation of the Copenhagen Declaration and Programme of Action. As a result of the Summit, the mandate of the Commission was reviewed and its membership expanded from 32 to 46 members in 1996. It meets once a year at the United Nations Headquarters in New York City, usually in February for about two weeks.