The group's authorizing legislation () provided that the Commission draw its membership from the Senate and from experts in the private sector. Specifically, the group was to be composed of 12 members, seven Members of the U.S. Senate appointed by the
President of the Senate, and five members from the private sector appointed by the
President of the United States. Four of the seven Senators, including one designated as chair, were to be selected from the majority party after consultation with the
Majority Leader, and three, including the Member designated as co-chair, were to be selected from the minority party, after consultation with the
Minority Leader. The five Commission members selected from the private sector were to be appointed by the President after consultation with the Members of the appropriate
congressional committees. The appointment of private citizens was discontinued after 1987 in accordance with the group's redesignation as the U.S. Senate Caucus on International Narcotics Control. ==Committee leadership==