Amend D.C. motor vehicle safety responsibility act : hearing before the Subcommittee on Business, Commerce, and Taxation of the Committee on the District of Columbia, House of Representatives, Ninety-third Congress, second session, on H.R. 5686, to amend the Motor Vehicle Safety Responsibility Act of the District of Columbia, the District of Columbia Traffic Act of 1925, to authorize the issuance of special identification cards, and for other purposes, May 8, 1974.