A joint resolution granting the consent and approval of the Congress for the States of Virginia and Maryland and the District of Columbia to amend the Washington Metropolitan Area Transit Regulation Compact to delete the requirement that laborers and mechanics employed by contractors and subcontractors in the construction, alteration, or repair of projects undertaken by the Washington Metropolitan Area Transit Authority be paid wages at rates not less than those prevailing on similar construction in the locality as determined by the Secretary of Labor in accordance with the Davis-Bacon Act.