A commission to be known as the Migratory Bird Conservation Commission, consisting of the Secretary of the Interior, as chairman, the Administrator of the Environmental Protection Agency, the Secretary of Agriculture and two Members of the Senate, to be selected by the President of the Senate, and two Members of the House of Representatives to be selected by the Speaker, is created and authorized to consider and pass upon any area of land, water, or land and water that may be recommended by the Secretary of the Interior for purchase or rental under this subchapter, and to fix the price or prices at which such area may be purchased or rented; and no purchase or rental shall be made of any such area until it has been duly approved for purchase or rental by said commission. Any Member of the House of Representatives who is a member of the commission, if reelected to the succeeding Congress, may serve on the commission notwithstanding the expiration of a Congress. Any vacancy on the commission shall be filled in the same manner as the original appointment. The ranking officer of the branch or department of a State to which is committed the administration of its game laws, or his authorized representative, and in a State having no such branch or department, the governor thereof, or his authorized representative, shall be a member ex officio of said commission for the purpose of considering and voting on all questions relating to the acquisition, under this subchapter, of areas in his State. For purposes of this subchapter, the purchase or rental of any area of land, water, or land and water includes the purchase or rental of any interest in any such area of land, water, or land and water.