Notwithstanding any other provisions of law, the Secretary of Agriculture (referred to in sections 1033 to 1035 and 1037 to 1039 of this title as the “Secretary”) is authorized and directed to sell, as provided in said sections, all mineral interests now owned by the United States, which have been reserved or acquired by it under any program heretofore administered by the Resettlement Administration, or the Farm Security Administration, or now administered by the Farmers Home Administration, except the program administered pursuant to sections 1010 to 1012 of this title and the program for the liquidation of labor camps pursuant to Public Law 298, Eightieth Congress.