Upon a finding by the Secretary of Housing and Urban Development that the acquisition of any real property for a defense installation or industry has resulted, or will result, in the displacement of persons from their homes on such property, he may (notwithstanding any other provision of this or any other law) issue regulations pursuant to which such persons may be permitted to occupy or purchase housing for which credit restrictions established pursuant to the Defense Production Act of 1950 [50 U.S.C. 4501 et seq.] have been relaxed or housing which has been provided or assisted under the provisions of this Act (including amendments to other Acts provided herein), subject to any conditions or requirements that he determines necessary for purposes of national defense.