EFFECTIVE DATE.

SEC. 612. EFFECTIVE DATE. The amendments made by this title shall take effect on the date of the enactment of this Act, except that the amendments shall have no effect on any order or interpretative bulletin that is issued under the National Manufactured Housing Construction and Safety Standards Act of 1974 (42 U.S.C. 5401 et seq.) and published as a proposed rule pursuant to section 553 of title 5, United States Code, on or before that date of the enactment.