USC › Title 6 › §488h6 U.S.C. § 488hVerified against govinfo.gov as of June 20, 2026View official text on govinfo.gov ↗Copy linkThe Secretary—(1)shall issue a proposed rule implementing this part not later than 6 months after December 26, 2007; and(2)issue a final rule implementing this part not later than 1 year after December 26, 2007.