42 U.S.C. § 6992j
The regulations promulgated under this subchapter shall take effect within 90 days after promulgation, except that, at the time of promulgation, the Administrator may provide for a shorter period prior to the effective date if he finds the regulated community does not need 90 days to come into compliance.
(Pub. L. 89–272, title II, § 11010, formerly § 11011, as added Pub. L. 100–582, § 2(a), , 102 Stat. 2958; renumbered § 11010, Pub. L. 105–362, title V, § 501(h)(1)(B), , 112 Stat. 3284.)
A prior section 11010 of Pub. L. 89–272 was renumbered section 11009 and is classified to section 6992i of this title.