A prior section 3838, Pub. L. 99–198, title XII, § 1238, as added Pub. L. 101–624, title XIV, § 1439, Nov. 28, 1990, 104 Stat. 3590, related to policy of Congress on water quality protection, prior to repeal by Pub. L. 104–127, title III, § 336(h), Apr. 4, 1996, 110 Stat. 1007.

Pub. L. 107–171, title II, § 2001(b), May 13, 2002, 116 Stat. 233, provided that: “Not later than 270 days after the date of enactment of this Act [May 13, 2002], the Secretary of Agriculture shall promulgate regulations implementing the amendment made by subsection (a) [enacting this subpart].”