Pub. L. 110–234 and Pub. L. 110–246 made identical amendments to this section. The amendments by Pub. L. 110–234 were repealed by section 4(a) of Pub. L. 110–246.

A prior section 3839aa–5, Pub. L. 99–198, title XII, § 1240E, as added Pub. L. 104–127, title III, § 334, Apr. 4, 1996, 110 Stat. 1001, related to environmental quality incentives program plan, prior to the general amendment of this part by Pub. L. 107–171.

2018—Subsec. (a)(3). Pub. L. 115–334, § 2305, inserted “progressive” before “implementation”.

Subsec. (b)(2). Pub. L. 115–334, § 2301(d)(1)(H), substituted “this subpart” for “this part”.

2008—Subsec. (a). Pub. L. 110–246, § 2506(a)(1), (2), substituted “Plan of operations” for “In general” in heading and struck out “cost-share payments or incentive” before “payments” in introductory provisions.

Subsec. (a)(4). Pub. L. 110–246, § 2506(a)(3)–(5), added par. (4).

Subsec. (b). Pub. L. 110–246, § 2506(b), amended subsec. (b) generally. Prior to amendment, text read as follows: “The Secretary shall, to the maximum extent practicable, eliminate duplication of planning activities under the program under this part and comparable conservation programs.”

Amendment of this section and repeal of Pub. L. 110–234 by Pub. L. 110–246 effective May 22, 2008, the date of enactment of Pub. L. 110–234, see section 4 of Pub. L. 110–246, set out as an Effective Date note under section 8701 of Title 7, Agriculture.