Section 13 of the Act of December 22, 1944 (58 Stat. 887), as amended and supplemented, referred to in par. (6), is section 13 of act Dec. 22, 1944, ch. 665, 58 Stat. 887, which was not classified to the Code.

2018—Pub. L. 115–334 inserted section catchline, designated existing provisions as subsec. (a), inserted heading, and added subsec. (b).

1990—Par. (6). Pub. L. 101–624 inserted “and enhance the water quality of” after “recreation resources of”.

1981—Par. (6). Pub. L. 97–98 inserted reference to energy in the enumeration of the various aspects of lands to be conserved and developed within areas included under plans for works of improvement.

1972—Par. (6). Pub. L. 92–419 added par. (6).

1956—Pars. (2) to (6). Act Aug. 7, 1956, substituted in par. (2) provisions authorizing the Secretary to prepare plans and estimates required for adequate engineering evaluation for provisions which authorized the Secretary to make studies for physical and economic soundness of plans for works of improvement, added par. (3), and redesignated former pars. (3) and (4) as (4) and (5), respectively.

Amendment by Pub. L. 97–98 effective Dec. 22, 1981, see section 1801 of Pub. L. 97–98, set out as an Effective Date note under section 4301 of Title 7, Agriculture.

Amendment by act Aug. 7, 1956, as applicable to all works of improvement and plans for such works under the provisions of this chapter, see Extension of Benefits note set out under section 1001 of this title.

For transfer of certain enforcement functions of Secretary or other official in Department of Agriculture under this chapter to Federal Inspector, Office of Federal Inspector for Alaska Natural Gas Transportation System, and subsequent transfer to Secretary of Energy, then to Federal Coordinator for Alaska Natural Gas Transportation Projects, see note set out under section 1002 of this title.