Nothing in this chapter shall be construed as affecting—
(1)
the authority, jurisdiction, or responsibility of the States to manage, control, or regulate fish and resident wildlife under State law;
(2)
any requirement under State law that lands, waters, and interests therein may only be acquired for conservation purposes if the owner thereof is a willing seller; and
(3)
the authority of the Secretary of Agriculture under the Act of March 2, 1931 (46 Stat. 1468–1469, 7 U.S.C. 426–426b).