1976—Pub. L. 94–579 struck out proviso authorizing that not more than 20 per centum of relevant appropriations be used for resurveys and retracements under this section.

Pub. L. 94–579, title VII, § 705(a), Oct. 21, 1976, 90 Stat. 2792, provided that the amendment made by section 705(a) is effective on and after Oct. 21, 1976.

Amendment by Pub. L. 94–579 not to be construed as terminating any valid lease, permit, patent, etc., existing on Oct. 21, 1976, see section 701 of Pub. L. 94–579, set out as a note under section 1701 of this title.