A prior section 2991c, Pub. L. 88–452, title VIII, § 804, as added Pub. L. 93–644, § 11, Jan. 4, 1975, 88 Stat. 2324, authorized Secretary to provide technical assistance and training in developing, conducting, and administering projects under this subchapter and short-term in-service training for specialized personnel, prior to repeal by Pub. L. 102–375, § 822(4).

Another prior section 2991c, Pub. L. 88–452, title VIII, § 804, as added Pub. L. 89–794, title VIII, § 801, Nov. 8, 1966, 80 Stat. 1473; amended Pub. L. 90–83, § 10(b), Sept. 11, 1967, 81 Stat. 224, provided for applicability of specified Federal laws, oath or affirmation, and status of volunteers as Federal employees and as persons employed in executive branch of Federal Government, prior to the general amendment of this subchapter by Pub. L. 90–222, title I, § 110, Dec. 23, 1967, 81 Stat. 722.

2020—Pub. L. 116–261 designated existing provisions as subsec. (a), inserted heading, and added subsec. (b).