1990—Subsec. (b)(1)(C). Pub. L. 101–501, § 501(a), (b)(1), inserted “(including, at the option of the State, any training necessary for credentialing)” after “credentialing” and struck out “and” at end.

Subsec. (b)(2), (3). Pub. L. 101–501, § 501(b)(2), (3), added par. (2) and redesignated former par. (2) as (3).

Amendment by Pub. L. 101–501 effective Oct. 1, 1990, see section 1001(a) of Pub. L. 101–501, set out as a note under section 8621 of this title.

Section effective Oct. 1, 1986, see section 1001 of Pub. L. 99–425, set out as an Effective Date of 1986 Amendment note under section 8621 of this title.