1990—Subsec. (b)(8).
Pub. L. 101–647 substituted “extension” for “extention”.
1979—Subsec. (b)(9).
Pub. L. 96–43, § 9(a), added par. (9).
Subsec. (c)(7).
Pub. L. 96–43, § 9(b), added par. (7).
Subsec. (f).
Pub. L. 96–43, § 9(c), added subsec. (f).