Section 514(c) of Pub. L. 99–499 provided that:

“(1) In general.—The amendments made by this section [repealing this section and sections 4681 and 4682 of Title 26, Internal Revenue Code] shall take effect on October 1, 1983.

“(2) Waiver of statute of limitations.—If on the date of the enactment of this Act [Oct. 17, 1986] (or at any time within 1 year after such date of enactment) refund or credit of any overpayment of tax resulting from the application of this section is barred by any law or rule of law, refund or credit of such overpayment shall, nevertheless, be made or allowed if claim therefor is filed before the date 1 year after the date of the enactment of this Act.”