Pub. L. 96–223, title IV, § 403(a)(3), Apr. 2, 1980, 94 Stat. 304, as amended by Pub. L. 99–514, § 2, Oct. 22, 1986, 100 Stat. 2095, provided that: “The amendments made by paragraphs (1) and (2) [enacting this section] shall apply to qualified liquidations (within the meaning of section 473(c) of the Internal Revenue Code of 1986 [formerly I.R.C. 1954]) in taxable years ending after October 31, 1979.”