Pub. L. 100–203, title X, § 10714(e), Dec. 22, 1987, 101 Stat. 1330–472, provided that: “The amendments made by this section [enacting this section and amending sections 6501 and 7454 of this title] shall apply to taxable years beginning after the date of the enactment of this Act [Dec. 22, 1987].”