The Controlled Substances Act, referred to in text, is title II of Pub. L. 91–513, Oct. 27, 1970, 84 Stat. 1242, which is classified principally to subchapter I (§ 801 et seq.) of chapter 13 of Title 21, Food and Drugs. Schedules I and II are set out in section 812 of Title 21. For complete classification of this Act to the Code, see Short Title note set out under section 801 of Title 21 and Tables.

Pub. L. 97–248, title III, § 351(c), Sept. 3, 1982, 96 Stat. 640, provided that: “The amendments made by this section [enacting this section] shall apply to amounts paid or incurred after the date of the enactment of this Act [Sept. 3, 1982] in taxable years ending after such date.”