; and (2) any subsequent, consecutive 3-year period if, by the beginning of such period, the State submits a request under subsection (a)(1) for such period. (c) Delayed effective date The effective period of a request under subsection (a)(1) shall commence not sooner than the effective date of the State’s regulatory regime required by subsection (a)(2). (d) Loss of waiver (1) In general The Attorney General may— (A) continually review the production, manufacture, distribution, prescribing, dispensing, possession, and use of marihuana in a State with a waiver in effect under subsection (a); and (B) after providing notice and an opportunity to correct under paragraph (2), revoke such waiver if the Attorney General finds, with respect to such State, that the conditions listed in subsection (a) are no longer met. (2) Notice; opportunity To correct If the Attorney General finds that the conditions listed in subsection (a) are no longer met, the Attorney General shall give the State involved— (A) notice of such finding; and (B) a period of not less than 180 days to correct any failure to meet the conditions listed in subsection (a). (e) Rule of construction Nothing in this section shall be construed to prohibit the Federal Government from providing assistance to a State (under Federal law other than this title) in the implementation or enforcement of State law relating to the production, manufacture, distribution, prescribing, dispensing, possession, or use of marihuana. (f) Definition In this section, the term tainted means containing microbes, pesticides, or controlled substances other than marihuana. . (b) Clerical amendment The table of contents at the beginning of the Comprehensive Drug Abuse Prevention and Control Act of 1970 ( Public Law 91–513 ) is amended by inserting at the end of the items relating to part E of title II the following new item: Sec. 521. Inapplicability to marihuana in certain States. .