Section 1308.49 - Temporary scheduling(a) Pursuant to 21 U.S.C. 811(h) and without regard to the requirements of 21 U.S.C. 811(b) relating to the scientific and medical evaluation of the Secretary of Health and Human Services, the Drug Enforcement Administration may place a substance into Schedule I on a temporary basis, if it determines that such action is necessary to avoid an imminent hazard to the public safety. An order issued under this section may not be effective before the expiration of 30 calendar days from: (1) The date of publication by the Administration of a notice in the FEDERAL REGISTER of its intention to issue such order and the grounds upon which such order is to be issued; and(2) The date the Administration has transmitted notification to the Secretary of Health and Human Services of the Administration's intention to issue such order.(b) An order issued under this section will be vacated upon the conclusion of a subsequent rulemaking proceeding initiated under section 201(a) (21 U.S.C. 811(a) ) with respect to such substance or at the end of two years from the effective date of the order scheduling the substance, except that during the pendency of proceedings under section 201(a) (21 U.S.C. 811(a) ) with respect to the substance, the Administration may extend the temporary scheduling for up to one year. 81 FR 97021 , Dec. 30, 2016