21 CFR § 1312.32 - Schedules II, III, IV: Advance notice.
(a) A controlled substance listed in Schedules II, III, or IV may be imported into the United States for transshipment, or may be transferred or transshipped within the United States for immediate exportation, provided that written notice is submitted to the Regulatory Section, Diversion Control Division, Drug Enforcement Administration, at least 15 calendar days prior to the expected date of date of arrival at the first port in the United States. See the Table of DEA mailing Addresses in § 1321.01 of this chapter for the current mailing addresses.
(b) A separate advance notice is required for each shipment of controlled substance to be imported, transferred, or transshipped. Each advance notice must contain those items required by § 1312.31(b) and (c). If the export license, permit, or other authorization, issued by a competent national authority of the country of origin, is not written in English or bilingual with another language and English, the notice must be accompanied by a certified translation of the export license, permit, or other authorization. For purposes of this requirement, certified translation means that the translator has signed the translation legally attesting the accuracy of the translation.