19 CFR § 162.61 - Importing and exporting controlled substances.
It shall be unlawful to import to or export from the United States any controlled substance or narcotic drug listed in schedules I through V of the Controlled Substances Act (Sec. 202, 84 Stat. 1247; 21 U.S.C. 812), unless there has been compliance with the provisions of said Act, the Controlled Substances Import and Export Act and the regulations of the Drug Enforcement Administration.
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