http://www.usdoj.gov/dea/pubs/csa/952.htm#a
CITE-
21 USC Sec. 95201/22/02
-EXPCITE-
TITLE 21 - FOOD AND DRUGS
CHAPTER 13 - DRUG ABUSE PREVENTION AND CONTROL
SUBCHAPTER II - IMPORT AND EXPORT
-HEAD-
Sec. 952. Importation of controlled substances
-STATUTE-
(a) Controlled substances in schedule I or II and narcotic drugs in schedule III, IV, or V; exceptions It shall be unlawful to import into the customs territory of the United States from any place outside thereof (but within the United States), or to import into the United States from any place outside thereof, any controlled substance in schedule I or II of subchapter I of this chapter, or any narcotic drug in schedule III, IV, or V of subchapter I of this chapter, except that -
(1) such amounts of crude opium, poppy straw, concentrate of poppy straw, and coca leaves as the Attorney General finds to be necessary to provide for medical, scientific, or other legitimate purposes, and
(2) such amounts of any controlled substance in schedule I or II or any narcotic drug in schedule III, IV, or V that the Attorney General finds to be necessary to provide for the medical, scientific, or other legitimate needs of the United States -
(A) during an emergency in which domestic supplies of such substance or drug are found by the Attorney General to be inadequate,
(B) in any case in which the Attorney General finds that competition among domestic manufacturers of the controlled substance is inadequate and will not be rendered adequate by the registration of additional manufacturers under section 823 of this title, or
(C) in any case in which the Attorney General finds that such controlled substance is in limited quantities exclusively for scientific, analytical, or research uses, may be so imported under such regulations as the Attorney General shall prescribe. No crude opium may be so imported for the purpose of manufacturing heroin or smoking opium.
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