; and (B) in subsection (c), by adding after and below paragraph (2) the following flush matter: For the purposes of this subsection, the term criminal activity shall not include the use, distribution, possession, sale, or manufacture of marihuana (as such term is defined in section 102 of the Controlled Substances Act ( 21 U.S.C. 802 )) that is in compliance with the law of the State in which such use, distribution, possession, sale, or manufacture takes place. ; (2) in section 577 ( 42 U.S.C. 13662 ), by adding at the end the following new subsection: (c) State law exception For the purposes of this section, the term illegal use of a controlled substance shall not include the use, distribution, possession, sale, or manufacture of marihuana (as defined in section 102 of the Controlled Substances Act ( 21 U.S.C. 802 )) that is in compliance with the law of the State in which such use, distribution, possession, sale, or manufacture takes place. ; (3) in section 579, by adding at the end the following new paragraph: (4) State The term State means the several States, the District of Columbia, the Commonwealth of Puerto Rico, the territories and possessions of the United States, and the Trust Territory of the Pacific Islands. ; and (4) by adding at the end the following new section: 580. Enforcement