; 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 a State of the United States, the District of Columbia, and any commonwealth, territory, or possession of the United States. ; and (4) by adding at the end the following new section: 580. Enforcement