; or (2) a discharge incidental to the normal operation of a commercial vessel. (b) Preservation of authority Nothing in this Act affects the authority of a State or political subdivision thereof to adopt or enforce any statute, regulation, or other requirement with respect to any water or other substance discharged or emitted from a vessel in preparation for transport of the vessel by land from one body of water to another. 12. Effect on other laws (a) Application of Federal Water Pollution Control Act (1) In general Except as provided in section 8(b), on or after the date of enactment of this Act, the Federal Water Pollution Control Act ( 33 U.S.C. 1251 et seq.) shall not apply to a discharge into navigable waters of the United States of ballast water from a commercial vessel or a discharge incidental to the normal operation of a commercial vessel. (2) Oil and hazardous substance liability; marine sanitation devices Nothing in this Act shall affect the application to a commercial vessel of— (A) section 311 of the Federal Water Pollution Control Act ( 33 U.S.C. 1321 ); or (B) section 312 of the Federal Water Pollution Control Act ( 33 U.S.C. 1322 ). (b) Established regimes Notwithstanding any other provision of this Act, nothing in this Act shall affect the authority of the Federal Government under— (1) the Act to Prevent Pollution from Ships ( 33 U.S.C. 1901 et seq.) with respect to the regulation by the Federal Government of any discharge or emission that, on or after the date of enactment of this Act, is covered under the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978