; or (B) that is ecologically homogeneous, as determined by the Secretary in consultation with the heads of other Federal departments or agencies the Secretary considers appropriate. (10) Major conversion The term major conversion has the meaning given that term in section 2101(14a) of title 46, United States Code. (11) Navigable waters of the United States The term navigable waters of the United States has the meaning given that term in section 2101(17a) of title 46, United States Code. (12) Owner or operator The term owner or operator means a person owning, operating, or chartering by demise a commercial vessel. (13) Pollutant The term pollutant has the meaning given that term in section 502(6) of the Federal Water Pollution Control Act ( 33 U.S.C. 1362(6) ). (14) Recreational vessel The term recreational vessel has the meaning given that term in section 2101(25) of title 46, United States Code. (15) Secretary The term Secretary means the Secretary of the department in which the Coast Guard is operating. 3. Existing ballast water regulations (a) Effect on existing regulations Any regulation issued pursuant to the Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 that is in effect on the date immediately preceding the effective date of this Act, and that relates to a matter subject to regulation under this Act, shall remain in full force and effect unless or until superseded by a new regulation issued under this Act relating to such matter. (b) Application of other regulations The regulations issued pursuant to the Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 relating to sanctions for violating a regulation under that Act shall apply to violations of a regulation issued under this Act. 4. Ballast water discharge requirements (a) In general (1) Requirements Except as provided in paragraph (3), and subject to sections 151.2035 and 151.2036 of title 33, Code of Federal Regulations (as in effect on the date of enactment of this Act), an owner or operator may discharge ballast