Sec. 6. 38 MRSA §465-A, sub-§1, śC, as amended by PL 1999, c. 243, §9, is repealed and the following enacted in its place:

C.__There may be no new direct discharge of pollutants into Class GPA waters.__The following are exempt from this provision:

(1)__Chemical discharges for the purpose of restoring water quality approved by the department;

(2)__Aquatic pesticide or chemical discharges approved by the department and conducted by the department, the Department of Inland Fisheries and Wildlife or an agent of either agency for the purpose of restoring biological communities affected by an invasive species; and

(3)__Storm water discharges that are in compliance with state and local requirements.

Discharges into these waters licensed prior to January 1, 1986 are allowed to continue only until practical alternatives exist.__Materials may not be placed on or removed from the shores or banks of a Class GPA water body in such a manner that materials may fall or be washed into the water or that contaminated drainage may flow or leach into those waters, except as permitted pursuant to section 480-C.__A change of land use in the watershed of a Class GPA water body may not, by itself or in combination with other activities, cause water quality degradation that impairs the characteristics and designated uses of downstream GPA waters or causes an increase in the trophic state of those GPA waters.

Sec. 7. 38 MRSA §466, sub-§8-A is enacted to read:

8-A.__Invasive species.__"Invasive species" means an invasive animal as determined by the Department of Inland Fisheries and Wildlife or an invasive aquatic plant as listed under section 410-N or as determined by the department.__A species may be determined to be invasive for all waters or for specific waters.