Mitigation; Defining the term “applicant”; revising the entities to whom and purposes for which water quality enhancement credits may be sold; requiring the Department of Environmental Protection or water management districts to authorize the sale and use of such credits to applicants, rather than to governmental entities, to address adverse water quality impacts of certain activities; authorizing local governments with land in credit-deficient basins to consider bids from private-sector applicants to establish mitigation banks on such lands, etc.