3-A. Violation of municipal ordinances. A method of operation used by a farm or farm operation located in an area where agricultural activities are permitted may not be considered a violation of a municipal ordinance if the method of operation constitutes a best management practice as determined by the Department of Agriculture, Food and Rural Resources.

4. Application; municipal ordinances. This section does not affect the application of state and federal laws. After the effective date of this subsection, a municipality must provide the Commissioner of Agriculture, Food and Rural Resources with a copy of any proposed ordinance that impacts farm operations. The clerk of the municipality or a municipal official designated by the clerk shall submit a copy of the proposed ordinance to the commissioner at least 90 days prior to the meeting of the legislative body or public hearing at which adoption of the ordinance will be considered. The commissioner shall review the proposed ordinance and advise the municipality if the proposed ordinance would restrict or prohibit the use of best management practices. This subsection does not affect municipal authority to enact ordinances.

5. Complaint resolution. The commissioner shall investigate all complaints involving a farm or, farm operation or agricultural composting operation, including, but not limited to, complaints involving the use of waste products, ground groundwater and surface water pollution and insect infestations. In cases of insect infestations not arising from agricultural activities, when the State Entomologist believes that the infestation is a public nuisance and is able to identify the source or sources of the infestation, the commissioner shall refer the matter to the Department of the Attorney General. If the commissioner finds upon investigation that the person responsible for the farm or, farm operation or agricultural composting operation is using best management practices, the commissioner shall notify that person and the complainant of this finding in writing. Notwithstanding subsection 2-A, paragraph C, if the commissioner identifies the source or sources of the problem and finds that the problem is caused by the use of other than best management practices, the commissioner shall:

A. Determine the changes needed in the farm or, farm operation or agricultural composting operation to comply with best management practices and prescribe site specific