Minn. Stat. § 216B.22: MUNICIPALITY; AMICUS CURIAE AUTHORITY.

Any municipality that regulates and controls the exercise of a public utility franchise by reason of its home rule charter on January 1, 1975, is authorized to assist the Public Utilities Commission as amicus curiae in any proceeding brought before the commission with respect to the rates, fares, prices, regulation, or control of any utility operating therein.