Minn. Stat. § 410.04 : —CITIES, ORGANIZATIONCLASSIFICATION; CHARTERS — HOME RULE CHARTERS; PATROL LIMITS

Any city in the state may frame a city charter for its own government in the manner hereinafter prescribed; provided, that in such cities having patrol limits established by charter, such limits shall not be altered unless the charter proposing such alteration be adopted by a three-fourths majority.