SDCL § 9-11-11: Form of municipal government.

Each first or second class municipality must be governed by a mayor and common council, a mayor and a common council with a city manager, a board of commissioners, or a board of commissioners with a city manager. Each third class municipality must be governed by a board of trustees, with or without a city manager.

The present form of government of existing municipalities must continue until changed as provided by this title.