All immunity of the state from the provisions of the Sherman Antitrust Act [Act July 2, 1890, c.647; 26 Stat. 209; 15 U.S.C. 1 et seq.] is hereby extended to any city or city governing body acting within the scope of the grants of authority contained in sections 40-05-01, 40-05-02, and 40-05.1-06. When acting within the scope of the grants of authority contained in sections 40-05-01, 40-05-02, and 40-05.1-06, a city or city governing body shall be presumed to be acting in furtherance of state policy.
40-01-23. Authorization to organize and participate in an organization of city governments. 1. Cities incorporated under the statutes of North Dakota are hereby authorized upon motion of the city governing body to organize and participate in an organization of city governments. 2. The organization or organizations authorized hereunder must be organized pursuant to chapter 10-33.