Colorado Revised Statutes Title 40. Utilities § 40-3.5-106. Advantages prohibited--graduated schedules

(1) No municipal utility, as to rates, charges, service, facilities, or in any other respect, shall make or grant any preference or advantage to any corporation or person or subject any corporation or person to any prejudice or disadvantage. No municipal utility shall establish or maintain any unreasonable difference as to rates, charges, service, facilities, or in any other respect, either between localities or between any class of service. The governing body of each municipal utility shall determine the reasonableness of any such difference.

(2) Nothing in this article shall prohibit a municipal utility engaged in the production, generation, transmission, distribution, or furnishing of heat, light, gas, or power from establishing a graduated scale of charges subject to the provisions of this article.

(3) Nothing contained in this article shall exempt from the public utilities commission of the state of Colorado the power and authority to regulate the rates, charges, tariffs and any regulations pertaining thereto of the sale of natural gas by a municipal utility to another public utility.