Colo. Rev. Stat. § 40-3-102
The power and authority is hereby vested in the public utilities commission of the state of Colorado and it is hereby made its duty to adopt all necessary rates, charges, and regulations to govern and regulate all rates, charges, and tariffs of every public utility of this state to correct abuses; to prevent unjust discriminations and extortions in the rates, charges, and tariffs of such public utilities of this state; to generally supervise and regulate every public utility in this state; and to do all things, whether specifically designated in articles 1 to 7 of this title or in addition thereto, which are necessary or convenient in the exercise of such power, and to enforce the same by the penalties provided in said articles through proper courts having jurisdiction; except that nothing in this article shall apply to municipal natural gas or electric utilities for which an exemption is provided in the constitution of the state of Colorado, within the authorized service area of each such municipal utility except as specifically provided in section 40-3.5-102.
C.R.S. § 40-3-102
For definition of a public utility, see § 40-1-103 ; for penalties for violation, see article 7 of this title.