Colo. Rev. Stat. § 2-2-316
Considering the greatly improved highways and airways of this state which permit greater mobility with less cost in money and time, considering the increasing length of legislative sessions, the increasing complexity and importance of the problems presented, and the benefits to be derived from frequent contact between legislator and constituents, and considering the desirability of preserving the concept of part-time citizen-legislators and, therefore, the need to allow them a reasonable opportunity to attend to their own personal, family, and business affairs even during sessions of the general assembly, it is hereby declared to be necessary, within the meaning of the state constitution and in the best interests of the general assembly and the state of Colorado, that members of the senate and house of representatives travel to their homes or other locations within their districts and back to the capitol during sessions of the general assembly when the house to which they belong is in adjournment for periods not exceeding seventy-two hours.
C.R.S. § 2-2-316