Colo. Rev. Stat. § 2-2-325
Unless otherwise provided by law, appointments or reappointments of persons to a board, commission, committee, council, panel, or authority by the speaker of the house of representatives, the president of the senate, the majority leader of the house of representatives, the majority leader of the senate, the minority leader of the house of representatives, or the minority leader of the senate shall expire on the convening date of the first regular session of each general assembly, and all subsequent appointments or reappointments shall be made as soon as practicable after such convening date. The person making the original appointment or reappointment shall fill any vacancy by appointment for the remainder of an unexpired term. Members appointed or reappointed by the speaker, the president, the majority leader of the house of representatives, the majority leader of the senate, the minority leader of the house of representatives, or the minority leader of the senate shall serve at the pleasure of the appointing authority and shall continue in office until the member's successor is appointed.
C.R.S. § 2-2-325