Colorado Revised Statutes Title 1. Elections § 1-4-205. County commissioners

(1)(a) Members of the board of county commissioners shall be elected in each county, excluding a city and county, for a term of four years.

(b) No person shall be a county commissioner unless that person is a registered elector and has resided in the district for at least one year prior to the election.

(3)(a) In each county having a population of seventy thousand or more, the board of county commissioners may consist either of three members, any two of whom shall constitute a quorum for the transaction of business, or of five members, any three of whom shall constitute a quorum for the transaction of business.

(b) If the board consists of three commissioners, they shall be elected as provided in subsection (2) of this section and as provided in section 30-10-306.7(5), C.R.S.

(c) In any county having a population of seventy thousand or more, the membership of the board of county commissioners may be increased from three to five members pursuant to section 30-10-306.5, C.R.S., or decreased from five to three members pursuant to section 30-10-306.7(2)(a)(II), C.R.S.