Colo. Rev. Stat. § 31-23-211
Where a commission is established in accordance with the provisions of this part 2, it has and shall exercise all of the powers and rights granted to the zoning commission by part 3 of this article. When there is a zoning commission in existence at the time that a commission is created, the zoning commission shall deliver to the commission all of its records and shall thereafter cease to exercise the powers and prerogatives previously exercised by it; except that, if the existing zoning commission is nearing completion of a zoning plan, the governing body of the municipality may postpone, by resolution, the transfer of the zoning commission's powers until completion of the zoning plan; but in no event shall the period of such postponement exceed six months from the date of the creation of the commission. Nothing in this section shall invalidate or otherwise affect any zoning law or regulation or any action of the zoning commission adopted or taken prior to the creation of a commission.
C.R.S. § 31-23-211
This section is similar to former § 31-23-111 as it existed prior to 1975.