Colo. Rev. Stat. § 31-12-405
The members of the governing body elected at such election, on the second Monday after the election, shall meet and organize the governing body of the consolidated city or town and shall file two certified copies of the notice of the consolidation with a legal description accompanied by a map of the area concerned by the consolidated city or town with the county clerk and recorder of the county in which such action has taken place, and from that time the consolidation shall be deemed complete. The county clerk and recorder shall file the second certified copy of such notice with the division of local government in the department of local affairs, as provided by section 24-32-109, C.R.S. The consolidated city or town shall thenceforth exist with the same powers and duties and subject to the same regulations as other cities or towns. The cities or towns so consolidated shall then be merged in the consolidated corporation, and the terms of office of all of the officers of the cities and towns so consolidated shall cease.
C.R.S. § 31-12-405
This section is similar to former § 31-8-306 as it existed prior to 1975.