Colorado Revised Statutes Title 31. Government Municipal § 31-12-412. Annexing cities and towns

(1) When any city or town desires to be annexed to another contiguous city or town, the governing body of each such city or town shall appoint a total of three commissioners to arrange and report to such governing body respectively the terms and conditions on which the proposed annexation can be made. If the governing body of each such city or town approves of the terms and conditions proposed, it shall so declare by proper ordinance. Thereupon, the governing body of each such city or town, by ordinance passed at least thirty days prior to the regular election therein or at least thirty days prior to a special election for that specific purpose, may submit the question of such annexation upon the terms and conditions so proposed to the registered electors of its respective city or town. Such election shall be conducted in accordance with the provisions of the “Colorado Municipal Election Code of 1965”. 1

(2) If a majority of the registered electors of each city or town vote in favor of such annexation, the governing body of each shall so declare by proper ordinance. A certified copy of the whole proceedings for annexation of the city or town to be annexed shall be filed with the clerk of the city or town to which the annexation is made, and the latter shall file two certified copies of the notice of such action with a legal description accompanied by a map of the area concerned with the county clerk and recorder of the county in which such action has taken place. 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.