Colorado Revised Statutes Title 31. Government Municipal § 31-12-201. Including adjacent area upon reorganization

(1) When a city or town incorporated prior to July 3, 1877, proceeds to abandon its prior organization and to reorganize under the provisions of part 3 of article 2 of this title, it may include within the boundaries of such reorganized municipality all or any part of contiguous area if:

(2) In such cases, the boundaries of all of such city or town, including such contiguous territory, shall be set forth in the petition described in part 3 of article 2 of this title, and all registered electors residing within those boundaries shall be entitled to vote at the election to be conducted under the provisions of said part 3 of article 2.