Colo. Const. art. XII, § 10
If any person elected or appointed to any office shall refuse or neglect to qualify therein within the time prescribed by law, such office shall be deemed vacant.
Source: Entire article added, effective August 1, 1876, see L. 1877, p. 65.
Cross references: For how vacancies in county offices are filled, see § 9 of article XIV of this constitution.