The board of county commissioners shall not borrow money for the purposes stated in section 30-11-107, except as provided in section 30-11-107(1)(dd), without having first submitted the question of such loan to a vote of the electors of the county and without a majority of the voters legally qualified to vote and voting on that question having voted therefor.
C.R.S. § 30-11-108
For authority of county to contract debts, see § 6 of art. XI, Colo. Const.