Colo. Rev. Stat. § 32-12-118
If any proposition authorized by section 32-12-117 is approved by a majority of electors voting thereon, the rail district shall thereupon be authorized to incur such indebtedness or obligations, enter into such contracts, or issue and sell such bonds of the rail district, as the case may be, all for the purposes and objects provided for in the proposition submitted under said section, in the amount so provided, and at a price and at a rate of interest such that the maximum net effective interest rate recited in the resolution is not exceeded. Submission of the proposition of incurring such obligation or bonded or other indebtedness at such an election shall not prevent or prohibit submission of the same or other propositions at subsequent elections called for such purpose, but no new election creating an indebtedness may be held within one hundred twenty days after the date of the election at which a proposal was defeated. No more than two such elections may be held within any twelve-month period.
C.R.S. § 32-12-118