Colorado Revised Statutes Title 43. Transportation § 43-4-611. Powers of governmental units

(1) A governmental unit, for the purpose of aiding and cooperating in the financing, construction, operation, or maintenance of any regional transportation system, has the power:

(2) To assist in the financing, construction, operation, or maintenance of a regional transportation system, any county, municipality, or special district that is a member of a combination or of a transportation planning organization exercising the powers of an authority as authorized by section 43-4-622 may, by contract, pledge to the authority all or a portion of the revenues it receives from the highway users tax fund or from any other legally available funds. The authority shall apply revenues that it receives pursuant to the pledge to the financing, construction, operation, or maintenance of any regional transportation system. The authority may refuse to accept any revenues that would cause a member of the combination or of the transportation planning organization to exceed its allowable fiscal year spending under section 20 of article X of the state constitution and that could result in a refund of excess revenues under said section 20.