Colo. Const. art. XIV, § 18

(1) (a) Any other provisions of this constitution to the contrary notwithstanding:

(b) The general assembly may provide by statute for the terms and conditions under which one or more service authorities may succeed to the rights, properties, and other assets and assume the obligations of any other political subdivision included partially or entirely within such authority, incident to the powers vested in, and the functions, services, and facilities authorized to be provided by the service authority, whether vested and authorized at the time of the formation of the service authority or subsequent thereto; and,

(c) The general assembly may provide by statute for the terms and conditions under which a county, home rule county, city and county, home rule city or town, statutory city or town, or quasi-municipal corporation, or any combination thereof may succeed to the rights, properties, and other assets and assume the obligations of any quasi-municipal corporation located partially or entirely within its boundaries.

(d) The general assembly may provide by statute procedures whereby any county, home rule county, city and county, home rule city or town, statutory city or town, or service authority may establish special taxing districts.

(2) (a) Nothing in this constitution shall be construed to prohibit the state or any of its political subdivisions from cooperating or contracting with one another or with the government of the United States to provide any function, service, or facility lawfully authorized to each of the cooperating or contracting units, including the sharing of costs, the imposition of taxes, or the incurring of debt.

(b) Nothing in this constitution shall be construed to prohibit the authorization by statute of a separate governmental entity as an instrument to be used through voluntary participation by cooperating or contracting political subdivisions.

(c) Nothing in this constitution shall be construed to prohibit any political subdivision of the state from contracting with private persons, associations, or corporations for the provision of any legally authorized functions, services, or facilities within or without its boundaries.

(d) Nothing in this constitution shall be construed to prohibit the general assembly from providing by statute for state imposed and collected taxes to be shared with and distributed to political subdivisions of the state except that this provision shall not in any way limit the powers of home rule cities and towns.