Colo. Rev. Stat. § 32-9-122
It is the duty of the body having authority to levy taxes within each county or city and county of the district to levy the taxes provided in sections 32-9-120 and 32-9-121. It is the duty of all officials charged with the duty of collecting taxes to collect such taxes at the time and in the form and manner and with like interest and penalties as other taxes are collected, and when collected, to pay the same to the district. The payment of such collection shall be made as soon as practical after collection to the treasurer of the district and paid into the depository thereof to the credit of the district. All taxes levied under this article, together with interest thereon and penalties for default in payment thereof, and all costs of collecting the same, shall constitute, until paid, a perpetual lien on and against the property taxed, and such lien shall be on a parity with the tax lien of other taxes.
C.R.S. § 32-9-122
For collection of taxes, see article 10 of title 39.