Colorado Revised Statutes Title 31. Government Municipal § 31-30-205. Commission to make rules

The making or enforcement of rules to carry out the purpose of the classified civil service of such city or town, the alteration and discharge of such rules, the conducting of all competitive tests and determination of all removals or discharge cases, and the standardization in such classified civil service shall be vested in the commission. No person in the classified civil service shall be paid until a certificate is made by the commission that his appointment is made pursuant to law.