Colo. Rev. Stat. § 24-80-104
Records deemed by the public officer having custody thereof to be unnecessary for the transaction of the business of his or her office and yet deemed by the state archivist to be of legal, administrative, or historical value shall be transferred to the custody of the department of personnel or a storage vendor approved by the state archivist in accordance with the rules promulgated by the department of personnel pursuant to section 24-80-102 (12), and the state agency's records management program. A list of all records so transferred, together with a statement certifying compliance with this part 1, signed by the public officer, shall be preserved in the files of the office from which the records were drawn and in the files of the department of personnel.
C.R.S. § 24-80-104