C.R.S. § 42-4-1303

Official records of the department of public health and environment relating to certification of breath test instruments, certification of operators and operator instructors of breath test instruments, certification of standard solutions, and certification of laboratories shall be official records of the state, and copies thereof, attested by the executive director of the department of public health and environment or the director’s deputy and accompanied by a certificate bearing the official seal for said department that the executive director or the director’s deputy has custody of said records, shall be admissible in all courts of record and shall constitute prima facie proof of the information contained therein. The department seal required under this section may also consist of a rubber stamp producing a facsimile of the seal stamped upon the document.