3 Colo. Code Regs. § 708-1-20.5
Whenever a charge of discrimination is filed with the Division, all parties shall maintain all relevant records in their custody, control, or possession until final disposition. Relevant records include, but are not limited to, the following: personnel or employment records of a Charging Party and of all employees holding similar positions; applications or test papers and assessments of all candidates for the positions sought by the Charging Party; payroll records; handbooks; registration records; offers; leases; contracts; tenant files; rental applications; loan and purchase files; advertisements; data regarding protected classes; disability-related and medical records; policies and procedures; notices; phone records; bank and accounting records; photographs; videos; correspondence; emails; electronic records; and other business or institutional records relevant to the allegations of the charge. Final disposition of the charge or complaint occurs when the statutory time periods for all appeals have expired.
The failure to comply with this regulation shall create a rebuttable presumption that the records contained information adverse to the interests of the non-compliant party.
3 CCR 708-1-20.5