Colo. Rev. Stat. § 10-3-1305
No insurer shall specify the use of nonoriginal equipment replacement crash parts in the repair of an insured's motor vehicle without disclosing the intended use of such parts to the insured. In all instances where nonoriginal equipment replacement crash parts are intended for use by an insurer, the written estimate shall clearly identify each such part as being a nonoriginal equipment replacement crash part, and a disclosure document containing the following information in ten-point type or larger type shall appear on or be attached to the insured's copy of the estimate: "This estimate has been prepared based on the use of one or more crash parts supplied by a source other than the manufacturer of your motor vehicle. Warranties, if any, applicable to these replacement crash parts are provided by the parts manufacturer or distributor rather than by the manufacturer of your vehicle."
C.R.S. § 10-3-1305