C.R.S. § 6-1-204

(1) No collision damage waiver subject to this part 2 shall contain an exclusion from the waiver for damages caused by the ordinary negligence of the lessee. Any such exclusion in violation of this section will be void and is a deceptive trade practice under this article. This section shall not be deemed to prohibit an exclusion from the waiver for damages caused by the lessee by: (a) Willful and wanton conduct or misconduct; (b) Intoxication by alcohol or use of controlled substances as defined in section 42-4-1301 , C.R.S.; (c) Participation in a speed contest; (d) Carrying persons or property for hire, or pushing or towing anything; (e) Use of the vehicle while committing a misdemeanor or felony or other criminal act; (f) Use of the vehicle by an unauthorized driver, which includes any person not specifically authorized by the rental agreement; (g) Supplying information which is false concerning the rental transaction with intent to defraud the lessor; (h) Use of the vehicle outside the continental United States, unless specifically authorized by the rental agreement; and (i) Any instance whereby, during the rental of such rental motor vehicle, the speedometer or odometer is tampered with or disconnected.