C.R.S. § 16-2.5-144

A Colorado National Guardsman is a peace officer while acting under call of the governor in cases of emergency or civil disorder. His or her authority shall be limited to the period of call-up specified by the governor and shall be exercised only if the executive order of the governor calling the National Guard to state duty specifies that enforcement of the laws of the state of Colorado is a purpose for the call-up.