Colo. Rev. Stat. § 16-8-101.3
The intent of the general assembly in enacting section 16-8-101.5 and making conforming amendments to sections 16-8-101 to 16-8-104, 16-8-106, 16-8-110, 16-8-114, 16-8-115, and 16-8-120 in 1995, and in enacting clarifying provisions in this section and sections 16-8-104.5 and 16-8-105.5 and making conforming amendments to sections 16-8-105 and 16-8-107 and sections 18-1-802 and 18-1-803, C.R.S., in 1996, was to combine the defense of not guilty by reason of insanity and the affirmative defense of impaired mental condition into the affirmative defense of not guilty by reason of insanity and to create a unitary process for hearing the issues raised by said affirmative defense to apply to offenses committed on or after July 1, 1995.
C.R.S. § 16-8-101.3