C.R.S. § 14-13-202

(1) Except as otherwise provided in section 14-13-204 , a court of this state that has made a child-custody determination consistent with section 14-13-201 or 14-13-203 has exclusive, continuing jurisdiction over the determination until: (a) A court of this state determines that the child, the child’s parents, and any person acting as a parent do not have a significant connection with this state and that substantial evidence is no longer available in this state concerning the child’s care, protection, training, and personal relationships; or (b) A court of this state or a court of another state determines that the child, the child’s parents, and any person acting as a parent do not presently reside in this state. (2) A court of this state that has made a child-custody determination and does not have exclusive, continuing jurisdiction under this section may modify that determination only if it has jurisdiction to make an initial determination under section 14-13-201 .