Under C.R.S. 14-10-131, a Colorado domestic relations court shall not modify decision-making responsibility absent a change in circumstances making the modification necessary to serve the best interests of the child. The standard for modifying decision-making responsibility is similar to modifying the majority parent - the established allocation of decision-making responsibility should be retained unless:

1. The parties agree to the modification,
2. The child has been integrated into the requesting party's family with the consent of the other party, and the integration warrants the change,
3. There was a modification of parenting time which justifies the change,
4. One party has consistently allowed the other to make unilateral decisions for the child, or
5. The child is endangered by the current allocation of decision-making responsibility, and the advantage of changing residence outweighs any harm such a change would cause.