Colorado Revised Statutes Title 14. Domestic Matters § 14-10-132. Affidavit practice

A party seeking the modification of a custody decree or a decree concerning the allocation of parental responsibilities shall submit, together with his or her moving papers, an affidavit setting forth facts supporting the requested modification and shall give notice, together with a copy of his or her affidavit, to other parties to the proceeding, who may file opposing affidavits. The court shall deny the motion unless it finds that adequate cause for hearing the motion is established by the affidavits, in which case it shall set a date for hearing on an order to show cause why the requested modification should not be granted.