The enactment of the 1999 revisions to this article does not constitute substantially changed circumstances for the purposes of modifying decrees involving child custody, parenting time, or grandparent visitation. Any action to modify any decree involving child custody, parenting time, grandparent or great-grandparent visitation, or a parenting plan shall be governed by the provisions of this article.
C.R.S. § 14-10-131.8