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