Making changes to a prior agreement, court order or decree.– A.R.S. § 25-411: A person shall not make a motion to modify a legal decision-making or parenting time decree earlier than one year after its date, unless there is reason to believe the child’s present environment may seriously endanger the child’s physical, mental, moral or emotional health. After one year, a person may make a motion to modify a legal decision-making or parenting time decree if (1) there has been a substantial and continuing change of circumstances and (2) the moving party can demonstrate that such a modification is in the child’s best interests.