For example, the interview cannot be modified if it is part of a private contract (separation agreement), unless the parties involved agree to modify the document by an amendment or a new separation agreement. Both would require the notarized signatures of each party. However, if the maintenance conditions are included in a court order, the conditions may be changed by a court if a substantial change in circumstances arises. Another example may be to change the custody terms in an unregistsed separation agreement (a private contract) by a court if one of the parties files a custody appeal, which would result in the court being tasked with adopting a custody provision on the basis of the best interests of the minor child concerned. . . .