Section 78B-12-109 - Waiver and estoppel(1) Waiver and estoppel shall apply only to the custodial parent when there is no order already established by a tribunal if the custodial parent freely and voluntarily waives support specifically and in writing.(2) Waiver and estoppel may not be applied against any third party or public entity that may provide support for the child.(3) A noncustodial parent, or alleged biological father in a paternity action, may not rely on statements made by the custodial parent of the child concerning child support unless the statements are reduced to writing and signed by both parties.Renumbered and Amended by Chapter 3, 2008 General Session .