Vt. Stat. Ann. tit. 15, § 1064

A child custody determination made by a Vermont court that had jurisdiction under this chapter binds all persons who have been served in accordance with the Vermont laws or notified in accordance with section 1066 of this title or who have submitted to the jurisdiction of the court, and who have been given an opportunity to be heard. As to those persons, the determination is conclusive as to all decided issues of law and fact except to the extent the determination is modified.