Section 61.516 - Jurisdiction to modify a determinationExcept as otherwise provided in s. 61.517, a court of this state may not modify a child custody determination made by a court of another state unless a court of this state has jurisdiction to make an initial determination under s. 61.514(1)(a) or (b) and:
(1) The court of the other state determines it no longer has exclusive, continuing jurisdiction under s. 61.515 or that a court of this state would be a more convenient forum under s. 61.520; or(2) A court of this state or a court of the other state determines that the child, the child's parents, and any person acting as a parent do not presently reside in the other state.