(1) Except as otherwise provided in s. 61.517, a court of this state which has made a child custody determination consistent with s. 61.514 or s. 61.516 has exclusive, continuing jurisdiction over the determination until:
(a) A court of this state determines that the child, the child’s parents, and any person acting as a parent do not have a significant connection with this state and that substantial evidence is no longer available in this state concerning the child’s care, protection, training, and personal relationships; or
(b) A court of this state or a court of another state determines that the child, the child’s parent, and any person acting as a parent do not presently reside in this state.
(2) A court of this state which has made a child custody determination and does not have exclusive, continuing jurisdiction under this section may modify that determination only if it has jurisdiction to make an initial determination under s. 61.514.