(a) Except as otherwise provided in section 20-204, a court of this state which has made a child custody determination consistent with section 20-201 or 20-203 has exclusive, continuing jurisdiction over the determination until:
(1) A court of this state determines that neither the child, the child and one parent, nor the child and a person acting as a parent 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