Okla. Stat. tit. 43, § 43-551-203: Jurisdiction to modify determination

JURISDICTION TO MODIFY DETERMINATION

Except as otherwise provided in Section 16 of this act, 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 paragraph 1 or 2 of

subsection A of Section 13 of this act and:

1. The court of the other state determines it no longer has

exclusive, continuing jurisdiction under Section 14 of this act or

that a court of this state would be a more convenient forum under

Section 19 of this act; 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.