Okla. Stat. tit. 43 § 551-203 : Marriage and Family —Uniform Child Custody Jurisdiction and Enforcement Act — Jurisdiction —203 - Jurisdiction to Modify Determination TEXT PDF 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. Okla. Stat. tit. 43, § 551-203 Added by Laws 1998, SB 1237, c. 407, §15, eff. 11/1/1998.