Okla. Stat. tit. 56, § 56-240.9: Filing cases involving concurrent jurisdiction -

Enforcement of foreign orders.

In filing cases involving concurrent jurisdiction between the

administrative proceedings of the Department of Human Services and

the district court, the cases shall be filed in the administrative

proceedings of the Department of Human Services. The Department of

Human Services, by regulation, may establish exceptions from this

requirement subject to federal approval.

Child support orders originating from other states shall be

enforced to the same extent as orders originating within this state.

Said orders to be filed in the county of residence of the obligor or

in the county of residence of the person entitled to support.