Okla. Stat. tit. 43, § 43-601-611

A. If Section 601-613 of this title does not apply, upon

petition a tribunal of this state may modify a child support order

issued in another state which is registered in this state if, after

notice and hearing, the tribunal finds that:

1. The following requirements are met:

a. neither the child, nor the obligee who is an

individual, nor the obligor resides in the issuing

state,

b. a petitioner who is a nonresident of this state seeks

modification, and

c. the respondent is subject to the personal jurisdiction

of the tribunal of this state; or

2. This state is the residence of the child, or a party who is

an individual is subject to the personal jurisdiction of the

tribunal of this state, and all of the parties who are individuals

have filed consents in a record in the issuing tribunal for a

tribunal of this state to modify the support order and assume

continuing, exclusive jurisdiction.

B. Modification of a registered child support order is subject

to the same requirements, procedures, and defenses that apply to the

modification of an order issued by a tribunal of this state and the

order may be enforced and satisfied in the same manner.

C. A tribunal of this state may not modify any aspect of a

child support order that may not be modified under the law of the

issuing state, including the duration of the obligation of support.

If two or more tribunals have issued child support orders for the

same obligor and same child, the order that controls and must be so

recognized under Section 601-207 of this title establishes the

aspects of the support order which are nonmodifiable.

D. In a proceeding to modify a child support order, the law of

the state that is determined to have issued the initial controlling

order governs the duration of the obligation of support. The

obligor's fulfillment of the duty of support established by such

order precludes imposition of a further obligation of support by a

tribunal of this state.

E. On issuance of an order by a tribunal of this state

modifying a child support order issued in another state, the

Oklahoma Statutes - Title 43. Marriage and Family Page 201

tribunal of this state becomes the tribunal having continuing,

exclusive jurisdiction.

F. Notwithstanding subsections (a) through (e) and subsection B

of Section 601- 201 of this title, a tribunal of this state retains

jurisdiction to modify an order issued by a tribunal of this state

if:

1. One party resides in another state; and

2. The other party resides outside the United States.