Okla. Stat. tit. 43, § 43-601-606: Procedure to contest validity or enforcement of

registered order

A. A nonregistering party seeking to contest the validity or

enforcement of a registered support order in this state shall

request a hearing within the time required by Section 601-605 of

this title. The nonregistering party may seek to vacate the

registration, to assert any defense to an allegation of

noncompliance with the registered support order, or to contest the

remedies being sought or the amount of any alleged arrearages

pursuant to Section 601-607 of this title.

B. If the nonregistering party fails to contest the validity or

enforcement of the registered support order in a timely manner, the

order is confirmed by operation of law.

C. If a nonregistering party requests a hearing to contest the

validity or enforcement of the registered support order, the

registering tribunal shall schedule the matter for hearing and give

notice to the parties of the date, time, and place of the hearing.