Okla. Stat. tit. 43, § 43-601-210: Receipt of evidence from outside the state -

Applicable law

A tribunal of this state exercising personal jurisdiction over a

nonresident in a proceeding under the Uniform Interstate Family

Support Act, under other law of this state relating to a support

order or recognizing a foreign support order may receive evidence

from outside this state pursuant to Section 601-316 of this title,

communicate with a tribunal outside this state pursuant to Section

601-317 of this title, and obtain discovery through a tribunal

outside this state pursuant to Section 601-318 of this title. In

all other respects, Articles 3 through 6 of this title do not apply

and the tribunal shall apply the procedural and substantive law of

this state.