Okla. Stat. tit. 31, § 1.3

The determination and order issued by the court pursuant to a hearing requested under Section 1.1 of this title shall not take into consideration any total gross family income which exceeds one hundred twenty times the federal minimum hourly wage prescribed by Section 6(a)(1) of the Fair Labor Standards Act of 1938, U.S.C. Title 29, Section 206(a)(1) as amended and in effect at the time the earnings are payable or the equivalent for pay periods other than one (1) week. The excess amounts shall not be subject to exemption due to undue hardship.