Okla. Stat. tit. 20 § 1308
Clerks in counties having a population of less than seventy thousand (70,000) must transmit each quarter for deposit in the State Judicial Revolving Fund the amount by which the receipts deposited in the court fund for the quarter, including the interest earned on the court fund, exceeds the expenses for the quarter, provided the court clerk shall retain from the excess amount a sum equal to twenty percent (20%) of the expenses for the quarter. Clerks in counties having a population of seventy thousand (70,000) or more shall transmit each month for deposit in the State Judicial Revolving Fund the amount by which the receipts deposited in the court fund for the reporting period for the report required by Section 1307 of this title, including interest earned on the court fund, exceeds the expenses for the reporting period, provided the clerk shall retain from the excess amount a sum equal to twenty percent (20%) of the expenses for the reporting period. Within thirty (30) days after the end of each fiscal year, the court clerk, in addition to the other amounts due hereunder, shall transmit to the Supreme Court for deposit in the State Judicial Revolving Fund an amount equal to the gross receipts for the entire past fiscal year less the total amount of expenses, as defined in subsection A of Section 1307 of this title, and less the transfers made for the past fiscal year.
Okla. Stat. tit. 20, § 1308