Okla. Stat. tit. 70, § 17-120
The employer of each member shall deposit within ten (10) days of the last day of each calendar month all employer and employee contributions of each member due the Retirement System for payroll periods ending during the calendar month. Employer and employee contribution amounts not paid to the Retirement System after thirty (30) days from the end of the payroll month shall be subject to a monthly late charge of one and one-half percent (1 1/2%) of the unpaid balance to be paid by the employer to the Retirement System.
Laws 1992, SB 568, c. 376, § 11, emerg. eff. July 1, 1992.