Okla. Admin. Code § 810:25-11-9
On the association's effective date, the premium deposit of at least twenty-five percent (25%) of the first year's discounted premium payable by each member of the association, shall have been paid into a designated depository, which shall certify receipt of same to the Commission. The balance of the first year's premium shall be paid, either in quarterly or monthly installments at the discretion of the board, no later than the end of the ninth month of the association's fiscal year. For subsequent years, the board of each association shall determine the amount of advance deposit required, or if the deposit shall remain permanent, with distribution only after termination of the membership and all premium audits and adjustments completed, and all premiums due paid in full. The Commission may require an association to make its deposits permanent.
Okla. Admin. Code § 810:25-11-9