Okla. Stat. tit. 19, § 19-955: Prorating in case of insufficiencies

If the funds in any retirement system are insufficient to make

full payment of the amount of retirement benefits or allowances to

any eligible persons under the rules and regulations of the board of

trustees then such fund shall be prorated among those entitled

thereto as the board of trustees administering said fund shall

determine to be just and equitable.