Okla. Stat. tit. 70, § 70-17-116.9: Prior teaching service credit - Back contributions

Any member of the Teachers' Retirement System of Oklahoma, who

taught kindergarten on public school property prior to the state-

supported kindergarten, and who subsequently taught in the public

schools and has met the necessary qualifications, may receive credit

in the System for such teaching service by, prior to January 1,

1991, making back contributions of ten percent (10%) of salary plus

ten percent (10%) interest to the System as required by the Board of

Trustees. Effective January 1, 1991, to receive the credit in the

System for such teaching service, the member shall pay the amount

determined by the Board of Trustees pursuant to Section 17-116.8 of

this title.