Okla. Stat. tit. 70, § 70-4308: Act not to affect prior obligations, proceedings,

transactions, actions or rights accrued.

Nothing in this act, nor the repeal of any law or part of a law

by this act, shall affect the validity of any obligation or contract

incurred, or proceedings begun, or any official actions taken, or

any rights accrued, before this act becomes effective. The payment

of bonds and other obligations outstanding when this act becomes

effective shall be governed by the laws under which such bonds were

issued or such obligations were incurred.