Okla. Const. art. V, § 55

Appropriations - Necessity and requisites. No money shall ever be paid out of the treasury of this State, nor any of its funds, nor any of the funds under its management, except in pursuance of an appropriation by law, nor unless such payments be made within two and one-half years after the passage of such appropriation act, and every such law making a new appropriation, or continuing or reviving an appropriation, shall distinctly specify the sum appropriated and the object to which it is to be applied, and it shall not be sufficient for such law to refer to any other law to fix such sum.