Okla. Stat. tit. 11, § 11-51-112: Matters requiring appropriation of moneys - Notice

Whenever wages, rates of pay or any other matters requiring

appropriation of moneys by any municipality are included as matters

of collective bargaining conducted under the provisions of this

article, it is the obligation of the bargaining agent to serve

written notice of request for collective bargaining on the corporate

authorities at least one hundred twenty (120) days before the last

day on which moneys can be appropriated by the municipality to cover

the contract period which is the subject of the collective

bargaining procedure.