Okla. Stat. tit. 12A, § 12A-2-309: Absence of Specific Time Provisions; Notice of

Termination.

(1) The time for shipment or delivery or any other action under

a contract if not provided in this article or agreed upon shall be a

reasonable time.

(2) Where the contract provides for successive performances but

is indefinite in duration it is valid for a reasonable time but

unless otherwise agreed may be terminated at any time by either

party.

(3) Termination of a contract by one party except on the

happening of an agreed event requires that reasonable notification

be received by the other party and an agreement dispensing with

notification is invalid if its operation would be unconscionable.