Okla. Stat. tit. 12A, § 12A-2-609: Right to Adequate Assurance of Performance

(1) A contract for sale imposes an obligation on each party that

the other's expectation of receiving due performance will not be

impaired. When reasonable grounds for insecurity arise with respect

to the performance of either party the other may in writing demand

adequate assurance of due performance and until he receives such

assurance may if commercially reasonable suspend any performance for

which he has not already received the agreed return.

(2) Between merchants the reasonableness of grounds for

insecurity and the adequacy of any assurance offered shall be

determined according to commercial standards.

(3) Acceptance of any improper delivery or payment does not

prejudice the aggrieved party's right to demand adequate assurance

of future performance.

(4) After receipt of a justified demand failure to provide

within a reasonable time not exceeding thirty (30) days such

assurance of due performance as is adequate under the circumstances

of the particular case is a repudiation of the contract.