Okla. Stat. tit. 12A, § 12A-2-210

Delegation of Performance; Assignment of Rights.

(1) A party may perform his duty through a delegate unless

otherwise agreed or unless the other party has a substantial

interest in having his original promisor perform or control the acts

required by the contract. No delegation of performance relieves the

party delegating of any duty to perform or any liability for breach.

Oklahoma Statutes - Title 12A. Uniform Commercial Code Page 193

(2) Except as otherwise provided in Section 1-9-406 of this

title, unless otherwise agreed all rights of either seller or buyer

can be assigned except where the assignment would materially change

the duty of the other party, or increase materially the burden or

risk imposed on him by his contract, or impair materially his chance

of obtaining return performance. A right to damages for breach of

the whole contract or a right arising out of the assignor's due

performance of his entire obligation can be assigned despite

agreement otherwise.

(3) The creation, attachment, perfection, or enforcement of a

security interest in the seller’s interest under a contract is not a

transfer that materially changes the duty of or increases materially

the burden or risk imposed on the buyer or impairs materially the

buyer’s chance of obtaining return performance within the purview of

paragraph (2) of this section unless, and then only to the extent

that enforcement actually results in a delegation of material

performance of the seller. Even in that event, the creation,

attachment, perfection, and enforcement of the security interest

remain effective, but (i) the seller is liable to the buyer for

damages caused by the delegation to the extent that the damages

could not reasonably be prevented by the buyer, and (ii) a court

having jurisdiction may grant other appropriate relief, including

cancellation of the contract for sale or an injunction against

enforcement of the security interest or consummation of the

enforcement.

(4) Unless the circumstances indicate the contrary a

prohibition of assignment of "the contract" is to be construed as

barring only the delegation to the assignee of the assignor's

performance.

(5) An assignment of "the contract" or of "all my rights under

the contract" or an assignment in similar general terms is an

assignment of rights and unless the language or the circumstances

(as in an assignment for security) indicate the contrary, it is a

delegation of performance of the duties of the assignor and its

acceptance by the assignee constitutes a promise by him to perform

those duties. This promise is enforceable by either the assignor or

the other party to the original contract.

(6) The other party may treat any assignment which delegates

performance as creating reasonable grounds for insecurity and may

without prejudice to his rights against the assignor demand

assurances from the assignee (Section 2-609).