Okla. Stat. tit. 12A, § 12A-4-102: Applicability

APPLICABILITY

(a) To the extent that items within this article are also

within Articles 3 and 8 of this title, they are subject to those

articles. If there is conflict, this article governs Article 3, but

Article 8 governs this article.

(b) The liability of a bank for action or nonaction with

respect to any item handled by it for purposes of presentment,

payment or collection is governed by the law of the place where the

bank is located. In the case of action or nonaction by or at a

branch or separate office of a bank, its liability is governed by

the law of the place where the branch or separate office is located.