Okla. Stat. tit. 12A, § 4-102
Oklahoma Code Comment
In addition to the conflicts identified in this Section, items within Article 4 may be involved in an Article. In that case, the fraud exception in Section 5-114 may give way if the issuer of the letter of credit has accepted the drain. See All Service Exportacao, Importacao Comercio, S.A. v. Banco Bamerindus Do Brazil, S,A., 921 F.2d 32 (2d Cir. 1990).