Okla. Stat. tit. 12A, § 2A-208
Oklahoma Code Comment
To the extent of inconsistency this provision displaces 15 Oklahoma Statutes §§ 236 and 237 for leases of goods. Thus while subsection (1) is consistent with § 236 for oral leases in not requiring new consideration for a modification, it conflicts with § 237, which for written contracts requires consideration. Moreover, § 237 allows alteration by an executed oral agreement while under § 2A-208(2) the parties can preclude modification or rescission except by another signed writing. Finally, while alteration by a contract in writing is a method recognized by § 237, § 237 does not stipulate, as does subsection (2) of § 2A-208, that a signed lease agreement that excludes modification or rescission except by another signed writing must, unless between merchants, have that requirement separately signed by the other party if the requirement is included in a form supplied by a merchant. This last safeguard also exists in UCC § 2-209 (12A Oklahoma Statutes § 2-209) upon which § 2A-208 is based, and represents one of the few consumer protections included in UCC Article 2. See Miller, Consumer Leases Under Uniform Commercial Code Article 2A, 39 Ala.L.Rev. 967, 960 (1988).
The 1991 amendments make no change here.