Okla. Stat. tit. 12A, § 12A-1-302: Variation by agreement

Variation by Agreement.

(a) Except as otherwise provided in subsection (b) of this

section or elsewhere in the Uniform Commercial Code, the effect of

the Uniform Commercial Code may be varied by agreement.

(b) The obligations of good faith, diligence, reasonableness,

and care prescribed by the Uniform Commercial Code may not be

disclaimed by agreement. The parties, by agreement, may determine

the standards by which the performance of those obligations is to be

measured if those standards are not manifestly unreasonable.

Whenever the Uniform Commercial Code requires an action to be taken

within a reasonable time, a time that is not manifestly unreasonable

may be fixed by agreement.

(c) The presence in certain provisions of the Uniform

Commercial Code of the phrase “unless otherwise agreed” or words of

similar import does not imply that the effect of other provisions

may not be varied by agreement under this section.