(a) The parties may determine by agreement the standards measuring the fulfillment of the rights of a debtor or obligor and the duties of a secured party under a rule stated in Section 55-9-602 N.M. Stat. Ann. if the standards are not manifestly unreasonable.

(b) Subsection (a) of this section does not apply to the duty under Section 55-9-609 N.M. Stat. Ann. to refrain from breaching the peace.