Section 9--603. Agreement on Standards Concerning Rights and Duties.
    (a) Agreed  standards.  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  9--602
  if the standards are not manifestly unreasonable.
    (b) Agreed  standards  inapplicable to breach of peace. Subsection (a)
  does not apply  to  the  duty  under  Section  9--609  to  refrain  from
  breaching the peace.