Utah Code § 6-2-122

(1) Except as provided in this section and Subsection 6-2-109(2), the provisions of this chapter may not be varied by agreement. (2) (a) The duties under Subsections 6-2-107(1) and 6-2-108(1) may not be disclaimed by agreement. (b) An assignor and the assignee may determine by agreement the standards measuring the fulfillment of the duties of the assignor under Section 6-2-107 and the assignee under Section 6-2-108 if the standards are not manifestly unreasonable. (3) Except as provided in Subsection 6-2-116(4), the assignment agreement may limit the assignee's liability under Section 6-2-116 and may require the assignee be indemnified by the assignment estate. (4) Except as provided under Subsection 6-2-106(1), whenever this chapter requires an action to be taken within a reasonable time, a time not manifestly unreasonable may be fixed by agreement. (5) The assignment agreement may provide for duties of the assignee in addition to those in this chapter.