Utah Code Ann. § 70A-2a-406
(1) If the lessee receives notification of a material or indefinite delay or an allocation justified under Section 70A-2a-405, the lessee may by written notification to the lessor as to any goods involved, and with respect to all of the goods if under an installment lease contract the value of the whole lease contract is substantially impaired as provided in Section 70A-2a-510:
Enacted by Chapter 197, 1990 General Session