Utah Code Ann. § 11-13-203
(1) An interlocal entity is:
(3)
(a) A Utah public agency and one or more public agencies may enter into an agreement to approve the creation of an electric interlocal entity to accomplish the purpose of their joint or cooperative action if that purpose is to participate in the undertaking or financing of:
(b) By agreement with one or more public agencies that are not parties to the agreement creating it, a Utah interlocal entity may be reorganized as an electric interlocal entity if:
(4)
(b)