Utah Code § 75A-4-301: Requisites for exercise of power of appointment.

A power of appointment is exercised only:

(1) if the instrument exercising the power is valid under applicable law;

(2) if the terms of the instrument exercising the power:

(a) manifest the powerholder's intent to exercise the power; and

(b) satisfy the requirements of exercise, if any, imposed by the donor; and

(3) to the extent the appointment is a permissible exercise of the power.