Utah Code Ann. § 76-5-103
(1) Aggravated assault is an actor's conduct:
(a) that is:
(b) that includes the use of:
(ii) any act that impedes the breathing or the circulation of blood of another person by the actor's use of unlawful force or violence that is likely to produce a loss of consciousness by:
(2)
(a) Any act under this section is punishable as a third degree felony, except that an act under this section is punishable as a second degree felony if: