Utah Code § 76-9-104: Failure to disperse.

(1) Terms defined in Section 76-1-101.5 apply to this section.

(2) An actor commits failure to disperse if the actor:

(a) is at the scene of a riot, disorderly conduct, or an unlawful assembly; and

(b) remains at the scene of the riot, disorderly conduct, or unlawful assembly after having been ordered to disperse by a peace officer.

(3) A violation of Subsection (2) is a class C misdemeanor.

(4) This section does not apply to an actor who attempts to leave the scene of a riot, disorderly conduct, or unlawful assembly but is unsuccessful in leaving the scene.