2011 Utah Code
Title 34 Labor in General
Chapter 23 Employment of Minors
Section 202 Employment of minors under 16 during school hours -- Hours of work limited.

34-23-202. Employment of minors under 16 during school hours -- Hours of work limited.
(1) A minor under the age of 16 may not be employed or permitted to work during school hours except as authorized by the proper school authorities.
(2) A minor under the age of 16 may not be permitted to work:
(a) before or after school in excess of four hours a day;
(b) before 5:00 a.m. or after 9:30 p.m., unless the next day is not a school day;
(c) in excess of eight hours in any 24-hour period; or
(d) more than 40 hours in any week.