Applications must be submitted no later than five days prior to the date that employment commences. Full Name of Employee (Include Middle Name):.Working Permit for Minors in Utah. Utah child labor laws. Minors under the age of 16. No one under the age of 18 may be employed in a hazardous job, though (see below). The U.S. Department of Labor's Wage and Hour Division (WHD) administers and enforces the federal child labor laws. Children as young as 10 are legally allowed to work in Utah. "While school is in session, someone under 16 can't work before or after school for more than 4 hours a day," Olsen explained. (b) is 16 years of age or older and is enrolled in a registered state or federal apprenticeship program.