Almost all minors under the age of 18 are subject to California's child labor protections. The difference is the maximum work hours for these minors.Thus, 9 to16 year-olds who attend regular school may only work up to 3 hours on a schoolday. 16-year-old children cannot work more than 10 hours consecutive or more than 10 hours in a 24 hours period. 16 and 17yearolds may work up to 8 hours a day, up to 48 hours a week, and between a.m. MINORS AGES 16, 17 and Older. Minors ages 16 and older are exempt from the hour and scheduling restrictions. 16-17 age bracket- They can work for 4 hours in a day and 48 hours in a week during school days. 16 and 17yearolds are allowed to work between 5 a.m. 16 and 17: May work the same hours as those who are 18 years old.