A minor may not work more than 6 days in a week. • Approval may be granted for 16- and 17- year-olds to work beyond the starting and.Approval may be granted for 16 and 17-year-old minors to work beyond the starting and ending times specified in the act. 16-17 year olds may work until p.m. When not regularly enrolled in school and during school vacation period. Employment of minors 16 years of age or older is generally prohibited between the hours of p.m. Work certificates are not required for 16 and 17yearolds. Adult supervision is required, at all times. Who Needs a CA-7 Yellow Work Permit? Employer Information: - The employer must have a completed front and back yellow work permit form on file before a minor begins work.