Almost all minors under the age of 18 are subject to California's child labor protections. All minors who have not graduated high school or been awarded a certificate of proficiency, must have a valid work permit.How do I find out more about the city ordinances that concern my property? All ordinances are contained within the Hillsborough Municipal Code. Children ages 12 and 13 can only work on days when there is no school. The law allows them to work up to eight hours a day and no more than 40 hours a week. Execution and Applicable Law – This agreement has been executed in Hillsborough,. Performs law enforcement and crime prevention work, controls traffic flow and enforces state and local regulations. Find the best elder law attorney serving Hillsborough. DSA Team Members are out and about in the affected communities, ready to take an application or answer questions.