IWC Orders, Section 11 and 12 states:
You have a right to a 10 minute break for every four hours worked.
When you work a shift in excess of five hours, you have the right to a 30 minute unpaid meal period. If your job is such that some duties must continue through the meal period, or you must be available to handle emergencies, you must be paid for the whole meal period. You must agree in writing to an on-duty meal period.