California Code, Vehicle Code - VEH § 11219.5

(a) A traffic violator school shall issue a receipt for a fee collected by the traffic violator school from a person who registers for, attends, or completes a program of instruction in traffic safety at the licensed traffic violator school.

(b) In the event of a cancellation of a scheduled class, a licensee under this chapter shall not be required by the department to provide a program of instruction in traffic safety to a person for a fee that is less than the standard fee normally charged by the licensee for its program, if a notice of cancellation of a class is given to a student at least 72 hours prior to the start of the class, or if the class was canceled based upon exigent circumstances beyond the control of the licensee.