CALIFORNIA LABOR CODE §1310
“The Four Hour Rule”
1310. Nothing in this article or Article 2 (commencing with Section 1390) of Chapter 3 shall prohibit or prevent:
(a) The appearance of any minor in any church, public or religious school, or community entertainment.
(b) The appearance of any minor in any school entertainment or in any entertainment for charity or for children, for which no admission fee is charged.
(c) The appearance of any minor in any radio or television broadcasting exhibition, where the minor receives no compensation directly or indirectly therefore, and where the engagement of the minor is limited to a single appearance lasting not more than one hour, and where no admission fee is charged for the radio broadcasting or television exhibition.
(d) The appearance of any minor at any: one event during a calendar year occurring on a day on which school attendance is not required or on the day preceding such a day, lasting four hours or less, where a parent or guardian of the minor is present, for which the minor does not directly or indirectly receive any compensation.