Cal. Gov't Code § 3543
(a) Public school employees shall have the right to form, join, and participate in the activities of employee organizations of their own choosing for the purpose of representation on all matters of employer-employee relations. Public school employees shall have the right to represent themselves individually in their employment relations with the public school employer, except that once the employees in an appropriate unit have selected an exclusive representative and it has been recognized pursuant to Section 3544.1 or certified pursuant to Section 3544.7, an employee in that unit shall not meet and negotiate with the public school employer. If the exclusive representative of a unit provides notification, as specified by subdivision (a) of Section 3546, public school employees who are in a unit for which an exclusive representative has been selected, shall be required, as a condition of continued employment, to join the recognized employee organization or to pay the organization a fair share services fee, as required by Section 3546. If a majority of the members of a bargaining unit rescind that arrangement, either of the following options shall be applicable: