California Code, Government Code - GOV § 3520.5

(a) The state shall grant exclusive recognition to employee organizations designated or selected pursuant to rules established by the board for employees of the state or an appropriate unit thereof, subject to the right of an employee to represent himself.

(b) The board shall establish reasonable procedures for petitions and for holding elections and determining appropriate units pursuant to subdivision (a).

(c) The board shall also establish procedures whereby recognition of employee organizations formally recognized as exclusive representatives pursuant to a vote of the employees may be revoked by a majority vote of the employees only after a period of not less than 12 months following the date of such recognition.