California Code, Education Code - EDC § 45224

The governing board of a school district whose average daily attendance is 3,000 or more may, by affirmative vote of a majority of its members, and a county superintendent of schools, with the consent of the majority of the members of the county board of education, adopt the procedure set forth in Article 6 (commencing with Section 45240) of this chapter, provided a lawful petition has not been received as authorized in Section 45221, or may adopt the procedure at any time after a two-year period has elapsed following an unsuccessful election conducted in accordance with Section 45221 of this code.

The motion, order, or resolution for adoption of the procedure shall specify the date that the provisions of Article 6 shall be applicable to classified employees, which shall not be later than July 1 next following the date of adoption.