California Laws|Section 3543.5.

                                                
3543.5.  
It is unlawful for a public school employer to do any of the following:
(a) Impose or threaten to impose reprisals on employees, to discriminate or threaten to discriminate against employees, or otherwise to interfere with, restrain, or coerce employees because of their exercise of rights guaranteed by this chapter.  For purposes of this subdivision, “employee” includes an applicant for employment or reemployment.
(b) Deny to employee organizations rights guaranteed to them by this chapter.  
(c) Refuse or fail to meet and negotiate in good faith with an exclusive representative.  Knowingly providing an exclusive representative with inaccurate information, whether or not in response to a request for information, regarding the financial resources of the public school employer constitutes a refusal or failure to meet and negotiate in good faith.
(d) Dominate or interfere with the formation or administration of any employee organization, or contribute financial or other support to it, or in any way encourage employees to join any organization in preference to another.
(e) Refuse to participate in good faith in the impasse procedure set forth in Article 9 (commencing with Section 3548).