Cal. Gov. Code § 3599.81

Notwithstanding any other law, the expression of any views, arguments, or opinions, or the dissemination thereof in any form, by a Member of the Legislature or an employee, including any employee specified in subparagraphs (B) to (E), inclusive, of paragraph (1) of subdivision (b) of Section 3599.52, related to this chapter or to matters within the scope of representation, shall not constitute, or be evidence of, an unfair labor practice, unless the employer authorized the individual to express that view, argument, or opinion on behalf of, or authorized the individual to represent, the employer as an employer.