Cal. Family Code - FAM § 5290. Section 5290.
No employer shall use an assignment order authorized by this chapter as grounds for refusing to hire a person, or for discharging, taking disciplinary action against, denying a promotion to, or for taking any other action adversely affecting the terms and conditions of employment of, an employee. An employer who engages in the conduct prohibited by this section may be assessed a civil penalty of a maximum of five hundred dollars ($500).