California Code, Labor Code - LAB § 925

(a) An employer shall not require an employee who primarily resides and works in California, as a condition of employment, to agree to a provision that would do either of the following:

(b) Any provision of a contract that violates subdivision (a) is voidable by the employee, and if a provision is rendered void at the request of the employee, the matter shall be adjudicated in California and California law shall govern the dispute.

(c) In addition to injunctive relief and any other remedies available, a court may award an employee who is enforcing his or her rights under this section reasonable attorney's fees.

(d) For purposes of this section, adjudication includes litigation and arbitration.

(e) This section shall not apply to a contract with an employee who is in fact individually represented by legal counsel in negotiating the terms of an agreement to designate either the venue or forum in which a controversy arising from the employment contract may be adjudicated or the choice of law to be applied.

(f) This section shall apply to a contract entered into, modified, or extended on or after January 1, 2017.