Section 925 was enacted as a direct response to various work-arounds some employers have developed in the past, notably to circumvent certain unfavorable California laws, such as its general prohibition of non-competes and non-solicitation agreements (Cal. Bus and Prof. Code 16600, 16601, 16602, and 16602.5).
The full text of the provision is as follows --
SECTION 1. Section 925 is added to the Labor Code, to read:
(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:
(1) Require the employee to adjudicate outside of California a claim arising in California.
(2) Deprive the employee of the substantive protection of California law with respect to a controversy arising in California.
(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.
Open to interpretation includes the terms of when an employee "primarily resides and works in California", as well as the qualification of when the law of another state might "deprive the employee of the substantive protections of California law".