California Code, Corporations Code - CORP § 7231.5

(a) Except as provided in Section 7233 or 7236, there is no monetary liability on the part of, and no cause of action for damages shall arise against, any volunteer director or volunteer executive officer of a nonprofit corporation subject to this part based upon any alleged failure to discharge the person's duties as a director or officer if the duties are performed in a manner that meets all of the following criteria:

(b) “Volunteer” means the rendering of services without compensation. “Compensation” means remuneration whether by way of salary, fee, or other consideration for services rendered.  However, the payment of per diem, mileage, or other reimbursement expenses to a director or executive officer does not affect that person's status as a volunteer within the meaning of this section.

(c) “Executive officer” means the president, vice president, secretary, or treasurer of a corporation or other individual serving in like capacity who assists in establishing the policy of the corporation.

(d) This section shall apply only to trade, professional, and labor organizations incorporated pursuant to this part which operate exclusively for fraternal, educational, and other nonprofit purposes, and under the provisions of Section 501(c) of the United States Internal Revenue Code.

(e) This section shall not be construed to limit the provisions of Section 7231.