CA Pub Util Code Section 120504

(a)

A contract or agreement shall not be made with any labor organization, association, or group that denies membership to, or in any manner discriminates against, any employee on any basis listed in subdivision (a) of Section 12940 of the Government Code, as those bases are defined in Sections 12926 and 12926.1 of the Government Code.

(b)

The board shall not discriminate with regard to employment against any person on any basis listed in subdivision (a) of Section 12940 of the Government Code, as those bases are defined in Sections 12926 and 12926.1 of the Government Code, except as otherwise provided in Section 12940 of the Government Code.