California Code, Welfare and Institutions Code - WIC § 4668

(a) Any action taken by a regional center governing board in violation of this article is null and void.  Any interested person may commence an action by mandamus, injunction, or declaratory relief for the purpose of obtaining a judicial declaration that an action taken in violation of this article is null and void.

(b) A court may award court costs and reasonable attorney's fees to the plaintiff in an action brought pursuant to this section where it is found that a regional center board has violated the provisions of this article.

(c) This section does not prevent a regional center governing board from curing or correcting an action challenged pursuant to this section.