California Code, Health and Safety Code - HSC § 18945

(a) Any person adversely affected by any regulation, rules, omission, interpretation, decision, or practice of any state agency respecting the administration of any building standard may appeal the issue for resolution to the commission.

(b) If any local agency having authority to enforce a state building standard and any person adversely affected by any regulation, rule, omission, interpretation, decision, or practice of such agency respecting such building standard both wish to appeal the issue for resolution to the commission, then both parties may appeal to the commission.  The commission may accept such appeal only if the commission determines that the issues involved in such appeal have statewide significance.