Cal. Health & Safety Code § 18927

The commission may appoint from the design professions, the building and construction industry, the affected general public, and interested governmental agencies, appropriate advisory panels to advise the commission and its staff with respect to building standards. The persons appointed to the panels shall be specifically knowledgeable and qualified in the type of work embraced by the building standards in question. These persons shall serve without compensation, but may receive actual necessary travel expenses.