The commission shall maintain its headquarters in the County of Sacramento and may establish branch offices in such parts of the state as the commission deems necessary. The commission shall hold meetings at such times and at such places as shall be determined by it. All meetings and hearings of the commission shall be open to the public, and opportunity to be heard with respect to the subject of the hearings shall be afforded to any person. Upon request, an interested party may be granted reasonable opportunity to examine any witness testifying at the hearing. The first meeting of the commission shall be held within 30 days after the confirmation of the last member of the commission pursuant to Section 25204. The Governor shall designate the time and place for the first meeting of the commission.