Notwithstanding the other provisions of this chapter, whenever the health officer finds insanitary or other conditions in a restaurant or bakery which, in his judgment, constitute an imminent and substantial hazard to the public health, he may without prior notice issue a written notification to the permittee citing such insanitary or other conditions specifying the corrective action to be taken, and order all food service operations to be immediately discontinued. Any permittee to which such an order is issued shall comply immediately therewith, but upon written petition to the health officer, shall be afforded a hearing within five days. (Prior gen. code § 3-170.5)