The owner, agent or lessee of any property used as a bakery, food warehouse or food manufacturing establishment shall, within thirty days after the service of notice upon him or her of an order issued by the Commissioner of Consumer Protection, comply therewith or cease to use or allow the use of such premises as a bakery, food warehouse or food manufacturing establishment. Such notice shall be in writing and may be served upon such owner, agent or lessee, either personally or by mail, and a notice by registered or certified letter, mailed to the last-known address of such owner, agent or lessee, shall be sufficient service.