Except in response to a temporary interruption of a water supply in the food establishment, any food establishment which is not a food delivery service, mobile food unit, or temporary food establishment shall:
(1) Have water under pressure provided to all fixtures, equipment, and nonfood equipment that are required to use water;
(2) Receive water through the use of an approved water main;
(3) Have a permanent plumbing system; and
(4) Have at least one toilet which is permanent, convenient, and accessible.