(1) Except as provided in Sentence (2), floors and floor coverings shall be tight, smooth and non-absorbent in rooms where,
(a) food or drink for human consumption, or an ingredient of food or drink for human consumption, is manufactured, processed, prepared, stored, displayed, handled, served, distributed, sold or offered for sale,
(b) utensils are washed, or
(c) washing fixtures or toilet fixtures are located.
(2) Carpeting may be used in areas where food is served.
(3) Wall and ceiling finishes of rooms and passageways shall be easy to clean.