(A)   No meals may be prepared in a rooming house other than in a dwelling unit contained therein, except that this section shall not apply to the eating of meals in establishments which hold valid restaurant licenses issued by the Health Department and which have the rooming house and restaurant operations integrated as a single business enterprise.
   (B)   The operator of any rooming house shall post in a conspicuous place a sign on which shall be written or printed in letters not less than three-eighths of one inch in height the following words: "No Cooking in Rooms Used For Sleeping Purposes". The sign shall remain so posted at all times.
(1967 Code, §§ 9-69, 9-70)  Penalty, see § 10.99