Section 9. In every public eating or drinking place, kitchens, dining rooms, cellars, ice-boxes, refrigerators and all places where foods are prepared, kept or stored and all kitchen-ware, table-ware, glass-ware, cutlery, utensils, containers or other utensils and machinery used in moving, handling, cutting, mixing, preparing or serving foods shall be kept in a clean and sanitary condition and be protected from dust, dirt, insects and vermin in the manner prescribed by the regulations of the department. The clothing and hands of employes shall at all times be clean and sanitary. No domestic pets or other animals shall be permitted where food or drink is prepared, handled or stored. No person shall be permitted to use for sleeping purposes any room or place in any public eating or drinking place which is regularly and customarily used for the preparation, handling, storing or serving of food.