All rooms of a locker plant or branch locker plant shall at all times be maintained in a clean and sanitary condition. All equipment and utensils shall be clean when put into use and shall be thoroughly cleansed after each day's use and shall be so stored or protected as not to become contaminated. Lockers shall be thoroughly cleansed before they are leased or put into the possession of any patron. The premises and surroundings of locker plants and branch locker plants shall be maintained in a clean and sanitary condition. The food stored shall be protected from filth, flies, dust, dirt, insects, vermin and any other contamination and from any unclean or filthy practice in the handling thereof or caring therefor. No food shall be stored in such condition or in such manner as to cause injury to or deterioration of articles of food in adjacent lockers. Tobacco shall not be used in any room where food is processed or stored. Waste or offal incident to the slaughtering, cleaning, storing or preparation of any food for storage shall be promptly removed from the premises and disposed of in a sanitary manner.

No room or rooms used for the preparation, storage, display or sale of food or for the processing of food shall be used as a living room or sleeping room nor shall dogs, cats or other domestic animals be permitted in any such room.