New York Consolidated Laws, Labor Law - LAB § 291. Cleanliness and safety of rooms

Every room in a factory and every part thereof and all fixtures therein shall at all times be kept in a safe and sanitary condition and in proper repair.  No person shall expectorate upon the walls, floors or stairs of a factory or of the building in which it is located.  Suitable receptacles shall be provided and used for the storage of waste and refuse.  The walls and ceiling of the rooms and hallways in every factory shall be kept in a clean condition.