D.6 In accordance with the Fire Dept. and for your own security, all apartment doors leading to the common areas must be kept closed at all times including laundry, trash room, and stairway exit doors. No personal articles, such as doormats, shopping carts, plants, etc. may be kept in hallways or stairwells at any time. Air Conditioning closets may not be used for storage of any kind. No flammable or explosive materials are to be stored at any time. Smoking is prohibited in all common areas, including fire stairways.