It is used to allow access to the following:
- It unlocks the door between the Incinerator and the Exit Passage of the sewers (only when exploring these areas as Ada during Leon's scenarios).
- It grants you access to the Cable Car on the Cable Car Platform in the sewers.
- It unlocks the main door of the NEST facility, granting you access from the facility's Cable Car Platform to the Reception area.
- It unlocks the door in the Visitor Corridor leading to the Cafeteria.
- It unlocks the doors in the General Staff Corridor leading to the Kitchen and the Nap Room.
