This launches the main line of missions of the Citadel DLC. Be aware that just as in the main game, if you have not recruited Kaidan/Ashley, Javik or Tali into the squad (i.e. recruited the Virmire survivor after Priority: The Citadel II, finished Priority: Eden Prime, and completed Priority: Perseus Veil, respectively) they won't be available as squadmates for these missions either. Warning: You will have access to armor lockers and weapon benches at certain points, but any other preparations, such as purchases or power selections, cannot be made once you dock at the Personal Apartment.