俄罗斯签证注册

Every foreigner who comes to Russia should have his/her Russian visa registered within 7 working days upon arrival, excluding holidays and weekends. Before it is 7 days after your arrival, your tickets (train, bus, plane tickets) to the place you're in (e.g. Moscow) is the document, which can confirm how long you've been staying there.
Please, note, that before 25 March 2011 you had to be registered within 72 hours upon arrival (excluding weekends and holidays), so it might be that not all the authorities are aware about this new rule yet.

是不是到达俄罗斯7个工作日之内必须注册，但不是在每一个到达的城市都需要注册？
比如在伊尔库茨克呆三天，在新西伯利亚呆一天，第七个工作日到达莫斯科，那么这样我只需在莫斯科注册即可？