My wife has an L2 which we had approved last year that is valid until 2014. We left the country in May 2012. We are returning this year in June 2013 (with the same employer) and she will have the same visa status: L2. Can she effectively begin work immediately and legally using the original EAD that is valid until 2014 or does she need to refile for a new EAD on the new L2.