I borrowed old charts as surely they don't re-write the questions every time an airway changes! Worked for me for flight planning and nav with no issues. My AIP and ERSA were also from 2011, and I used them for law and nav with no issues. I sat nav a couple of months ago. Don't think I actually had any questions from the AIP or ERSA in my nav exam at all, but you can get VOR/ NDB rated coverage questions I think