If you look on the checklist in the PPL PTS booklet, FAA-S-8081-14A, it has a current AIM as an item you should have. To get to the point of your question. I was told as long as you can look it up it is ok. The only concern is having to look up too much. In my mock oral I had to look up what the solid black lines on the sectional signify. I did not know so I refered to the legend. Well they are the boundry of a TRSA. Now I know.