Oh, yeah, you DEFINITELY need to memorize, like...REALLY WELL, the referral guidelines. But you also need to pay attention to things like what you can/can't do in terms of advertising. Pay attention to the clinical stuff, but it is awfully hard to "logic" your way through a question that is solely a matter of written law. It's like this...
Given a person's birthday, how long do you have to give that person a gift before it is considered "late" or an "after thought"?
a) 1 day
b) 5 days
c) 7 days
d) 10 days
e) 14 days
f) 30 days
Like...you can sorta reason your way through it, but the "right" answer is not readily apparent if you didn't read it in the law book. Best of luck!