I agree that the licence is an international one, and therefore you should learn international rules. However, the syllabus is full of which convention decided what, and what would you find in the AIP.
Ultimately, the AIP and AIC are reference documents. I think you should be able to take them into the exam, and they ask you specific rules to show you know how to use the reference material correctly and not misenturprate it (i'm sure the spelling police will be onto me about that one)
knowing that something was decided in tokyo in 1963 doesnt really help that much.