Sector 3 is divided up into a Sector 3A and 3B. This 5 degree tolerance people are talking about DOES not apply to a Sector 3A.
Eh ? It might be so at the school where you learnt, but that isn't what AIP has to say on the matter.
All turns in Sector 1 are max AOB
Same comment
Make sure you're very clear on the differences between what is required, what is advisable, and what has been handed to you by your instructor simply because that's what their instructor handed them