Mmmm ...
212man ....
Arrrr .... you see this is where it gets tricky ... 'cos Australia for instance Class A or B is in fact an Airworthiness classification which determines HOW you aircraft shall or may be maintained.
Do have JAR 3 (electronic version) find it excellent for sleeping problems!
..... and that might be my problem
Class A or B Drugs ... I think is a UK classification only ....