The JAA does not determine the privileges of its licences, that is a matter (one of the few remaining) on which national governments in europe legislate.
What your UK issued JAA licence entitles you to do (wherever in the world you fly) is detailed in the Air Navigation Order 2000 which, as a Statutory Instrument (SI 2000 No.1562), is the law of the land. Since ignorance of the law is not a defence in court, it might be wise to invest in/borrow/steal a copy and find out just what is legal and, more importantly, what is not.