Not quite right.
The JAA is a collection of National Aviation Authorities. Whilst the JAA have a headquarters in Hoofddorp Holland, there is no Europe wide governing body.
The JARs are requirements agreed in committee and adopted by the various JAA member States.
JAA licences are issued by individual JAA States to a common standard laid down in JAR-FCL 1 and 2 and are mutually acceptable to one another. (In theory of course!)
[ 11 August 2001: Message edited by: Noggin ]