Here it is from the horses mouth.
The JAA
http://www.jaa.nl/jar/jar/jar/jar.fcl.3.1.a.3.125.htm
It looks like The Irish Aviation Authority Aligned itself with the JAA in 1998 on this issue.
The sustance of both regs is the same, therefore I believe that they are equivalent.
The JAA mentions "medical flight test"
It also says that they will be looking for proof of an equivalent level of safety.
Such proof is readily available for the signal light gun test. The FAA have been doing this for years (maybee as many as 50) and to date not one single accident has been attributed to a pilot with a SODA mixing up colours.
It looks like it is up to someone to request this review. Alas I live in the US and have no immediate plans to move home but come on lads it looks like the door is really open here.