Your final JAR FCL quote again refers to a licence, not a rating contained in the licence.
It refers to exercising the privileges of a licence and that requires an in-date licence, an aircraft rating and a valid medical certificate. I agree that there is a lot of confusion out there, but I also believe the requirement to get a licence or rating reissued is quite clear, and has not changed for many years. There is no real reason, or any JAA requirement, for a candidate to hold a valid medical certificate in order to undergo a skill test for a rating hence no justification for a box however; it is only fair to make the candidate aware that they will not get the rating re-issued without the medical certificate.
The CAA should expedite EASA and it's PLD implementation asap
Rather difficult as its not yet law and even the CAA don't know what the final wording will be. When it is unleashed, its going to make matters many times worse than it now is and will not simplify anything!