Not likely. It has always been the case in Europe that we can get single-meeting exemptions for use of frequencies that are not usually legal. WCs run in the UK have had exemptions to allow use of your US 72Mhz frequencies, and we have also had exemption to allow 29Mhz.
The problem seems confined to Belgium mostly, where for some reason the Government won't allow the use of 2.4Ghz. At the recent European Championships in Germany, we all used 2.4 Ghz without any problems.
Sometimes, there is a balance that has to be made by National Associations between getting races organised and attracting big entries, and ensuring that as a responsible body inside the National Governmental Organisations, we play our part. It might seem like something, but it will probably end up as nothing. HTH