Well in the past, I've always got a ticket through the AMS if I'm taking a model along.
I think you can exhibit your model as an individual, but the organisers now seem to be stipulating new conditions which require you to bring your model for the entire length of the show i.e. all three days.
This is what happened at the recent International Model boat Show, which is organised by the same outfit, and took place last month.
An email to Meridienne would soon clarify this.
In my opinion, it's not a good policy, as a lot of folk will be put off exhibiting, especially if they live a fair distance away.
However, I don't know if these rules will apply to the show in January, hence why I suggest contacting the organisers.