Maybe John Roberts is available to adjudicate

The French have a word for it;

Olivier Cadic, a UK based centre-Right member of the Council for the French Abroad, said he found the charges “scandalous”.

“The Socialists made it clear during their electoral campaign that they would not impose any specific tax for non-residents bar in Switerland and Luxembourg. This is proof that they lied to the tune of 250 million euros per year,” he said.

“Not only they didn’t announce it but they make rental income charges retroactive. This underlines a terrible problem in France: one is never sure of anything when it comes to tax, there is total uncertainty as they change things all the time.”

We can appreciate it.