untested territory at any airline. But, I would bet over 60 FEs will sue, arguing that they were forced to the panel by a now outdated law.
Yes, it is untested. However, I will bet they will have to wait until the next bid for Capt's to get the "upgrade". Meanwhile I'm sure folks will sue, it's the American way. "It's not my fault, you owe, and I'll sue for anything".