It’s certainly illegal. But Louisiana is in the fifth circuit court of appeals, which is hilariously conservative. That’s the same court that covers Texas, and a few other southern states. Packing the fifth circuit with conservatives was a large part of the Southern Strategy. Now the appeals court is packed with hardline conservative judges. Whenever you hear about appeals courts being blatantly biased for conservatives, it’s almost always the fifth circuit.

So yeah, it’s illegal. But even if Louisiana courts strike it down, the fifth circuit appeals judge will likely reinstate it as soon as it crosses their desk.