I'd be surprised if the courts don't allow the regulations to remain in effect until a new appointee can be confirmed.
Me too. After all, the Ill. gun law was ruled unconstitutional, but the court is letting it (a law that has been ruled to unconstitutional, mind you) remain in effect until they can come up with some watered down version that barely squeaks under the requirement for constitutionality.
I don't trust the SCOTUS to actually strike anything down in the sense of, you know, actually striking something down. I think they have forgot that they can do that.