> Once a rule is thus repealed, the Congressional Review Act (CRA) also prohibits the reissuing of the rule in substantially the same form or the issuing of a new rule that is substantially the same, "unless the reissued or new rule is specifically authorized by a law enacted after the date of the joint resolution disapproving the original rule" (5 U.S. Code § 801(b)(2))

The CRA allows the rules to be recreated if given explicit authorization from a law by congress. So they can be put back in place, just not as easily.