They probably do, but given the amount of time required for such regulations to be written, commented on and those comments analyzed and dealt with, and published to the FR before being effective, he would have to have the clarifying regulations ready by the end of next week in order for them to take effect before the next presidential term begins.

And then the next Congress can simply review them and overturn those changes as part of a law that the Gingrich GOP introduced to overturn Clinton's last-minute regulatory actions (see the Congressional Review Act).

They don't and it will be clarified by the courts whenever any of their "clarifications" are up vs precedent.