S. 164 is a bill that seeks to amend chapter 8 of title 5 of the United States Code. The goal of the bill is to allow for en bloc, or grouped, consideration in resolutions of disapproval for "midnight rules," which are regulations introduced at the end of a President's term....
Simple Explanation
S. 164 is a bill that wants to change rules so that Congress can reject a bunch of last-minute rules made by a President who's leaving, all at once, instead of one at a time.