Notices of proposed rulemaking can sometimes happen very quickly, or sometimes they just put it on a shelf and it never happens. After 9/11 there were huge numbers of rule changes and they went into force almost immediately after the comment period ended.
This is sort of between the two extremes. Essentially all it does is replace the words "a" with "three" in various places throughout the CFR, so it's hardly a big deal.
So I suspect it will happen, but I doubt they'll do it in a rush.



