@mattblaze Also, AFAIK* “National Defense Airspace” isn’t actually a thing that exists in law or regulation.

TFRs do, of course, but that particular designation, along with the specific rules, appears to be made up for this purpose.

It’s perhaps a nitpick—a TFR can basically impose whatever restrictions deemed necessary. But that phrase doesn’t mean anything legally.

It’s extra weird, is what I’m saying.

*as an instructor certificate holder; also worked a bit on airspace data models for FAA