The subject line of the email says it all: VICTORY.
Several years ago, the two main rocketry organizations in the US sued the BATFE (Bureau of Tobacco, Firearms and Explosives) over their decision to classify APCP-based rocket motors as explosives.
From the email:
The BATFE regulation of APCP was found by Judge Walton to be ".. arbitrary and capricious, an abuse of discretion, or otherwise not in accordance with the law." and has been ordered by the Court to be "vacated" or canceled.
I'm doing the happy dance. Now we'll see what kind of underhanded bullshit the BATFE will try now that they've been properly slapped down.