Reading that rule, I think they are in deep crap in court. They specifically use the phrase:
"as the result of a self-acting or self-regulating mechanism that allows the firing of multiple rounds through a single pull of the trigger."
Seems like it would be pretty simple to put an AR w/ Slide Fire in a rest in the court room, pull the trigger and slide it into the stock, then let go......and wait for it to self act or self regulate. They don't. If I didn't think the ATF was evil, I'd think they had written that rule so that it would be found illegal.
Also, FWIW, who ever wrote it seems to not have heard of binary triggers.