I think maybe we have a situation where they are de facto illegal, rather than de jure illegal.
Since any hat without the 2 color ASA official logo on it is illegal, and since you can't buy a 2 stitch hat with the official ASA logo on it, you therefore can't legally use a 2 stitch hat -- unless, of course, you already have a 2 stitch with the ASA logo.
Hey, this ain't a big deal for me. I think that earlier in the thread I pointed out what you just said - nowhere in the rules describing the official ASA umpire uniform does it even mention the number of stitches in the hat.
Well, we have officially driven this subject not just into the ground, but almost through the center of the Earth to China.