Very interesting, I was wondering why nearly every 3/4 ton I saw down south had a sticker on it.
Up here, it's only commercial registered 1 ton and up, lots of F250's around, personal and commercial, with no yearly inspection. Mind you, that wouldn't be the first thing that's differemt... LOL
On second thought, with the higher GVWR of the 05's, it may be enough that you do need one... But, there's a buttload of 'em around here without.