Originally Posted by Say Watt
That is an absolutely ludicrous rule then. Rep to you though for clarifying.
A QB could then just start running, get past the LOS, still act like he is going to pass, and suddenly the defense can't tackle him like they would anyone else. This could be a huge advantage, if they were to ever utilize it, for guys like Vick, Newton, and others that can start running, freeze a defense with a fake pass forcing the defender to go low, and then juke out of the way and off he goes. This is all part of the game when the QB is behind the LOS, but it is asinine to allow it past the LOS.
Just don't tackle him high or low.
And don't rep me, rep Champion Texan. He's the one who did the research and posted the actual text from the rulebook.