This is interesting. I have to "rescue tie" Zipper in the back of my Jeep, because otherwise, he would be in my lap. We have a short strap that hooks to the car and to his collar. He can lie down, but he doesn't have room to jump the seat or to jump out of the car. The others ride in the back and never even attempt to leave that spot. Wouldn't I have to put them in the backseat, rather than the very back of the SUV to abide by this law? We have no such laws in SC.