probably because practically and competitively it probably takes far too much time and effort to set up to be of any advantage, plus it must be hell on the helmsmans shoulders. So no rule change needed because no one is likely to start doing it in races.Personally, I think that technique is *******s. Why ban weight jackets if you're going to allow that? ISAF...rule change please!
See the toe loops on the back of the wings? I might see if I can stitch a pair on the shoulders of my crew's trapeze harness and see if he notices...
So which 18 team is going to try the triple then...??