Doesnt make any sense to me, at least on paper (screen).
A windsurfer is doing much higher speeds then a SUP and using that much more physical space in the same amount of time they're out there. Windsurfers are doing big jumps onto the other sides of waves blind and I can not see how you can transfer those attributes to a SUP.
Does not compute.
A bunch of long-time Maui SUP surfers got together and recommended that SUP surfers use the same rule at Ho’okipa
ie; me and 9 of my mates got together