I think they are looking at "that would other wise be provided by un-encapsulated , bonded reinforcing steel"
There was never going to be any steel providing a grid in a plastic pool. Since the grid would be effectively insulated from the water by the pool I don't see any advantage of bonding dirt under the pool.
This is as dumb as bonding PVC pipe.
I do agree this is going to seriously impact, if not eliminate, fibermesh concrete decks and pavers but I don't think it will affect the hole under a glass pool.
As is true with most things the AHJ will decide but it looks like the Florida IAEI is being reasonable.
BTW do you think they would have to put the grid under a wood deck? That is certainly more conductive than a glass pool.
