Well, it's all here.

HCA said let's allow IWCA sails. HCC said OK, but not on the chartered boats. OA said, OK this is too much to manage, so no IWCA sails at all.

So, at the time HCC said no IWCA sails on the charter boats, IWCA would have been allowed on BYOB boats.

Not sure how it matters, am I still missing something?

Mike