While they put on the owner of Atlantis Aquatics (the anointed "partner" to run the dive operations) as a (fairly lengthy) presentation witness to support the zoning variance application, questions about the operations were shut down almost immediately. The zoning board wasn't interested. Public Safety Diving and local fire departments will have access so there is "public good" reason to grant applications. In fairness to the board, the meetings typically end by 10pm and they didn't even get to the Dutch issue until after that and exact details of use are the purview of Planning, not Zoning. The board is probably the most applicant-friendly that I have heard of and the TC lawyer was VERY efficient.
That said, there was no info on total person capacity given and there must be an insured "pro" who is responsible for the divers - no greater specificity given. Atlantis did mention a rent-a-DM possibility and there were hints that something like the current model (surface supervision by lake guards) may be possible sometime.