I believe the agency in question is ACUC.
I find the original notice to be irritating and discouraging, especially because of the almost complete ignorance revealed by it, and the fact that someone in a position of power is setting policy in an information vacuum. But I think the most constructive response to something like this is to reach out, if possible, and offer information in a friendly and non-confrontational way. I hope there is someone within reasonable reach of this gentleman, who has good people skills, and can contact him with an offer to go diving and demonstrate some of the procedures with the long hose. I know that I can donate gas to an out of air diver far faster with a long hose than with a traditional octo, and maybe if this gentleman were to see that, he would at least relax his position a bit. Excluding people from club functions because they are using perfectly serviceable kit seems like a fairly violent point of view, to me.