According to the actual mooring application that must be filed, permits for moorings used for PWC, sunfish, jet skis, canoes, rowboats, etc will not be issued. (unless under special circumstances as stated)
When I applied for our moorings they would not allow us to use our PWC as registered vessels towards determining our need for the 2 moorings we have. I am not sure how associations such as South Down can get away with it.
Here is the link to the application we had to file:
http://www.nh.gov/safety/divisions/s...ngs/forms.html