Used to be for sure, my understanding is that it's been relaxed. Will check with base for sure.
Where around Sandbox do people like to set the hook? It's always seemed to me that going east along the south shore of Prickly Pear, the water deepens very quickly making it a bit hard to find the right anchoring depth; around the corner from Sandbox heading up the west-facing coast, in PP's lee, on paper looks to make a lot more sense, all the way up to near Catcus Reef at the north end... I just don't recall seeing boats do that.