There is nothing standard in GTFO except it should be accessible from protected Linden land be it water or road(even air should have access available along public roads to avoid ban lines etc. Requests are submitted on a web site and then someone will come and assess what your parcel can accommodate. You then become an entry only in a database quoting region your on, location, name you wish to be called, and maximum vehicle sizes allowed there. So you can never accept planes unless you have a runway long enough for at least a small aircraft, but can accept helicopters if un-obstructed access is available. this could never happen in Bellisseria due to over hanging trees and the size of the parcels. The same with water, a Bellisseria houseboat could be set as a HUB but would only at maximum have a small classification, so you will never get any boat larger then a small craft around. Due to the nature of roads in Bellisseria you could never get a semi on the roads so would normally be a small van at most. As Fritigern Gothly mentioned above, if Hubs were added in Bellisseria they would more then likely be a small sign in the yard somewhere and 99% of people would not even notice it