Lord Howe is a fascinating place. I sailed there in company of three other people in late 2013 and due to waiting for favourable weather conditions to continue on to Nelson, NZ I spent a bit of time chatting with the locals.
The rule is that no-one can live on the island unless they were born there, have been there for a number of years due to employment, or they marry a local. On this last point I replied that this was a high price to pay, which got a few laughs.
I have a photo of a number of the Lord Howe kids standing on the pier if you'd like to add it to the gallery. Also, if you want a contact there to gather data I can give you one. There are almost as many churches as there are families on the island.