No, I don't think the moderators really care about secrets, it just takes time for newbie posts to appear. Meanwhile, a bit of searching would have revealed:
18 Brookvale DOES have an existing prefix that one can use when writing AR's.
Deewhy doesn't, so "Other" prefix would be appropriate.
Finally, using the built-in or general search functions can work wonders in finding the desired info:
http://www.aus99forum.com/showthread...=1#post2805733