Hi Mattb, thanks for your comments. 
I’ve tracked down the development proposal for the block dating back to the early 70s but there is no mention of total number of cars allowed, and certainly no mention of visitor lots (and we have several now, painted in at the behest of the body corporate, so technically these lots are unapproved by council!). The development proposal to council just shows number of carspaces with carspace dimensions. I’ll have to go back to council on this one and get more info. On the other hand, I’ve looked up city of sydney council requirements on turning
circles adjoining carspace lots, and the space I’m leaving other lot owners is double what the sydney city council specifies (and they are using an XD falcon and LTD as models – yes, its an old document!)
Again, thanks for the input!