thanks tobes, found this one from the CASA doco that seems to be the crunchy bit. The way i read it is if you can get an area approved for operation of unmanned aircraft (under 101.030 Paragraph (2)(a)) then your all golden for kiting.
The closest thing i could find to exclusion zones was where it talks about needing permission to operate above 400ft and within 3nautical miles of the airport.
We got pulled up the otherday (after the culprit had already left) by the Feds - we were told hobart airport has an exclusion zone extending 45degrees each side out from the end of the runway for 20km above dune level - yes that right 20km (maybe a wide safety margin boxburg?). Am thinking thats not quite right... we have done a google earth picture to show how many kite spots that would put out of action (we have all the wind angles covered!)
I think tho as long as they can't see the kites from the runway or terminal (you can see the dunes and radar at the end) as the safety car does its inspection then we're all good... still looking to see if anyone else knows anything 'official' about it all!
*edit: forgot to add the airport runs up-down on this map, kites go the big long beach on seabreezes @ one of the two spots marked - we don't cross flight path at all.