It's taken a long time but there is a now a document detailing the processes for installs in apartment buildings which takes effect from 30th May 2013. Basically installs will be free for buildings under 3 stories, and a $1000 subsidy per install for buildings higher than 3 stories.
http://www.med.govt.nz/sectors-industries/technology-communication/communications/broadband-policy/telecommunications-infrastructure-deployment