Stuff.co.nz carries an article featuring George Boorer ZL3PN, and discusses the return of access to 6 Metres (~54Mhz) with the shutdown of the conflicting Analogue TV network.
6 Metres - referred to as the 'Magic Band' by some - has had very limited use in New Zealand for many years, due to the close proximity of the Analogue VHF TV transmission.
Radio New Zealand also interviewed George (Link provides recordings in various formats). During the interview, it is noted that there are still power restrictions, which will remain until the analogue TV shutdown is completed in the North Island, to occur on a staged basis over the remainder of 2013. This TVNZ News Article has some more information.