think about this.... should a race track or organiser get taken to court on a noise issue they can stand up and say the they complied with MSNZ regulation (insert number) and the FIA regulation (insert another number) but this will not help as that the case will be heard on local laws as they stand. This is the reason that I say forget MSNZ. the regs that they have are nor worth a pinch of (insert or extract you know what) by all means do your home work and monitor noise in the direction of any potential complaints. note weather conditions (photos) and any other relivant things and keep them all together in a big file. forewarned is forearmed