Thanks for that reply Trumpy. It confirms that the way CT chambers are constructed in the industry right now is compliant. No drastic (expensive) changes are required.

I see the EWRB has issued an email today announcing that they have struck a deal with Standards New Zealand to make standards documents, referenced in the Regs, available online.

Guess I'll have to take back my comments on "government officials not helping Joe Sparky" now!

Shucks !