In New Zealand, legal grants of Arms are made by the heraldic officers of Her Majesty The Queen. These are Garter Principal King of Arms, based in London, and the Lord Lyon King of Arms, of Scotland. Grants from the Chief Herald of Canada, while grants from the Crown, are not made to non-Canadian citizens.
New Zealanders may generally also obtain grants of arms from the Chief Herald of Ireland, or the Chief Herald of South Africa, and other Commonwealth heraldic authorities. But as these are not Crown grants they are in no way comparable to the legal status of grants from London, Edinburgh or Ottawa.

I have been searching everywhere that I know, but still cannot find it: Who’s arms are those to the left of the British arms on the Letters Patent as shown above?
Hi Gerard,
The arms you are referring to are those of the Duke of Norfolk, the Earl Marshal.
A larger version of the arms can be found here: http://en.wikipedia.org/wiki/File:Arms_of_the_Duke_of_Norfolk,_the_Earl_Marshal.svg
Thank you so very much!
To be even more precise, those were the arms of the 16th Duke of Norfolk. The current Earl Marshal, the 18th Duke of Norfolk, is not a Knight of the Order of the Garter (KG). Therefore, Letters Patent granting arms since 2002 have His Grace’s arms without the encircling Garter depicted in the grant above.