As stated by a Police spokesperson:
As part of our ongoing investigation into the Christchurch terror attack, we have made extensive enquiries into the process which saw the accused issued with a firearms licence.
In the interests of ensuring accuracy of information in the public domain, we can clarify the following:
Based on the information available to us at this time, we have found that correct process was followed by staff involved in the firearms licence application.
/NZ Police Public Release. View in full here.