The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
http://www.webcitation.org/query?url=http%3A%2F%2Fwww.legislation.govt.nz%2Fact%2Fpublic%2F1990%2F0108%2Flatest%2FDLM223191.html+&date=2015-04-02