On the 24th July 2014 the Prohibited Equipment Dog Tracking Device Notice 2014 was replaced with the Animal Tracking and Training Device Notice 2014 to include training devices as well as tracking.
The Notice was introduced to address the supply, importation and use of equipment operating on United States MURs frequencies (151.820MHz, 151.880MHz, 151.940MHz, 154.570MHz and 154.600MHz)
These frequencies conflict with licensed land mobile services in New Zealand and do cause interference to those services.
New Zealand Customs is actively intercepting such equipment when and where it presents at the border.
Read the updated Radiocommunications Regulations (Prohibited Equipment – Animal Tracking and Training Devices) Notice 2014 - http://www.rsm.govt.nz/cms/policy-and-planning/spectrum-policy-overview/legislation/gazette-notices/product-compliance/prohibited-equipment-notices-1/radiocommunications-regulations-prohibited-equipment-dog-tracking-and-training-devices-notice-2014