The regulatory authority in New Zealand is Medsafe which is governed by the Ministry of Health. Prior to conducting a clinical trial involving a non-licenced product, or a licenced product for a new indication or using different dosing regimes, an application must be submitted to Medsafe. An application must also be made to SCOTT (Standing Committee on Therapeutic Trials). These applications can run at the same time as that to the HDEC.
Applications to Medsafe / SCOTT are the responsibility of the sponsor but may be delegated to a New Zealand based representative. The current fee schedule can be found here.