1.4.4 The three ‘rules’ of natural justice

Three common law rules are generally referred to in relation to natural justice or procedural fairness. 

The Hearing Rule 

This rule requires that people must be allowed an opportunity to present their case where their interests and rights may be affected by a decision maker. 

To ensure that these rights are respected, the decision maker must give people the opportunity to prepare and present evidence, and to respond to arguments presented by the opposing side. 

When conducting an investigation in relation to a complaint, the person being complained against must be advised of the allegations in as much detail as possible and must be given the opportunity to reply to the allegations. 

The Bias Rule

This second rule states that no one should judge his or her own case. This requires the decision maker to be unbiased when holding a hearing or making the decision. 

Additionally, investigators and decision makers must act without bias in all procedures connected with the making of a decision. 

A decision maker must be impartial and must make a decision based on a balanced and considered assessment of the information and evidence before them without favouring one party over another. 

Even where no actual bias exists, investigators and decision makers should be careful to avoid the appearance of bias. Investigators should ensure that there is no conflict of interest which would make it inappropriate for them to conduct the investigation. 

The Evidence Rule 

The third rule is that an administrative decision must be based on logical proof or evidence. 

Investigators and decision makers should not base their decisions on speculation or suspicion, or on assurances of what might be done at a future date. Rather, an investigator or decision maker should be able to clearly point to the evidence on which the inference or determination is based. 

Evidence (arguments, allegations, documents, photos, etc) presented by one party must be disclosed to the other party, who may then subject it to scrutiny.

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The information contained in this online guide is intended as a general guide.
While reasonable measures have been taken to ensure that the information is current and accurate as at October 2019, the Health Promotion Agency cannot accept any liability for any inaccuracy, omission or deficiency in relation to the information. It is not legal advice and you should not rely on anything contained in this guide in any legal proceedings. The information provided does not replace or alter the laws of New Zealand, and you should consult the legislation and obtain your own legal and professional advice, as appropriate. The Health Promotion Agency will not accept liability for any action taken in reliance on anything contained in this online guide.