Natural and Administrative Justice: The Foundations of Fairness

The two doctrines, and why the distinction matters

The shift from the Employment Contracts Act 1991 to the Employment Relations Act 2000 was a shift in conception, not merely in detail. The Employment Contracts Act 1991 treated work as a contract to be enforced like any other. The Employment Relations Act 2000 treats it as a continuing relationship of mutual obligation, and it makes fairness — in substance and in process — the measure against which conduct in that relationship is judged. That fairness is delivered through two related but analytically distinct doctrines.

Natural justice governs the fairness of decisions made within the relationship, principally by the employer when exercising a managerial power that bears on an employee. It is concerned with how the decision was reached: was the employee told the case against them, given the relevant information, given a genuine opportunity to answer, and judged by someone with an open mind?

Administrative justice governs the lawfulness and fairness of the institutions and statutory powers engaged when a dispute is resolved — the Employment Relations Authority, the Employment Court, and any decision-maker exercising a statutory power under the Employment Relations Act 2000. It is the body of public-law standards (legality, reasonableness, procedural propriety) and the statutory machinery (challenge, restriction on review, judicial review) through which fairness is enforced against bodies clothed with state power.

The distinction is not academic. A natural-justice defect is a flaw in how a party to the relationship acted, and its remedy is a personal grievance measured against the statutory test of justification. An administrative-justice defect is a flaw in how a statutory decision-maker acted, and its remedy is the bespoke challenge route or, in a confined class of case, judicial review. Conflating the two produces the recurring and serious error addressed below: the assumption that judicial review is the means by which the Authority's work is ordinarily corrected. In this jurisdiction, by deliberate statutory design, it is not.

The two doctrines compared

The two doctrines are most easily held apart when set side by side. Natural justice is the narrower, procedural idea; administrative justice is the wider framework of which it forms part. The table below sets out how they differ across the dimensions that matter in practice — what each is concerned with, who it binds, the principles it supplies, its statutory basis, and the remedy for a breach.

One point in the table needs emphasis, because it is the place commentary most often goes wrong. The remedy for dissatisfaction with an Authority determination is not, in the ordinary case, judicial review. It is the statutory challenge under section 179 of the Employment Relations Act 2000, and section 184 of the Employment Relations Act 2000 expressly restricts review of the Authority to cases of lack of jurisdiction. Judicial review under section 194 of the Employment Relations Act 2000 does its real work against other statutory decision-makers. The architecture is explained in full below.

The constitutional and statutory foundations

The constitutional anchor is section 27 of the New Zealand Bill of Rights Act 1990. Section 27(1) affirms the right of every person to the observance of the principles of natural justice by any tribunal or other public authority that has power to make a determination in respect of that person's rights, obligations, or interests protected or recognised by law. Section 27(2) confers the correlative right to apply for judicial review of such a determination. Section 27 is the hinge between the two doctrines: 27(1) states the natural-justice standard, and 27(2) names judicial review as the public-law mechanism for vindicating it. Any treatment of administrative justice that does not begin here has omitted its foundation.

Within the employment relationship, natural justice is given statutory form in two provisions. The first is the duty of good faith in section 4 of the Employment Relations Act 2000. That duty requires the parties to be active and constructive in maintaining a productive employment relationship in which they are, among other things, responsive and communicative. Critically for the fairness of process, section 4(1A)(c) of the Employment Relations Act 2000 requires an employer proposing a decision that will, or is likely to, have an adverse effect on the continuation of employment to provide affected employees with access to information relevant to the continuation of their employment, and an opportunity to comment on that information, before the decision is made. Disclosure, in this jurisdiction, is therefore not only a natural-justice expectation; it is a statutory duty.

The second is the test of justification in section 103A of the Employment Relations Act 2000, which translates the principles of natural justice into a set of statutory questions against which any dismissal or disadvantage is measured. It is examined below, in the discussion of the test of justification.

The institutions are bound directly. Section 157 of the Employment Relations Act 2000 defines the role of the Authority and, in section 157(2), expressly obliges it to comply with the principles of natural justice, to promote good faith behaviour, to support successful employment relationships, and to further the object of the Act. The same provision, in section 157(3), directs the Authority to act in equity and good conscience, subject only to the Act, the regulations, and the relevant employment agreement. The Employment Court carries the parallel equity-and-good-conscience direction in section 189 of the Employment Relations Act 2000. These directions are the statutory source of each institution's own obligation to act fairly.

Natural justice within the employment relationship

Natural justice is not a fixed code. Its content is contextual and rises with what is at stake: the graver the allegation and the more serious the consequence for the employee, the more exacting the process the law demands. The doctrine rests on two limbs — the right to be heard (audi alteram partem) and the rule against bias (nemo iudex in causa sua).

The hearing rule

The hearing rule requires that, before an employer makes a decision adverse to an employee, the employee be given a genuine — not a nominal — opportunity to be heard. In the New Zealand setting that opportunity has four discernible components.

Notice. The employee must be given clear and specific notice of the concern or allegation. A general, shifting, or undisclosed accusation cannot fairly be answered.

Disclosure. The employee must be given the information on which the employer intends to rely. The obligation has both a good-faith source (section 4(1A)(c) of the Employment Relations Act 2000) and a natural-justice source. The leading authority on its scope in a restructuring context is Vice-Chancellor of Massey University v Wrigley [2010] NZEmpC 52, in which the Employment Court addressed how far an employer must disclose the information and reasoning underlying a proposal so that affected employees can respond to the real basis of the decision rather than to a sanitised summary of it. The principle generalises: an opportunity to comment is hollow if the material grounding the decision is withheld.

A genuine opportunity to respond, and genuine consultation. Where the decision affects continued employment, the opportunity to respond takes the form of consultation, and consultation has a settled content. As the Employment Court held in Simpsons Farms Limited v Aberhart [2006] NZEmpC 92, consultation must occur before the decision is made, must be undertaken with an open mind and a genuine willingness to be influenced, and must give those consulted a real chance to express views and have them considered. A consultation conducted after the decision has in substance been taken is not consultation; it is the performance of one. This is the point at which the hearing rule and the rule against bias converge, because a predetermined outcome is both a denial of the hearing and a manifestation of a closed mind.

Genuine consideration. The decision-maker must weigh the employee's response with an open mind before deciding. This is codified directly in the statutory test of justification, discussed below.

The rule against bias

The rule against bias requires that the decision be made by a person who is, and appears to be, impartial. New Zealand law is principally concerned with apparent bias, because public and individual confidence in a process depends on appearances as much as on actual states of mind. The governing test was settled by the Supreme Court in Saxmere Co Ltd v Wool Board Disestablishment Co Ltd [2009] NZSC 72, and applied, on fuller facts, in the Court's recall judgment in Saxmere Co Ltd v Wool Board Disestablishment Co Ltd [2009] NZSC 122: whether a fair-minded lay observer, informed of the relevant facts, would reasonably apprehend that the decision-maker might not bring an impartial mind to the resolution of the question.

In the workplace the rule has practical force where the same person complains, investigates, and decides; where the decision-maker has a personal or pecuniary interest; or where a concluded view has been formed before the employee is heard. Predetermination — the closed mind identified in Simpsons Farms Limited v Aberhart — is the species of disqualifying partiality most often encountered in disciplinary and restructuring processes. The most reliable protection against an apparent-bias challenge is the separation of the investigative and decision-making functions, even where that separation is not strictly mandatory.

Codification in section 103A, and the objective standard

Section 103A of the Employment Relations Act 2000 codifies the hearing rule. It asks, on an objective basis, whether the employer's actions and the manner of acting were what a fair and reasonable employer could have done in all the circumstances at the time the dismissal or action occurred. In applying that test the Authority or the Court must consider whether the employer sufficiently investigated the allegations (having regard to the resources available to the employer), raised its concerns with the employee, gave the employee a reasonable opportunity to respond, and genuinely considered the employee's explanation. Those statutory factors are the hearing rule in legislative language.

The word "could" is doing deliberate work. Section 103A of the Employment Relations Act 2000 was substituted on the 1st of April 2011 by the Employment Relations Amendment Act 2010, which replaced the earlier formulation asking what a fair and reasonable employer "would" have done with the present formulation asking what such an employer "could" have done. The change widened the band of responses the law will treat as justifiable: the question is no longer whether the employer reached the particular decision a fair and reasonable employer would have reached, but whether the decision fell within the range of responses open to a fair and reasonable employer. The standard remains objective, but it is a standard of range rather than of single correct outcome.

The position is no longer static. The Employment Relations Amendment Act 2026 (2026 No 4), which received the Royal assent on the 20th of February 2026 and took effect on the 21st of February 2026, amended section 103A of the Employment Relations Act 2000. It inserted a further consideration as section 103A(3)(e) and replaced the procedural-defects provision in section 103A(5). The earlier section 103A(5) directed that a dismissal or action was not to be held unjustifiable solely because of process defects where those defects were minor and did not result in the employee being treated unfairly. The replacement provision must be read directly from the current text of section 103A of the Employment Relations Act 2000 before it is relied upon, because the recalibration of that subsection is the precise mechanism by which the Employment Relations Amendment Act 2026 reduces the weight the law gives to procedural failure. Any analysis quoting the pre-21 February 2026 wording of section 103A(5) is now out of date.

The integration of procedural and substantive fairness

An older view treated substantive fairness (was there a good reason?) and procedural fairness (was a fair process followed?) as separate compartments. New Zealand law abandoned that view. A dismissal that is substantively well-founded may still be unjustifiable where the process by which it was reached neglected the minimum standards of fair and reasonable treatment. The point was put squarely by the Employment Court in Pain v The Alliance Group Ltd [1996] NZEmpC 332: a substantively justified dismissal will be vitiated where, in the process, the minimum standards of fair dealing are ignored or neglected.

The same integration is visible in the restructuring context. In Baguley v Coutts Cars Limited [2001] NZEmpC 47 — a decision later considered on appeal — the Employment Court confirmed that a genuine commercial reason for a restructuring does not relieve the employer of the obligation to act fairly in carrying it out. A genuine reason executed unfairly remains an unjustified action. Procedure, on this view, is not a formality external to the merits; it is part of the merits. That proposition, read together with the consultation standard in Simpsons Farms Limited v Aberhart and the disclosure obligation in Vice-Chancellor of Massey University v Wrigley, is the doctrinal core of fair process in the New Zealand employment relationship.

Administrative justice at the institutional level

Administrative justice concerns the lawfulness and fairness of bodies exercising statutory power. In this jurisdiction it operates on two planes: the conduct of the Authority and the Court in their own processes, and the public-law standards applied to employers and others exercising statutory powers under the Employment Relations Act 2000.

The investigative model and its effect on natural justice

The Authority is, by section 157(1) of the Employment Relations Act 2000, an investigative body whose role is to resolve employment relationship problems by establishing the facts and making a determination according to the substantial merits of the case, without regard to technicalities. This inquisitorial design is not a footnote; it shapes the content of natural justice before the Authority. Because the Authority drives the inquiry, the procedural protections look different from those of an adversarial court. The hearing rule is satisfied by ensuring that each party knows the case it must meet and has a genuine opportunity to be heard on it — through the investigation meeting, not a hearing in the curial sense — rather than through the full apparatus of pleadings, discovery, and cross-examination. The natural-justice obligation in section 157(2) is therefore calibrated to an investigative, merits-based process, which is precisely why a determination is not lightly impugned for the procedural features that distinguish it from a trial.

The equity and good conscience direction

Both institutions are directed to act in equity and good conscience — the Authority under section 157(3) of the Employment Relations Act 2000, the Court under section 189 of the Employment Relations Act 2000. The direction permits each body to look past technical impediments to the substance of the dispute, and to receive and weigh material that strict rules of evidence might exclude, always subject to the Act, the regulations, and the relevant employment agreement. It is the statutory expression of the proposition that the jurisdiction exists to do justice between the parties to a relationship, not merely to adjudicate a contract.

The architecture of review — correcting the common error

The most frequent error in commentary on administrative justice in this field is the assertion that judicial review is the primary mechanism by which the Authority's work is corrected. It is not. The Employment Relations Act 2000 deliberately channels dissatisfaction with the Authority away from judicial review and into a bespoke statutory route.

The primary route is a challenge under section 179 of the Employment Relations Act 2000. A party dissatisfied with a determination of the Authority may elect, within 28 days, to have the matter heard by the Employment Court. The election may be for a full rehearing on the merits — a hearing de novo — or, alternatively, may be confined to specified errors of law or fact. The de novo pathway is the characteristic feature of the challenge route: it allows the Court to hear the matter afresh rather than to supervise the Authority's reasoning. In most cases this renders judicial review unnecessary, because a complaint that the Authority proceeded unfairly is cured by a fresh hearing rather than by quashing a determination.

That channelling is reinforced by a privative clause. Section 184 of the Employment Relations Act 2000 provides that, except on the ground of lack of jurisdiction or as provided in section 179, no determination, order, or proceeding of the Authority is removable to any court by certiorari or otherwise, or liable to be challenged, reviewed, quashed, or called in question in any court. Section 184 further restricts the commencement of review proceedings under section 194 until the statutory challenge route has been exhausted. The practical effect is that judicial review of an Authority determination is confined, in substance, to genuine jurisdictional error; ordinary error is addressed through the challenge.

Judicial review proper is provided for in section 194 of the Employment Relations Act 2000, which vests the Employment Court with jurisdiction to review the exercise of statutory powers under the Act. Its principal field of operation is not the Authority's determinations but the exercise of statutory powers by others — a public-sector employer, the Registrar, or another body exercising a statutory power of decision in the employment field — where no challenge route exists. The grounds are the orthodox public-law grounds: illegality (acting outside the power conferred), unreasonableness (a decision no reasonable decision-maker could reach), and procedural impropriety (breach of natural justice, including bias). It is through the third ground that the two doctrines meet: a breach of natural justice by a body exercising statutory power is, in administrative-law terms, procedural impropriety, and so a ground of review.

The architecture therefore runs: challenge under section 179 of the Employment Relations Act 2000 as the primary corrective for the Authority; the privative clause in section 184 of the Employment Relations Act 2000 confining review of the Authority to jurisdictional error; and judicial review under section 194 of the Employment Relations Act 2000 — resting on the right in section 27(2) of the New Zealand Bill of Rights Act 1990 — operating chiefly against other statutory decision-makers. Any account that places judicial review at the centre of the Authority's accountability has the structure inverted.

The interface between the two doctrines

The doctrines meet at a single conceptual point. Natural justice supplies the standard of fair process. Administrative justice supplies the forum and remedy when that standard is breached by a body wielding statutory power. Where the breach is by an employer in the private exercise of a managerial power, the remedy is a personal grievance determined against the test in section 103A of the Employment Relations Act 2000. Where the breach is by an employer or other body in the exercise of a statutory power, the same natural-justice standard is enforced as procedural impropriety on judicial review under section 194 of the Employment Relations Act 2000. The standard does not change; only the route by which it is vindicated changes with the legal character of the decision-maker.

This is why section 27 of the New Zealand Bill of Rights Act 1990 is the proper starting point rather than an afterthought. Section 27(1) states the standard owed by tribunals and public authorities; section 27(2) names judicial review as its remedy. The Employment Relations Act 2000 then overlays a more specific and, for the Authority, largely exclusive machinery on top of that constitutional baseline.

Contemporary pressure points

The fairness architecture described above is under deliberate legislative pressure. The Employment Relations Amendment Act 2026 does not abolish natural justice, but it adjusts the weight the law gives to procedural failure and narrows the class of employees who may invoke the personal grievance jurisdiction at all. The two levers operate at different points in the structure, and they should be analysed separately because they do different work.

The procedural lever is the recalibration of section 103A(5) of the Employment Relations Act 2000. By altering the circumstances in which process defects will not render a dismissal unjustifiable, the amendment shifts the balance struck in Pain v The Alliance Group Ltd and Baguley v Coutts Cars Limited — under which procedure was treated as integral to the merits — towards a model in which a sound substantive reason may more readily survive a flawed process. Combined with the substitution made by the Employment Relations Amendment Act 2010 — in force on the 1st of April 2011, which replaced "would" with "could" in section 103A(2) — the trend across fifteen years is unmistakable: the law has progressively widened the employer's margin and narrowed the circumstances in which a procedural failure is fatal. The integration of procedure and substance that Pain and Coutts Cars established is not repealed, but the weight it carries is being reduced by statute.

The jurisdictional lever is the new high-income threshold, now found at section 113A of the Employment Relations Act 2000, under which an employee whose annual remuneration meets or exceeds a specified threshold — set at NZ$200,000 — may not pursue a personal grievance for unjustified dismissal or unjustified disadvantage. This is a different kind of change. The procedural lever lowers the standard for everyone; the jurisdictional lever removes the route entirely for a defined class. For employees above the threshold, the natural-justice standard codified in section 103A of the Employment Relations Act 2000 ceases to be enforceable through the personal grievance route at all, and protection must be sought, if anywhere, in the express terms of the employment agreement or in residual contractual and public-law avenues. That is a structural withdrawal of the fairness guarantee, not an adjustment within it.

The coverage lever operates earlier still. The contractor-status changes tighten who counts as an employee in the first place. Their significance for the present subject is that natural justice and the test in section 103A of the Employment Relations Act 2000 only ever protect those inside the definition of employee in section 6 of the Employment Relations Act 2000; a gateway that excludes more workers from that definition correspondingly shrinks the population to whom the fairness doctrines apply at all.

The throughline is that fairness in this jurisdiction has always depended on two things operating together: a substantive standard of fair treatment, and an accessible institutional route to enforce it. The reforms made by the Employment Relations Amendment Act 2026 press on both — softening the standard through section 103A(5) of the Employment Relations Act 2000, and removing the route for defined classes through section 113A of that Act and the contractor gateway. An assessment of natural justice and administrative justice that stops at the doctrine, without registering the contraction of access, describes the architecture while ignoring the load now being placed on it. The doctrinal questions and the distributional questions are, in this area, the same question viewed from two angles.

Conclusion

Natural justice and administrative justice are the two halves of fairness in the New Zealand employment jurisdiction. Natural justice governs the conduct of the parties — principally the employer — through the hearing rule and the rule against bias, anchored in the good-faith duty in section 4 of the Employment Relations Act 2000 and codified in the test of justification in section 103A of the Employment Relations Act 2000, and elaborated in Pain v The Alliance Group Ltd, Baguley v Coutts Cars Limited, Simpsons Farms Limited v Aberhart, and Vice-Chancellor of Massey University v Wrigley. Administrative justice governs the institutions and the exercise of statutory power, anchored in the natural-justice and equity-and-good-conscience directions in section 157 of the Employment Relations Act 2000, the challenge route in section 179 of the Employment Relations Act 2000, the privative clause in section 184 of the Employment Relations Act 2000, and the judicial review jurisdiction in section 194 of the Employment Relations Act 2000, all sitting beneath the constitutional guarantee in section 27 of the New Zealand Bill of Rights Act 1990.

The two doctrines share a single standard of fairness and differ only in forum and remedy. Understanding that relationship — and resisting the common error that judicial review is the ordinary corrective for the Authority — is what separates a competent account of this area from an authoritative one. The reforms made by the Employment Relations Amendment Act 2026 make that understanding more, not less, important: as the procedural floor is lowered and access is withdrawn from defined classes, the precise content of the fairness that remains, and the precise routes by which it can still be enforced, become the questions on which real cases will now turn.

Legislation cited is linked to the current consolidated text on the New Zealand Parliamentary Counsel Office website at legislation.govt.nz. Case authorities are linked to the Working for Workers case law and reference repository at caselawandreference.workingforworkers.nz, except Saxmere Co Ltd v Wool Board Disestablishment Co Ltd [2009] NZSC 122, which is linked to the judgment published by the Courts of New Zealand. The text of section 103A(5) of the Employment Relations Act 2000, as replaced by the Employment Relations Amendment Act 2026, should be confirmed against the current consolidation before being relied upon in any filed document.