There’s a story some people tell themselves about justice systems.

That they are public.

That the law is knowable.

That if you want to understand what’s happening to you in a courtroom—whether you’re a defendant, a victim, a parent, a witness—you can. That you can read the rules, learn the language, and meet the system on roughly even ground.

That story is comforting.

It is also incomplete.

Because “the law” isn’t only the legislation and the reported cases. The law is also how it gets applied. It’s the habits, defaults, shared terminology, and standard directions that shape how a hearing runs and how a decision gets made.

And that’s where bench books live.

Bench books are not gossip. They’re not personal diaries. They are practical manuals for judges: procedural guidance, summaries, specimen directions, context, and the shared “this is how we do it” language that helps courts run consistently. They don’t usually bind judges—bench books themselves often say they’re guides, not law—but they absolutely influence how judicial decision-making is structured and communicated. In other words: they’re part of the operating system.

In New Zealand, some bench book material is publicly available. The Criminal Jury Trials Bench Book, for example, is published online, with specimen jury directions and guidance for jury trials. It even explicitly flags that it’s updated regularly and shouldn’t be printed as a “finished” document.

But there’s a gap—and it’s not small.

Historically, other bench books, particularly in areas where social context and “common knowledge” claims have enormous consequences, have not been publicly accessible in the same way. And that creates a structural problem: open justice starts to mean “you can watch what happens,” not “you can understand the language and assumptions guiding it.”

Which leads to teh question:

If justice is public, why are some of its manuals private?

The myth of transparency

We talk about transparency like it’s a switch. Either a system is open or it isn’t. Either courtrooms are public or they’re not. Either decisions are published or they aren’t.

But transparency isn’t one thing. It’s a stack.

Can you attend the hearing? Can you access the written decision? Can you understand what the decision is saying? Can you see the framework and terminology used to interpret the evidence? Can you critique the training materials that shape “standard” judicial thinking?

If the answer is yes to the first two and no to the last three, you don’t have transparency. You have theatre.

You have visibility without comprehension.

You have a public process in a private language.

Bench books are power, in paperback form

A bench book is where a system becomes legible to itself.

It standardises the moves. It builds a common vocabulary. It makes sure different judges aren’t reinventing the wheel in different courtrooms with different assumptions. That’s the point: consistency and quality.

And that’s exactly why the public should be able to see them.

Because consistency is not automatically good. Consistency is just repetition. If the underlying guidance is flawed, secrecy doesn’t protect the system — it protects the flaw.

It turns “this is how we do things” into “this is how we do things and you’re not allowed to check whether it makes sense.”

And it creates a two-tier reality:

People inside the system share language and shorthand. People outside it are expected to participate without knowing what any of it means.

In a justice context, unequal fluency becomes unequal outcomes.

Not always dramatically. Sometimes quietly. Sometimes in the form of a misunderstanding you never even realise happened.

You can’t challenge what you can’t see

If a judge references a concept you’ve never heard of, you can’t meaningfully respond.

If the court uses terminology in a way that doesn’t match how it’s used in real life, you can’t correct it.

If a bench book frames a subject with a particular set of assumptions—about credibility, about risk, about “normal” behaviour, about what counts as evidence, about what people “usually” do—you can’t contest those assumptions if you don’t know they’re being taught as baseline.

You are left arguing facts while the court is operating inside an interpretive framework you’re not allowed to examine.

This is not a conspiracy. It’s a design feature of closed information systems: the people with access to the manuals set the terms of the conversation.

And the stakes aren’t intellectual.

The stakes are people’s lives.

In criminal court, the words used to direct a jury shape what jurors think they are allowed to do with doubt, with credibility, with misconceptions, with reasoning. Bench books provide specimen directions—meaning they influence the language jurors receive as “the right way” to think about the case in front of them.

In family court contexts, where decisions can reshape entire lives—where risk, credibility, coercion, parenting capacity, and safety are interpreted—the baseline knowledge and language matters even more. This is why the secrecy of certain bench books has been criticised: if guidance includes contested claims or outdated concepts, you don’t find that out through trust. You find it out through scrutiny.

And scrutiny requires access.

“But people will misunderstand it”

This is one of the most common reasons you’ll hear for keeping internal judicial resources private. The public won’t interpret it correctly. The media will cherry-pick. People will treat it as binding law. It will be misused.

But that argument is a confession.

It says: the material is important enough to shape decisions, but the public is not competent enough to see it.

Which is an odd position for a system that relies on public legitimacy.

Other jurisdictions manage this without collapsing.

The UK publishes the Equal Treatment Bench Book—explicitly aimed at ensuring fair treatment for court users across difference and vulnerability. Australia’s NSW Judicial Commission publishes bench books and keeps them updated as public resources. These systems don’t pretend that making guidance public will cause chaos. They treat the public as adults and do the obvious thing: they provide context, disclaimers, version control, and updates.

New Zealand already uses some of these strategies in the bench books it does publish: it flags that the resource is updated continuously, includes editorial notes, and describes its role as a guide rather than binding authority.

So the “misunderstanding” argument doesn’t really land as a reason.

It lands as a preference.

A preference for a system that can be observed, but not interrogated.

Withholding information is not neutral

There’s a particular kind of institutional tone that happens when you ask for transparency and you’re given “trust.”

Trust us, the system says. Trust that the guidance is sound. Trust that the training is modern. Trust that everyone is aligned. Trust that if something was wrong, it would be fixed.

But trust is not a replacement for oversight.

And withholding information is not neutral. It creates predictable effects.

It concentrates interpretive power inside the institution.

It raises the barrier to meaningful participation.

It increases reliance on insiders—lawyers, experts, “people who know how it works”—and therefore deepens inequity, because access to insiders is money, education, and social capital.

It turns justice into something you receive, not something you can understand.

Which is a problem even when the outcome is “fine.”

Especially when the outcome is not.

Because when a decision devastates your life, you will go looking for the logic. Not just the words in the judgment—the framework behind them. The definitions. The assumptions. The baseline.

And if the framework is hidden, you’re left with the worst possible pairing:

Maximum impact, minimum clarity.

Common language is not a luxury. It’s the minimum.

We underestimate how much of justice is language.

Not poetry language. Not feelings language. Procedure language. Category language. Labels that decide what evidence means, what behaviour signifies, what risk looks like, what credibility sounds like, what “reasonable” is allowed to include.

If the system expects you to be ruled by its terminology, it should not get to keep that terminology in a locked drawer.

Common language is not an extra. It’s the minimum requirement for a fair process.

Otherwise, you end up with something that looks like due process on paper and feels like fog in the body.

You are in the room, but you are not in the conversation.

Open justice is not a viewing gallery

If New Zealand wants to claim open justice, it has to mean more than “the doors are open.”

It has to mean the intellectual infrastructure is open too.

Not because bench books are perfect.

Because they’re not.

And because perfection is not the point.

The point is accountability.

The point is that if a public system is going to decide custody, sentencing, credibility, safety, liberty—if it’s going to decide who is believed, who is protected, who is punished, who is returned, who is removed—then the public has the right to know the guidance shaping that decision-making.

The manuals of power don’t get to be private simply because they are inconvenient to explain.

Especially not in a country that prides itself on fairness.

Especially not when the consequences are lived.

If justice is public, its playbook should be too.