Most people meet Australian law through the detail, not the Act. A rate, a form, a reporting obligation, an eligibility condition — these usually sit in a regulation, rule or determination rather than in the statute itself. This guide explains how to locate that delegated legislation, confirm which Act authorises it, and read the version that actually applied at the time you care about.
Start with the Act, not the rule
Legislation is a fundamental source of law in Australia, and the structure is worth understanding before you search. Parliament passes an Act that sets the framework and gives a minister, agency or other body the power to make rules on matters of detail. Those rules are the delegated or subordinate legislation.
That means the Act is your entry point. Read the provisions that create the power to make instruments, because they also limit it: they tell you who may make the instrument, on what subject matter, and what it may deal with. If you start from the instrument alone, you can misread its scope.
One check comes first, and it decides everything that follows: is this federal or state/territory law? The UNSW Law Library's legislation guide advises checking the title of the Act to identify the jurisdiction. An Act titled with "(Cth)" or without a state reference in the Commonwealth context points one way; an Act naming New South Wales, Victoria, Queensland and so on points to that jurisdiction's own parliament and its own legislation website. This article focuses on Commonwealth law, which is what the Federal Register of Legislation covers.
What counts as a legislative instrument
The Federal Register of Legislation defines legislative instruments, or LIs, as laws on matters of detail made by a person or body authorised to do so by the relevant authorising legislation. The Register's legislative instruments page lists regulations, rules and determinations as examples, and refers to the Legislation Act 2003.
Two practical points follow from that definition. First, an instrument is only law because an Act allows it to be — the authorising legislation is the source of its authority. Second, "instrument" is a broad category, not a synonym for "regulation". A document that looks administrative may still be a legislative instrument, so it is worth checking how the Register classifies it rather than assuming from its name.
Where to look: the Federal Register of Legislation
The Federal Register of Legislation is the authorised whole-of-government website for Commonwealth legislation and related documents, at legislation.gov.au. It is the source to use for Commonwealth law, rather than a summary, a commentary site or a secondary article.
The Register holds the full text of Commonwealth Acts in three forms — in force, as made, and point-in-time — along with Bills, legislative instruments (described as subordinate legislation) and gazettes. It also contains details of the lifecycle of individual laws and the relationships between them, which is what lets you trace how one law was amended by, or made under, another.
A word of caution when searching: results may also surface a similarly named site covering as-made Acts of Parliament in England, Wales and Scotland from 1235 and Statutory Instruments from 1949. That is United Kingdom legislation and is not Australian law. Check the domain and the jurisdiction before relying on anything.
Choose the right version of the text
Reading the wrong version is the most common error when checking what a law required at a particular date.
| Version | What it shows | When to use it |
|---|---|---|
| In force | The law as it currently operates | Checking today's obligations or entitlements |
| As made | The law as originally enacted or made | Seeing the original scope before later amendment |
| Point in time | The law as it stood on a chosen date | Checking what applied on a past or specified date |
If your question concerns a past decision, a historical entitlement or a compliance period that has closed, "in force" will give you the wrong answer. Use the point-in-time version.
Trace the lifecycle and the relationships
Because the Register records the lifecycle of individual laws and the relationships between them, you can move in both directions: from an Act down to the instruments made under it, and from an instrument back up to the Act that authorises it.
In practice, that means checking whether the instrument you are reading has been amended since it was made, whether it has been repealed or replaced, and whether another instrument or Act modified its operation. An instrument that appears current in a search result may have been superseded; the lifecycle detail is where you confirm that.
It is also worth recognising how much easier this is than it used to be. Before consolidations or compilations were published electronically on the Register, users of legislation relied on printed versions of the law. Electronic compilation means the in-force text incorporates amendments for you, but it also means you should be deliberate about which version you are reading and when it was compiled.
Confirming the jurisdiction before you rely on it
A Commonwealth instrument and a state or territory instrument can cover similar subject matter with different requirements. If the Act is a state or territory Act, the Federal Register of Legislation will not be the authoritative source for it, and you should check the relevant jurisdiction's official legislation website instead. The title of the Act is the quickest way to identify this.
Where a Commonwealth instrument and a state or territory law both apply to your situation, you may need to read both. Confirm which jurisdiction's law governs your circumstances before drawing conclusions from either.
Keeping up with changes
The Register publishes a list of new and amended titles recently published on the Federal Register of Legislation within the last 7 days. If you need to monitor a policy area rather than answer a single question, that listing is the starting point for seeing what has changed recently, and it is worth checking on a regular cycle rather than relying on secondary reporting about what a change means.
Questions to verify as you read
The Register gives you the text; you still have to interpret it. Work through these:
- Which Act authorises this instrument, and which section creates the power?
- Is the document a legislative instrument, or something else — and how does the Register classify it?
- Which version am I reading, and does it match the date I care about?
- Has the instrument been amended, repealed or replaced since it was made?
- Is this Commonwealth law, or does a state or territory Act apply instead?
- Does another instrument or Act modify how this one operates?
If a provision is genuinely ambiguous, or the consequences of getting it wrong are significant, that is the point at which to seek advice from a qualified legal practitioner.
Next steps
Pick the Act behind the requirement you are investigating and find it on the Federal Register of Legislation. Note the section that authorises instruments, then find the instrument made under it and read it in the version matching your date. Record the title, the version date and the authorising provision, so that anyone checking your work later can follow the same path.
If the Act is a state or territory Act, repeat the process on that jurisdiction's official legislation website.
General information only
This article is general information about how to find and read Australian regulations and legislative instruments. It is not legal advice, and it does not attempt to interpret any provision for your circumstances. Legislative text changes; always read the current registered version on the official source and confirm the details that matter to you before acting.