A policy is not yet a law
Governments, opposition parties, committees, community organisations and individual parliamentarians can all generate ideas for legislative change. Before Parliament can vote on a proposed law, the proposal is prepared as a bill. Most successful federal bills are introduced by government ministers, but private members and senators can also introduce bills.
This distinction is crucial when reading political news. A media release can announce an intention months before legislation is introduced. Even after a bill is introduced, its text can change substantially before it reaches its final form.
Readings and debate in the first chamber
A bill normally goes through a first reading, second-reading stage and third reading in each chamber. The first reading formally introduces the bill. The second-reading stage is where parliamentarians debate the bill's main purpose and principles. Detailed consideration can follow, including proposed amendments. The third reading is the final vote on the bill in that chamber.
The terminology can sound ceremonial, but each stage marks a real procedural step. Reports saying a bill has 'passed the House' usually mean it has completed the necessary stages there; that does not mean the entire federal legislative process is finished.
The second chamber and amendments
After one chamber passes a bill, it goes to the other. The second chamber can pass the text as received, reject it or amend it. If the text changes, the originating chamber must decide whether to accept those changes. A bill cannot become law until both houses have agreed to identical text, subject to the constitutional rules governing particular financial bills.
Negotiation is therefore a normal part of law-making, especially where the government lacks a majority in the Senate. Amendments may narrow, expand or otherwise alter the practical effect of the original proposal.
Committee scrutiny can happen before the final vote
Bills can be referred to parliamentary committees for inquiry. Committees may call for public submissions, hold hearings, question officials and experts, and report recommendations. A committee report does not itself change the bill, but it can influence amendments and political support.
For readers trying to understand a controversial proposal, a committee inquiry can be more informative than campaign messaging because it gathers evidence from multiple perspectives and places submissions and transcripts on the public record.
Royal Assent and commencement
Once both houses agree to the same bill, it is presented to the Governor-General for Royal Assent. At that point it becomes an Act of Parliament. The date the law actually starts operating depends on the commencement provisions in the Act. Some provisions begin on Royal Assent, some on a specified date, and others after a later proclamation or statutory period.
That means even the phrase 'the law has passed' can leave one more question: when does it take effect? For practical decisions, always check the Act or an authoritative government source for commencement details.
Primary sources and further reading
We use authoritative Australian institutions as the starting point for this explainer. Follow these links for the underlying rules, official guidance and current details.