Part 3.3: Separation of Powers

The Australian Constitution divides the power of government into three separate branches. This is deliberately designed to stop one person, or one group, from holding all the power. Each branch has a different role and acts as a check on the others.

The Three Branches of Power

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Legislative Power

Parliament

Power to make & change laws

Made up of elected representatives of the people. Includes the House of Representatives and the Senate.

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Executive Power

Government

Power to put laws into practice

The Prime Minister, Cabinet ministers, and the Governor-General. Ministers are responsible for government departments.

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Judicial Power

Courts & Judges

Power to interpret & apply laws

Courts and judges are independent of parliament and government. No one can tell them what to decide.

Written into the Constitution: These three powers — legislative, executive, and judicial — are written into the Australian Constitution. This protects Australia's democratic system from any one group seizing total control.

Legislative Power — Parliament

Legislative power is the power to make laws. Parliament has the power to make and change the laws in Australia. Parliament is made up of representatives who are elected by the people of Australia.

The Federal Parliament has two houses: the House of Representatives (lower house, where the government is formed) and the Senate (upper house, which reviews bills and represents the states).

Executive Power — Government

Executive power is the power to put the laws into practice — to run the country day to day. The Executive includes:

Judicial Power — Courts & Judges

Judicial power is the power to interpret and apply the law. Courts and judges are independent of parliament and government — this is essential to the rule of law.

No government or parliament can tell a judge what to decide in a court case. This independence protects the rights of every person in Australia. At the top of the judicial system is the High Court of Australia, which has the ultimate power to apply and interpret the laws of Australia.

Why Separation Matters: By dividing power into three separate arms, Australia prevents a situation where any single person, party or group could become all-powerful. Each branch checks the others — Parliament makes the law, the Government runs the country, the Courts ensure the law is followed fairly.

Key Points to Remember

Legislative power = Parliament = the power to make and change laws
Executive power = PM, Ministers & Governor-General = the power to put laws into practice
Judicial power = Courts & Judges = the power to interpret and apply laws
Courts and judges are independent of parliament and government — no one can tell them what to decide
These three powers are written into the Australian Constitution
The separation of powers prevents any one person or group from holding all the power

Quick Check

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Question 1 of 5

Who holds legislative power in Australia?

The courts and judges Parliament — the power to make and change laws The Prime Minister alone

Why it matters: Legislative power is the power to make and change laws. This power belongs to Parliament (the elected representatives of the people). Parliament is distinct from the executive (which runs the government) and the judiciary (which interprets laws).

Question 2 of 5

What is executive power?

The power to make new laws in parliament The power to decide if someone is guilty in court The power to put the laws into practice, held by the PM, ministers and the Governor-General

Why it matters: Executive power is the day-to-day running of the government. The Executive includes the Prime Minister, government ministers (responsible for portfolios) and the Governor-General. This is different from making laws (legislative) or interpreting them (judicial).

Question 3 of 5

Are courts and judges in Australia independent of the government?

Yes — courts and judges are independent; no one can tell them what to decide No — the Prime Minister can direct courts on major decisions Only the High Court is independent; lower courts answer to the government

Why it matters: Courts and judges are fully independent of parliament and government. This is a cornerstone of the rule of law. No person — not even the Prime Minister — can tell a judge what decision to reach. Judicial independence protects every person's rights.

Question 4 of 5

Why does the Australian Constitution divide power into three separate branches?

To make government more efficient by splitting administrative tasks To stop one person or group from holding all the power To allow the states to have their own separate governments

Why it matters: The separation of powers is a safeguard for democracy. By dividing power between Parliament (makes laws), the Executive (runs government), and the Judiciary (interprets laws), the Constitution ensures no single person or group can seize total control of Australia.

Question 5 of 5

Where are the three powers of government written?

In the Declaration of Independence In the Prime Minister's policy platform In the Australian Constitution

Why it matters: The separation of legislative, executive and judicial powers is written into the Australian Constitution. This means it cannot be easily changed — it requires a referendum with a double majority to alter these fundamental rules of government.