
A constitutional court is a high court that deals with constitutional law. Its primary function is to rule on whether challenged laws are unconstitutional, i.e. whether they conflict with constitutionally established rules, rights, and freedoms. The Austrian Constitutional Court, established in 1921, is the oldest constitutional court in the world. The US Supreme Court is often included in comparative works on constitutional courts, although it is not technically one. Constitutional Courts based on Kelsen's Austrian model are the result of constitutional design, with their jurisdiction including judicial review of legislation and adjudication of constitutional disputes.
| Characteristics | Values |
|---|---|
| Deals with constitutional law | Rules on whether laws are unconstitutional |
| Highest court on constitutional matters | Interprets, protects and enforces the Constitution |
| Jurisdiction over constitutional matters | Reviews the compatibility of state laws with the state constitution |
| Adjudicates constitutional disputes | |
| Reviews electoral complaints | |
| Hears cases concerning complaints against referendums and popular initiatives | |
| Rules on human rights cases | |
| Interprets the application of the Constitution | |
| Determines whether the law was applied correctly in the trial court | |
| Determines the facts and applies the law to those facts | |
| Has the power of judicial review | |
| Determines the constitutionality of federal laws |
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What You'll Learn

Interpreting the constitution
Constitutional courts are often the highest court in the country when it comes to interpreting the constitution, and their decisions are binding on every other authority. For example, the Constitutional Court of South Africa is the highest court on constitutional matters, and its jurisdiction is restricted to constitutional issues.
The constitutional court's role in interpreting the constitution is to ensure that laws challenged are not unconstitutional. This means that they examine whether laws conflict with constitutionally established rules, rights, and freedoms. The court's hearings are open to the public, and the media may attend to report on its work.
In some countries, like the United States, there is an 'American System' where the Supreme Court acts like a specialised constitutional court, concentrating on cases with constitutional implications. However, in countries with a 'diffuse' system, like common law countries and Scandinavia, ordinary courts handle constitutional questions as only a minor part of their function, and judicial review is rarely exercised.
The Austrian System, on the other hand, involves a separate special constitutional court that only hears cases concerning the constitutionality of the national legislature's acts. This system was first established in 1920 in Czechoslovakia and then in 1921 in Austria, and it has since been adopted by many other countries.
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Protecting and enforcing the constitution
A constitutional court is a high court that deals primarily with constitutional law. Its main authority is to rule on whether challenged laws are unconstitutional, i.e., whether they conflict with constitutionally established rules, rights, and freedoms, among other things. The Austrian System, established in 1920, is a dedicated court for the judicial review of parliamentary laws. This system has been adopted by many countries.
Constitutional Courts (CCs) are specialized courts with jurisdiction over constitutional matters. CCs' jurisdiction typically includes judicial review of legislation and adjudication of constitutional disputes. The US Supreme Court is an example of a court that functions as a CC in a sociological sense, although it is not technically one. The US Supreme Court is the highest court in the country and has the authority to decide the constitutionality of federal laws and resolve other cases involving federal laws.
In South Africa, the Constitutional Court is the highest court on constitutional matters. Its jurisdiction is restricted to constitutional matters and issues connected with decisions on constitutional matters. It interprets, protects, and enforces the Constitution. The Court's hearings are open to the public and the press may attend. The bulk of the judges' work consists of analyzing documents and preparing judgments.
In some countries, there are no separate constitutional courts. Instead, they delegate constitutional judicial authority to their ordinary court system, with the final decision-making power resting in the supreme ordinary court. For example, in the United Kingdom and New Zealand, the constitution is at the disposal of the lawmaker. In Israel, the Supreme Court has developed general principles, such as the principle of human dignity, to control the lawmaker.
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Reviewing the constitutionality of laws
A constitutional court is a high court that deals primarily with constitutional law. Its main authority is to rule on whether challenged laws are unconstitutional—that is, whether they conflict with constitutionally established rules, rights, and freedoms. The US Supreme Court, for instance, has been called the world's oldest constitutional court because it was one of the earliest to invalidate a law as unconstitutional.
The Austrian System, which emerged with the establishment of the First Austrian Republic's dedicated constitutional court in 1919, is a system in which a separate special constitutional court hears cases concerning the constitutionality of the national legislature's acts. This system has been adopted by many other countries.
Constitutional courts based on the Austrian model are the result of constitutional design. Their jurisdiction typically includes judicial review of legislation and adjudication of constitutional disputes. The rules for the selection of judges seek to reconcile democratic legitimacy and safeguards for independence.
In South Africa, the Constitutional Court is the highest court on constitutional matters. Its jurisdiction is restricted to constitutional matters and issues connected with decisions on constitutional matters. It interprets, protects, and enforces the Constitution. The court functions largely as a court of appeal, considering the record of the evidence heard in the original court that heard the matter. It does not hear evidence or question witnesses. Each judge must indicate their decision, and the ruling is determined by a majority vote. The reasons are published in a written judgment.
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Hearing cases on constitutional matters
A constitutional court is a high court that deals primarily with constitutional law. Its main function is to rule on whether challenged laws are unconstitutional—that is, whether they conflict with constitutionally established rules, rights, and freedoms.
Constitutional courts are specialised courts with jurisdiction over constitutional matters. Their jurisdiction typically includes judicial review of legislation and the adjudication of constitutional disputes. In some countries, there are separate constitutional courts, while others delegate constitutional authority to their ordinary court system, with the final decision-making power resting in the supreme ordinary court.
The Austrian System, which established the first dedicated constitutional court in 1919, has been adopted by many countries. This system involves a separate special constitutional court that only hears cases concerning the constitutionality of the national legislature's acts. The Austrian Constitutional Court, established in 1921, is the oldest in the world.
Constitutional courts hear cases and decide matters of great importance and interest to the public. They are open to the public and the press, with cameras usually allowed in court throughout a hearing. The South African Constitutional Court, for example, is the country's highest court on constitutional matters. It interprets, protects, and enforces the Constitution, dealing exclusively with constitutional matters—those cases that raise questions about the application or interpretation of the Constitution.
The procedure for bringing a case before a constitutional court is set out in the rules of the court. For example, in the South African Constitutional Court, a quorum of at least eight judges is required to hear a case, although all 11 judges typically hear every case. The court does not hear evidence or question witnesses but considers the record of evidence heard in the original court. The hearings tackle difficult issues raised by the written arguments presented to the court, and each judge must indicate their decision. The ruling is then determined by majority vote, and the reasons are published in a written judgment.
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Safeguarding human rights
A constitutional court is a high court that deals primarily with constitutional law. Its main authority is to rule on whether laws that are challenged are unconstitutional—that is, whether they conflict with constitutionally established rules, rights, and freedoms. Constitutional courts are independent and autonomous and are not dependent on or working under or within any other body. Their decisions are binding on every other authority.
The Austrian System, which was first established in 1920, is a dedicated court for judicial review of parliamentary laws. This system has been adopted by many countries. The US Supreme Court, while not technically a constitutional court, acts very much like one in a sociological sense. It concentrates on cases with constitutional implications, and its judges are selected with their constitutional role in mind.
Constitutional courts are an important safeguard for human rights. They provide a mechanism for individuals to have their human rights cases heard and decided upon by a specialized court. This ensures that human rights issues are given the attention and expertise they deserve and helps to protect and enforce constitutional rights. For example, in Israel, the Supreme Court has developed general principles, especially the principle of human dignity, to control the lawmaker.
The South African Constitutional Court is the highest court in the country when it comes to the interpretation, protection, and enforcement of the Constitution. It deals exclusively with constitutional matters and issues connected with decisions on constitutional matters. The Court's hearings are open to the public, and the media is allowed to attend and film, assisting in reporting on its work.
The US Supreme Court is the highest court in the United States and has the authority to decide the constitutionality of federal laws and resolve other cases involving federal laws. The US system of government has three branches—legislative, executive, and judicial—which operate within a constitutional system of "checks and balances." This means that while each branch is formally separate, the Constitution often requires cooperation among them.
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Frequently asked questions
A constitutional court is a high court that deals with constitutional matters. Its main authority is to rule on whether challenged laws are unconstitutional, i.e. whether they conflict with constitutionally established rules, rights, and freedoms.
Constitutional Courts (CCs) are specialised courts with jurisdiction over constitutional matters. They are distinct from ordinary courts, which may only deal with constitutional questions as a minor part of their function.
The Constitutional Court of Austria, established in 1919, was the first dedicated constitutional court. The Supreme Court of the United States is also considered a constitutional court, though it is an atypical case as it is not technically a CC.
A quorum of at least eight judges is required to hear a case, though typically all 11 judges hear every case. The court does not hear evidence or question witnesses but considers the record of evidence from the original court. Hearings are open to the public and the press.
Each judge sitting in a case must indicate their decision, and the ruling is determined by a majority vote. The reasons for the ruling are published in a written judgment.

























