Which court has the authority to handle constitutional law cases?

The High Court has the authority to handle constitutional law cases primarily because it is the supreme court in Australia with the specific role of interpreting and applying the Constitution. It has the jurisdiction to hear cases that involve constitutional questions, which may include matters regarding the division of powers between the federal and state governments, the validity of legislation, and issues related to the rights and freedoms outlined in the Constitution.

This capacity makes the High Court crucial in safeguarding and interpreting the Constitution. It is often tasked with resolving disputes that directly relate to constitutional law, making it the definitive forum for such cases. The High Court's decisions set precedents that affect the interpretation of constitutional law across the entire legal landscape in Australia. Other courts, like the Family Court, Federal Court, and Magistrates Court, do not have this specific constitutional jurisdiction and primarily deal with other types of cases such as family law, federal law, or minor criminal cases, respectively.