The Supreme Court of the United States, for matters that fall under its jurisdiction.
The final authority in the federal system is the Supreme Court.
The highest court in the federal system is the United States Supreme Court, with nine Supreme Court Justices. The states do not share jurisdiction with the federal court, so the states courts are not a part of the federal court system. Each state decides what it calls its highest court. In Texas, there is a separate court for civil versus criminal cases.
Supreme Court
The final authority over what? The answer to this question depends on the subject under discussion.
The act that created a court system and divided authority between the state and federal courts is called the Judiciary Act of 1789.
Congress created the federal court system in the Judiciary Act of 1789, under the authority of Article III, Section 1 of the Constitution.
The Federal Judiciary Act
The US Supreme Court is the highest appellate court in the Judicial Branch of the federal government. It is the highest authority on cases, laws, and constitutional interpretations that fall under its jurisdiction.The Court is the highest authority on federal law (except where Congress has specified otherwise), but not on state law unless the state law is relevant to a case under the Court's review, and is determined to be in conflict with the US Constitution.
it acts as the final authority on the constitutionally of state and Federal Laws
Congress retains the authority to do this. They also have the authority to abolish any federal court except the Supreme Court.
The Supreme Court of Florida is the highest appellate court in the Florida state judicial system.
Congress created the federal court system in the Judiciary Act of 1789, under the authority of Article III, Section 1 of the Constitution.