"(in the US) They do NOT become involved in the legislative process! Under the separation of the powers of government, the Judicial Branch has no input on the writing of laws."
I am not sure the above answer is completely correct.
While the U. S. does have an effective separation of power due to the three branches of government provided by the Constitution, these three branches do not always agree on the interpretation or application of the constitution. When disagreements arise, the courts do become involved.
Since Marbury v. Madison (1803), U. S. Supreme Court claimed the power to resolve conflicting interpretations of the U. S. Constitution. Therefore, it is involved in the legislative process.
If the Court determines that a statute does not conform to the U. S. Constitution, then the statute is invalid. If a statute is invalid, the Court cannot enforce it.
Constitutional Courts - mandated by the constitution Legislative Courts
Legislative courts are those federal courts set up by Congress under its implied or plenary powers, for special purposes. For example, the Court of Military Appeals, the Court of Veterans Appeals, and territorial courts are legislative courts, whose judges serve fixed-length terms.
Congress has the power to create lower federal courts, therefore the Legislative branch has the power to create these courts.
the Legislative courts help Congress exercise its powers.
US Special Courts (courts of special or limited jurisdiction) organized under Congress' authority in Article I are sometimes called legislative courts because they are part of the Legislative Branch of government. Examples of legislative courts include US Bankruptcy Court, US Tax Court, and the US Court of Federal Claims. Courts established under Congress' authority in Article III are sometimes called constitutional courts. Constitutional courts comprise the Judicial Branch of government, which is independent of the Legislative Branch. The US District Courts, Court of International Trade, US Court of Appeals Circuit Courts, and Supreme Court of the United States make up the Judicial Branch of government.
Legislative, Constitutional
legislative executive and judgical
legislative, judicial, and executive
Both the Executive and Legislative. But mainly the Executive.
Legislative branch
Legislative
Congress has the authority to establish federal courts; state legislative bodies establish state courts.