Explanation –

Procedure Established by Law: This concept, enshrined in Article 21 of the Indian Constitution, means that a law is valid if it has been enacted following the correct procedure. It focuses on whether the legislative process was followed correctly, without assessing the fairness or justness of the law itself.

Due Process of Law: This doctrine, originating from the U.S. Constitution, not only ensures that the correct procedure is followed but also examines whether the law is fair, just, and reasonable. It provides broader protection for individual rights by allowing the judiciary to evaluate both the procedural and substantive aspects of the law.

Source: The Hindu