- Article 21 states that no person shall be deprived of his life or personal liberty except according to "procedure established by law". This is the cornerstone for judicial review of executive and legislative actions regarding life and liberty. - The Indian approach contrasts with the "Due Process of Law" principle followed in the USA, which allows the judiciary to examine not only whether a law was passed according to established procedure but also whether the law itself is fair, just, and reasonable. - While Indian courts, particularly after the Maneka Gandhi case (1978), have interpreted "procedure established by law" expansively to include elements of due process, the explicit constitutional basis for judicial review relating to life and liberty is "Procedure established by Law". - Arbitration is a method of alternative dispute resolution. - Natural Justice comprises principles like audi alteram partem (hear the other side) and nemo judex in causa sua (no one should be a judge in his own case); these are applied within judicial review but are not the fundamental principle on which the power of judicial review rests in the constitutional text.