Substantive Due Process

The substantive limitations placed on the content or subject matter of state and federal laws by the Due Process Clauses of the Fifth and Fourteenth Amendments to the U.S. Constitution.

In general, substantive due process prohibits the government from infringing on fundamental constitutional liberties. By contrast, procedural due process refers to the procedural limitations placed on the manner in which a law is administered, applied, or enforced. Thus, procedural due process prohibits the government from arbitrarily depriving individuals of legally protected interests without first giving them notice and the opportunity to be heard.

The Due Process Clause provides that no person shall be "deprived of life, liberty, or property without due process of law." When courts face questions concerning procedural due process, the controlling word in this clause is process. Courts must determine how much process is due in a particular hearing to satisfy the fairness requirements of the Constitution. When courts face questions concerning substantive due process, the controlling issue is liberty. Courts must determine the nature and the scope of the liberty protected by the Constitution before affording litigants a particular freedom.