Which type of due process relates to the fairness of procedures used?

The concept of due process is foundational in the legal system, ensuring that individuals receive fair treatment under the law. Procedural due process specifically addresses the fairness of the methods and procedures used in legal proceedings. It emphasizes that before an individual can be deprived of life, liberty, or property, they must be given a fair and adequate opportunity to present their case. This includes the right to be heard, the right to notice of the charges or claims against them, and access to a neutral decision-maker.

In contrast, substantive due process deals with the underlying rights at stake, such as the right to privacy or the right to marry, focusing on the content of laws themselves rather than the procedures utilized in making legal determinations. Legislative and judicial, while relevant to the broader context of the legal system, do not specifically address the fairness of procedures. Therefore, procedural due process is the correct choice as it directly relates to the fairness of the procedures that govern legal processes.