The term "due process of law" is primarily used in relation to the Fifth and Fourteenth Amendments to the Constitution of the United States. These amendments state that no person shall be deprived of life, liberty, or property without due process of law. The Fifth Amendment applies to the federal government, while the Fourteenth Amendment applies to state governments. The concept of due process ensures that individuals are treated fairly and have the right to a fair trial, legal representation, and the opportunity to present evidence and confront witnesses against them.