  All this points to another and related tension. This is the tension between the radical ideology view and the concept of the rule of law, the centrepiece of a liberal legal order. At their most basic, the terms the rule of law, due process, procedural justice, legal formality, procedural rationality, justice as regularity, all refer to the idea that law should meet certain procedural requirements so that the individual is enabled to obey it. These requirements center on the principle that the law be general, that it take the form of rules. Law by definition should be directed to more than a particular situation or individual; as Lon Fuller notes, the rule of law also requires that law be relatively certain, clearly expressed, open, prospective and adequately publicised.