Русско-англо-русский юридический словарь

RULE OF LAW. Rules of law are general maxims, formed by the courts, who having observed what is common to many particular cases, announce this conformity by a maxim, which is called a rule; because in doubtful and unforeseen cases, it is a rule for their decision; it embraces particular cases within general principles. (A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. )

In legal theory, a default rule is a rule of law that can be overridden by a contract, trust, will, or other legally effective agreement. (Wikipedia)