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Derogation is the partial suppression of a law, as opposed to abrogation—total abolition of a law by explicit repeal—and obrogation—the partial or total modification or repeal of a law by the imposition of a later and contrary one. The term is used in canon law, civil law, and common law. It is sometimes used, loosely, to mean abrogation, as in the legal maxim: Lex posterior derogat priori, i.e. a subsequent law imparts the abolition of a previous one.

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Derogation is the partial suppression of a law, as opposed to abrogation—total abolition of a law by explicit repeal—and obrogation—the partial or total modification or repeal of a law by the imposition of a later and contrary one. The term is used in canon law, civil law, and common law. It is sometimes used, loosely, to mean abrogation, as in the legal maxim: Lex posterior derogat priori, i.e. a subsequent law imparts the abolition of a previous one.

Derogation differs from dispensation in that it applies to the law, where dispensation applies to specific people affected by the law.

In terms of European Union legislation, a derogation can also imply that a member state delays the implementation of an element of an EU Regulation (etc.) into their legal system over a given timescale, such as five years; or that a member state has opted not to enforce a specific provision in a treaty due to internal circumstances (typically a state of emergency).