Derogation
Derogation, in civil law as well as common law, is the partial suppression of the law, as opposed to annulment calculation abolition of a law by explicit repeal, together with obrogation the partial or total adjustment or repeal of a law by the imposition of a later and contrary one. it is for sometimes used, loosely, to intend abrogation, as in the legal maxim lex posterior derogat priori a subsequent law derogates the preceding one.
The term is also used in Catholic canon law, and in this context differs from dispensation in that it applies to the law, whereas dispensation applies to specific people affected by the law.