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Law::
ex post facto law : a law passed after an action in order to retroactively change the legal treatment of the action to the disadvantage of the actor; ex post facto criminal laws are unconstitutional. In Iran, such laws are generally unconstitutional and against the provisions of the civil code of the country.
فرهنگ تشریحی - کاربردی حقوق تالیف هرمز رشدیه