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| | A. Boudinhon |
 | | The common law, therefore, is that which is to be observed with regard to a certain matter, unless the legislator has foreseen or granted exceptions; for instance, the laws regulating benefices contain special provisions for benefices subject to the right of patronage. |
 | | The law of these three periods is referred to respectively as the ancient, the new, and the recent law (jus antiquum, novum, novissimum), though some writers prefer to speak of the ancient law, the law of the Middle Ages, and the modern law (Laurentius, "Instit.", n.4). |
 | | Laws in general, and irritant laws in particular, are not retroactive, unless such is expressly declared by the legislator to be the case. |
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