РАЗВИТИЕ НА ПРИНЦИПА ЗА НЕРЕТРОАКТИВНОТО ДЕЙСТВИЕ НА ЗАКОНА В РИМСКОТО ЧАСТНО ПРАВО И НАДГРАЖДАНЕТО МУ С ДОКТРИНАТА ЗА ЗАЧИТАНЕ НА ПРИДОБИТИТЕ ПРАВА (IURA QUAESITA) В ИНТЕРТЕМПОРАЛНОТО ПРАВО НА IUS COMMUNE
ТHE DEVELOPMENT OF THE PRINCIPLE OF NON-RETROACTIVITY OF LEGAL PROVISIONS IN ROMAN PRIVATE LAW AND ITS SUBSEQUENT UPGRADE BY THE DOCTRINE OF VESTED RIGHTS (IURA QUAESITA) IN THE TRANSITIONAL LAW OF IUS COMMUNE

Summary/Abstract: The present article traces the development of the principle of non-retroactive effect of the legal provisions in Roman private law and its subsequent upgrade by the doctrine of iura quaesita in the Middle Ages. The doctrine of iura quaesita (vested rights) provides for non-cancellation of dully acquired rights with а retroactive effect. The first part of the article indicates some important sources of Roman law, which establish the principle of non-retroactive effect of the legal provisions. The second part of the article discusses the influence of the doctrine of vested rights on the case-law of the Court of Justice of the European Union, as well as the Bulgarian Constitutional Court. The article reveals how they implement this doctrine in connection with the principle of rule of law, legal certainty, protection of the reliance in the stability and predictability of the established legal order.

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