THE VIOLATION OF THE PRINCIPLES OF THE LAW RESERVATION AND THE REASONABILITY OF TAX ISSUES ON RULING LAW Nº 27260 ABOUT SINCERE FISCAL REGIME AND ITS PRETENDED UNCONSTITUTIONAL DECLARATION. Perspectivas [Internet]. 2020 Jul. 31 [cited 2026 Jul. 28];10(2). Available from: https://cerac.unlpam.edu.ar/index.php/perspectivas/article/view/5215