THE FULFILLMENT OF THE PRINCIPLES OF LEGAL CERTAINTY AND JUSTICE IN THE REGULATION OF THE DUAL AUTHORITY OF THE MAYOR AS EX-OFFICIO IN THE BATAM CITY. IJITE [Internet]. 2026 Jun. 30 [cited 2026 Jul. 15];(2(54). Available from: https://rspublisher.org/index.php/ijite/article/view/4816