Fajar Utama et al. 2026. LEGAL ANALYSIS OF THE EFFECTIVENESS OF THE POLICY OF REFUSAL OF ENTRY FOR FOREIGN CITIZENS IN THE FRAMEWORK OF MAINTAINING STATE SOVEREIGNTY AT THE SEA IMMIGRATION INSPECTION PLACE IN BATAM CITY (RESEARCH STUDY AT BATAM CENTER INTERNATIONAL PORT). Journal of International Islamic Law, Human Right and Public Policy. 4, 4 (Sep. 2026), 2322–2329.