Institutional Repository UIN Sunan Kalijaga YogyakartaHUBUNGAN UNDANG-UNDANG IBU KOTA NUSANTARA TERHADAP UNDANG-UNDANG POKOK AGRARIA DALAM PENGATURAN PERTANAHANNIM.: 22103070081Erlina FauzanitaauthorThis research is prompted by the enactment of Law Number 21 of 2023 concerning the Nusantara Capital City, which introduces changes to land regulations—specifically regarding the granting of Cultivation Rights (HGU) and Building Rights (HGB)—in contrast to Law Number 5 of 1960 concerning Basic Regulations on Agrarian Principles, which serves as the foundation of national agrarian law. These differences give rise to issues concerning the relationship between the two laws and their applicability to land regulation within the Nusantara Capital City area. This study aims to examine the relationship between the Nusantara Capital City Law and the Basic Agrarian Law regarding the regulation of land rights, analyzing the discrepancies between the two statutes through the application of the lex specialis derogat legi generalis principle. It is a normative legal study employing statutory, conceptual, and historical approaches. The legal materials utilized include legislation, Constitutional Court Decision Number 185/PUU-XXII/2024, books, articles, and relevant legal literature. A qualitative analysis is conducted by examining the relationship and alignment of the regulations concerning land rights as stipulated in the Basic Agrarian Law and the Nusantara Capital City Law. Research findings indicate that the Basic Agrarian Law (UUPA) serves as the primary legal foundation within the national agrarian legal system, whereas the IKN Law functions as a special regulation governing the administration of the Nusantara Capital City (IKN), including land-related matters. Based on the principle of lex specialis derogat legi generali, the specific provisions of the IKN Law apply to matters specifically regulated within the IKN territory, while the UUPA remains part of the national agrarian legal framework. Consequently, the existence of the IKN Law does not entirely negate the applicability of the UUPA; rather, it establishes a relationship between general and specific provisions that requires harmonization. Constitutional Court Decision Number 185/PUU-XXII/2024 further highlights inconsistencies between the IKN Law and the UUPA. Viewed from the perspective of maslahah mursalah (public interest/benefit), the application of these special regulations must be directed toward the public good—specifically by ensuring legal certainty, protecting land rights, and supporting IKN development interests—without disregarding the principles of national agrarian law.342 Hukum Tata Negara2026-08-06UIN SUNAN KALIJAGA YOGYAKARTA;FAKULTAS SYARIAH DAN HUKUMThesis

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