<![CDATA[The Indonesian Constitution, through Article 18B paragraph (2), Article 28I paragraph (3), and Article 33 paragraph (3) of the 1945 Constitution of the Republic of Indonesia, expressly mandates the recognition and respect of indigenous legal communities (MHA) and their traditional rights, and places natural resources under the control of the state for the greatest prosperity of the people. However, current positive legal practices show inconsistencies, particularly in the provisions of Article 22 of the Coastal Areas and Small Islands Law, which has been amended through the Job Creation Law with Article 138 paragraph (4) of Government Regulation Number 21 of 2021. This inconsistency has an impact on legal uncertainty in MHA management areas, the potential for criminalization of coastal indigenous communities, conflicts of authority between ministries, and the neglect of the principle of legal pluralism guaranteed by the constitution. This research uses a normative juridical method with a statutory and conceptual regulatory approach, supported by primary, secondary, and tertiary legal materials that are analyzed prescriptively through systematic and teleological interpretation. The research findings indicate that an ideal formulation of ius constituendum is needed through a paradigm shift in natural resource management from state-based to community-based, automatic recognition of indigenous peoples' (MHA) management areas, legal certainty in the RTRW (Regional Spatial Plan), preventive and repressive legal protection, and the establishment of customary territory management institutions. These regulations are crucial for realizing a national legal system that guarantees legal certainty, substantive justice, social benefits, and the sustainability of coastal ecosystems.]]>
