Global climate change demands that every country accelerate decarbonization measures, including Indonesia, which is committed to achieving Net Zero Emissions by 2060. One potential mitigation strategy is the implementation of Carbon Capture Storage (CCS) and Carbon Capture Utilization and Storage (CCUS) technology in the oil and gas sector. However, the implementation of CCS/CCUS in Indonesia still faces significant legal and institutional challenges. This study aims to analyze the normative, institutional, and policy barriers to CCS/CCUS implementation and to formulate an ideal legal framework to support decarbonization projects in the oil and gas sector. The method used is normative legal research with legislative, conceptual, and comparative approaches. The results show that the absence of lex specialis related to CCS/CCUS causes legal uncertainty, especially in the aspects of licensing, post-carbon storage environmental responsibilities, and legal protection for investors. In addition, overlapping authorities between the Ministry of Energy and Mineral Resources, the Ministry of Environment and Forestry, and the Upstream Oil and Gas Regulatory Special Task Force (SKK Migas) weaken the effectiveness of supervision. Therefore, the establishment of specific regulations and integrated institutions is needed to govern the implementation of CCS/CCUS, including establishing a liability regime and economic incentive mechanisms. Therefore, the formulation of a comprehensive CCS/CCUS legal framework is a key prerequisite for the success of decarbonization projects in the oil and gas sector in Indonesia.
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