Ethical issues in Indonesia’s legal practice and public bureaucracy frequently arise from fragmented authority, overlapping regulations, and weak coordination among oversight institutions. This article examines the feasibility of reconstructing the One Roof System (Sistem Satu Atap), previously applied to judicial reform, as a model for integrated ethics enforcement through a National Ethics Institution (Lembaga Etik Nasional). Using normative legal research with statutory, conceptual, and comparative approaches, the discussion maps ethics enforcement in Indonesia, draws lessons from the pre- and post-2004 judicial One Roof System reform, and proposes an institutional design comprising an authority structure, coordination mechanisms, a single-window complaint mechanism, and a phased implementation roadmap. The analysis indicates that a centralised institutional design can strengthen standardisation, independence, and accountability, provided it is supported by an adequate legal basis, external oversight safeguards, and careful management of authority relations with constitutionally anchored institutions. These findings require further legislative elaboration and empirical testing.
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