The regulation of polygamy in Islamic law and Indonesian marriage law is not only related to the permissibility and licensing procedures, but also the protection of the rights and interests of all family members. Problems arise when fulfilling formal requirements does not guarantee substantive protection for wives and children. This study aims to reconstruct the regulation of polygamy in Law Number 1 of 1974 concerning Marriage through the approach of the maqāṣid al-syarī‘ah system of Jasser Auda to place family protection as the orientation of law implementation. This research is a normative legal research (doctrinal legal research) with a statutory, conceptual, and maqāṣid al-syarī‘ah system approach. Primary legal materials include QS. An-Nisā’ verse 3 and laws and regulations related to marriage, while secondary legal materials include classical fiqh literature, Jasser Auda's thoughts, and scientific journal articles. The results of the study indicate that court permission, wife's consent, economic capacity, and guarantees of justice need to be understood as a unified instrument of family protection, not merely administrative requirements. Through the six characteristics of Jasser Auda's systemic approach, polygamy regulations can be evaluated based on their ability to protect wives' rights, ensure the fulfillment of children's needs and care, and prevent harm. Regulatory reconstruction is directed at strengthening substantive examination and protecting family rights in legal implementation.
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