The phenomenon of premarital pregnancy presents complex legal challenges in Indonesia, particularly in marriage registration at the Office of Religious Affairs (KUA). This article examines the harmonization of Islamic law and positive law, particularly in the dimensions of Islamic legal legislation and the practice of registering marriages resulting from premarital pregnancies. Using a normative-juridical and conceptual approach, this study analyzes the perspectives of four main schools of thought (madhhab) (Hanafi, Maliki, Shafi'i, and Hanbali), the provisions of Article 53 of the Compilation of Islamic Law (KHI), and Constitutional Court Decision No. 46/PUU-VIII/2010. The results of the study indicate significant normative tensions, particularly on the issue of child lineage, between classical fiqh doctrine and contemporary Indonesian positive law. This article recommends a dialogical-epistemological harmonization model based on the maqashid sharia, which views fiqh munakahat and positive law as equal epistemological partners in an ongoing dialogue, with the protection of children, women, and legal certainty as top priorities. Implications for the reform of the KHI and the operational procedures of the KUA are also discussed.
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