Perda bernuansa Syariah sebagai Instrumen Rekayasa Sosial Keluarga Islami:

The implementation of Regional Regulations (Perda) with sharia nuances in Indonesia shows a shift in legal functions from regulating public behavior to social engineering based on religious values, especially in forming Islamic family structures. This study aims to analyze the effectiveness of the Marhamah Gate Regional Regulation in Cianjur Regency as a social engineering instrument in the context of a pluralistic society. The method used is qualitative with a legal sociology approach, through case studies, field observations, and in-depth interviews with the community and policy makers. The results of the study show that although this regulation has the symbolic support of the majority of the Muslim community, only a small percentage understand the legal substance in its entirety. In addition, there is resistance from non-Muslim groups and progressive Muslims because they are considered exclusive and non-participatory. This study concludes that the success of local regulations as a social engineering instrument depends on the inclusivity of legislation, the internalization of contextual values, and conformity with the principle of legal pluralism. These findings make a theoretical and practical contribution to the discourse of Islamic law and public policy in multicultural social spaces.