The activity aimed to assist the Karawang Regency Government in formulating a draft regulatory instrument with a sound legal basis, alignment with applicable laws and regulations, and provisions responsive to local needs and conditions concerning the procedures for collecting waste management service fees. The implementation partners were the Karawang Regency Environmental Agency (Dinas Lingkungan Hidup) and the Legal Division of the Regional Secretariat. The activity adopted a Participatory Regulatory Assistance Based on Regulatory Impact Assessment (PRA-RIA) approach to ensure the substantive adequacy, regulatory consistency, and harmonization of the proposed provisions with the relevant laws and regulations cited as their legal basis. This approach was operationalized through participatory, focused discussions involving relevant stakeholders to facilitate the review of regulatory content, identify potential implementation challenges, and strengthen the regulatory framework. The primary output of the activity was the preparation of a Draft Regent Regulation on the Procedures for Collecting Waste Management Service Fees in Karawang Regency. The Karawang Regency Environmental Agency responded positively to the implementation of the activity and subsequently proceeded with the regulatory harmonization process. As a follow-up measure, a public consultation is recommended to obtain preliminary feedback from liable fee payers and other relevant stakeholders. Such consultation is expected to identify potential barriers to compliance, improve the practical applicability of the proposed provisions, and strengthen implementation readiness.