This report presents the outcomes of the APEC project “Workshop on Hydrogen and Fuel Cell Standardization, Certification, Law, and System-Building,” held in Gyeongju, Republic of Korea, on 26 February 2025. The project aimed to enhance institutional capacity and policy coordination among APEC economies to support the development of a sustainable hydrogen economy. The report highlights key discussions from the workshop, including best practices in legal and regulatory frameworks, clean hydrogen certification systems, infrastructure development, and participation in international standards such as ISO/TC 197 and IEC/TC 105. It concludes with six key policy recommendations: (1) strengthen market-based mechanisms such as carbon pricing and clean hydrogen auctions, (2) adopt and harmonize hydrogen certification systems, (3) expand participation in international standardization efforts, (4) prioritize infrastructure development and investment, (5) enhance capacity building for institutions and professionals, and (6) promote regional pilot projects to test and deploy hydrogen technologies. These recommendations support APEC’s broader goals of decarbonization, trade facilitation, and regulatory alignment.