This comprehensive Guidance Note highlights the significance of the World Health Assembly (WHA) Resolution “Strengthening rehabilitation in health systems” which outlines commitments for Member States, WHO, and stakeholders to improve access to rehabilitation services. This Guidance Note has been developed to facilitate the translation of the WHA Resolution into action through local and national advocacy efforts, focusing on empowering advocates to use the resolution for policy and programmatic changes at the local and national levels. The target audience includes rehabilitation users, NGOs, disability rights organizations, professional associations, and others interested in health and development issues. It includes tools such as a template letter, FAQs, tips for effective advocacy, and a PowerPoint presentation with key messages.