This Handbook aims to inform and guide Major Groups and Stakeholders by presenting in detail the currently applied rules, mechanisms and practices for Major Groups and Stakeholders engagement in UNEP’s work. It is based on the Rules of Procedure of the United Nations Environment Assembly (UNEA) of the United Nations Environment Programme (UNEP) It contains ten sections: 1: The United Nations Environment Assembly (UNEA) and Its Subsidiary Organs; 2: Engagement Approach; 3: Accreditation; 4: Participation in Agenda-Setting and Decision-Making Processes; 5: Access to Information; 6: Major Groups and Stakeholders Body – Spaces and Roles; 7: Expert Input and Advice, and Partnerships for Implementation; 8: Funding for Stakeholder Engagement at UNEP; 9: Code of Conduct at Meetings Hosted by the UN; and 10: UNEP’s Civil Society Unit.