This document has been developed to provide an overview of the rules and procedures in place in other relevant science-policy institutions. It covers the rules of procedures under which the decision-making bodies of these platforms operate, the procedures in place for the completion of their functions as well as their financial rules. This document is intended to complement the comparative analysis of existing assessment structures (UNEP/SPP-CWP/OEWG.1/(II)/INF/5). Member States may find it helpful to consult this compendium when considering options for rules and procedures for the new panel, and either use some of these as examples, or highlight additional relevant examples not included in this document.