The International Society for Phylogenetic Nomenclature (ISPN) is an international, nonprofit organization with no membership restrictions. Two committees of the ISPN have responsibilities that pertain to this code: the Committee on Phylogenetic Nomenclature (CPN) and the Registration Committee. The Registration Committee is responsible for managing the registration database for phylogenetically defined names. The CPN has the responsibility and power to: ratify the first edition of this code prior to its implementation; rule on applications for suppression or conservation of names; resolve ambiguities in the provisions of this code; amend the provisions of this code; and produce future editions of this code. Applications for suppression or conservation of names, restricted emendations of definitions, and rulings on whether a proposed emendation is restricted or unrestricted must be submitted to the CPN. Decisions by the CPN regarding interpretation of rules and the status of proposed emendations as restricted or unrestricted require approval by a simple majority of the CPN.