I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last call comments. This document defines the format for the IANA Performance Metrics Registry. This document also gives a set of guidelines for Registered Performance Metric requesters and reviewers. I agree with the statement in Security Considerations that "This draft defines a registry structure, and does not itself introduce any new security considerations for the Internet." So, the specific security consideration for the defined new Performance Metrics Registry should be described in the mandatory references and evaluated and passed by the appointed Performance Metrics Experts. In summary, there is no more security issues left for this document.