The IESG has approved publication of the Internet-Draft 'A Session Initiation Protocol (SIP) Event Package for Registrations' <draft-ietf-sipping-reg-event-00.txt> as a Proposed Standard. This document is the product of the Session Initiation Proposal Investigation Working Group. The IESG contact persons are Allison Mankin and Scott Bradner. Technical Summary This document defines a Session Initiation Protocol (SIP) event package for registrations. Through its REGISTER method, SIP allows a user agent to create, modify, and delete registrations. Registrations can also be altered by administrators in order to enforce policy. As a result, these registrations represent a piece of state in the network that can change dynamically. There are many cases where a user agent would like to be notified of changes in this state. This event package defines a mechanism by which those user agents can request and obtain such notifications. The mechanism has many practical uses and security considerations have been worked out with some care. Working Group Summary This specification had good consensus after this generalization of the original individual submission. Protocol Quality The specification was reviewed for the IESG by Allison Mankin. RFC Editor: Please replace each instance of: "bar.com" with "example.com" Please add to the end of the document before the Copyright Statement a copy of the RFC 2026 10.4(A) and 10.4(B) notices under the heading Intellectual Property Statement. Thank you