I have reviewed this document as part of the Operational directorate's
ongoing effort to review all IETF documents being processed by the
IESG.  These comments were written with the intent of improving the
operational aspects of the IETF drafts. Comments that are not
addressed in last call may be included in AD reviews during the IESG
review.  Document editors and WG chairs should treat these comments
just like any other last call comments.

Status: Ready with nits

This document is Standards Track, and will update RFC6665 with a
clarification on when to use Globally Routable User Agent URIs (GRUUs)
in SIP Event Notification Framework.

nit:  The Introduction says "This document is intended to clarify a
point of implementor confusion arising from lack of clarity in
[RFC2119]", yet in the clarification section it does not explicitly
point out the RFC2119 confusion.

However, the updated text of RFC6665 is fine, including the detailed
clarificaiton portion.