Last Call Review of draft-ietf-insipid-logme-marking-11
review-ietf-insipid-logme-marking-11-secdir-lc-johansson-2018-07-09-00

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.

From the abstract: This document describes an indicator for the SIP 
protocol which can be used to mark signaling as being of interest to 
logging.

The document is clearly written and feels ready for publication from
a quality standpoint.

My only issue is in 7.4.6 - User Control of Logging: Why is the "must" 
in the first paragraph non-normative? Is it because there is no way
to prove the existence or absence of user consent? I realize this may
be a hard problem to solve but if this issue was considered and rejected 
it might be worth including a discussion about this in the document.