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.

The summary of the review is ready (maybe with a minor issue).

From the abstract, this document specifies the approval process for changes to the IPv6 Address Space registry. It also updates RFC 7249.

The security considerations section says only this:

"Carefully reviewed address allocation mechanisms are necessary for any form of address-based security."

I don't disagree with this, but I had 2 reactions: first, I expected this section to either state that this doc adds no new considerations over those in the doc(s) it updates (e.g. RFC 7249), or to state any new considerations. Second, the phrase "address-based security" gave me pause. We don't recommend basing security on unauthenticated addresses, do we? I wonder if it would be better not to risk leaving the reader with the wrong impression.