Ben,

A certificate not accompanied by an SCT is not CT compliant.
This seems redundant: I would've thought that in general everything in
an RFC only applies to things that are compliant with that RFC. But if
the WG wants I don't really mind either way.
I prefer the wording I suggested because it emphasizes the status of the cert relative
to this spec, rather than intimating any TLS client behavior.

OK, I get your point here, and I am happy to go either way:

a) Update TLS to require CT, or
that's not what I meant to suggest. I don't think CT is destined to become
a mandatory aspect of TLS; it's an optional feature.
b) Update the I-D to say something like "CT compliant TLS clients" or
as you use below "TLS clients claiming conformance with CT", which
presumably does not update TLS?
TLS is the definitive spec for the messages exchanged during its handshake. So the specs in Section 3.4 represent an update to TLS (1.2). That does not make support for CT mandatory, but it informs implementers of the new TLS extensions
defined here and the processing they imply.

Steve

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