IMHO, the message already says that: "CQ run can only be started by full committers", i.e. "You are not a committer and don't have a permission to run a CQ". Can you please be more specific and write a full message that you think CQ should print?

This message lists several possible problems:
- I need an LGTM from a valid reviewer? Confusing b/c I TBR'd.
- I am not a full committer?
- I need an LGTM from a full committer?
- Maybe I got an LGTM, but it was not from a full committer?

I think the CQ should post (or at least highlight) the actual immediate problem. In this case, the message should read something like:

Your account, "dnj@google.com", is not a committer account, so the CQ requires an explicit LGTM from a full committer.

Then you can tack on the generic message:

CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
Committers are members of the group "project-infra-committers".
Note that this has nothing to do with OWNERS files.

Btw, this is Rietveld-only as of today, but we might end up re-using parts of LGTM verifier for Gerrit to support external contributors.

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Rietveld specific, we are using Gerrit now.