Charles,
-1
It would be stretching RFC2119 beyond its breaking point to use MUST
NOT for those two.
RFC 2119 says:
Imperatives of the type defined in this memo must be used with care
and sparingly. In particular, they MUST only be used where it is
actually required for interoperation or to limit behavior which has
potential for causing harm (e.g., limiting retransmisssions)
This has not just a little potential of causing harm.
Eliot
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