How about:
NEW:
It is not required to keep the full revision history of draft versions (e.g.,
modules contained within Internet-Drafts). That is, within a sequence of draft
versions, only the most recent revision need be recorded in the module.
However, whenever a new (i.e. changed) version is made available (e.g., via a
new version of an Internet-Draft), the revision date of that new version MUST
be updated to a date later than that of the previous version.
Jonathan
From: William Lupton
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