This document is a procedural summary rather than a technical
specification, so little of the usual ARTART checklist applies to its
contents.

Nits:

The only thing that sticks out is the use of BCP14 language, which is a
pretty unconventional choice.  (At least, it seems so to this reviewer.)

§1.2 clearly states that it is used to "[s]tress importance of some
recommendations".

With this in mind, while going through the document, I come across:

  "WG chairs MUST coordinate within their own WGs and between their WG
   and other related WGs"

and felt like the BCP14 MUST was unnecessary, as the expectations
were clearly communicated even without the added emphasis.

Besides, all the remaining must/shoulds/mays are lowercase.  So it’s
unclear why the above recommendation deserves special treatment.

I would suggest removing §1.2 altogether and changing that solitary MUST
to lowercase.