to your point on form of board resolutions accepting IETF procedures:
Resolution 96-11, which accepted the POISED documents, read:
RESOLVED, that the Board accept the POISED Documents: The Organisations
Involved in the IETF Standards Process, IAB and IESG Selection,
Confirmation, and Recall Process: Operation of the Nominating and Recall
Committees, and The Internet Standards Process -- Revision 3, and accept
the responsibilities of ISOC as described in these documents.
I think the last sentence fits with what you are looking for.
I couldn't find an example of a resolution that accepts an IETF procedure
BCP without such a clause, but I probably missed it... an amendment to the
BCP that says ".... and has been affirmed by a resolution of the ISOC Board
of Trustees that accepts ISOC's responsibilities as described in this
document" would appear to be consistent with previous practice.
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