A:
This is undoubtedly a difficult question to answer.
It calls for a matter of practicality, not of procedure.
Not only that, but it is certainly dependent on several personalities involved.
The only suggestion I dare offer is to make whatever authority the committee is to have very explicit and delimited.
I would put the instructions in writing, perhaps after they have been word-smithed by the executive committee.
For what it's worth: Good Luck!