Stating who may shut down production is not an AS9100 requirement.
This practice may be more common in medical companies, but it has been a while since I have worked in medical. However, nothing in the standard prohibits you from adding this to your QMS.
To me, the only time this makes sense is if you have had a problem in the past or if you want to make clear that lower level people, or non mangers, or whatever, at least in certain departments, have the ability to stop production.