I think the wording in the CoC is what we go by, “ArduPilot is NOT certified for use in applications where ArduPilot is effectively in control of human lives”. In the case of flying vehicles, it’s very clear that a human onboard is violating this but it’s a grey area when it comes to rovers and boats especially slow moving ones.
I think if there’s a button you can easily push that takes AP out of the loop and stops the chair it could be OK.
Thanks @Yuri_Rage for pinging me.