Correct framer.
We have found 2 points where it states the PIC has responsibility.
* Tokyo Convention - from when cabin doors are closed (and think till opened).
* The Australian CASA regs - from the moment the aircraft moves under its own power.
Now this gap may be covered under some other area like company SOP or it may be covered in some contract with the actual airport. It may simply not exist.
But if framers example happened on my aircraft I would like to know where I stood. I would rather it clear I was carrying out my duties as an employee, than a rouge employee acting outside his duties and therefore dismissed to easily off load bad media.