Hilary you raise an interesting point and I can answer it..........

A prohibited area is a place where NO ONE should be.... no exceptions

I know Larry will agree with me on that.

So far as I am aware it is the intention for the TT and presumably the Manx GP that there will be.........."restricted areas" within a prohibited area where marshals can be.
IMHO that is a complete nonsense and is an extremely dangerous thing to do...........

Larry will also find himself in agreement with that.

Effectively what it does is imply there is safe area for marshals to stand and preform their duties.................no such area exsists that can be called safe.
Very dangerous to imply or suggest that there is a safe area to be.

And once again Larry will agree with my logic