This line has been added to the description of the 755 order in the ME Guide.
“This order cannot be given by a Company or Army commander.”
This line was always present in the older rule books but seems to have been ommited in the newer guide.
It is there, now, download the updated guide from the website.
http://middleearthgames.com/down/guidev1-21.pdf
We will expect players to be aware of this now!
Cheers,
Dean
P.S. Thanks to the player that pointed it out 