Rustic Rebel, your link leads straight to Charles Bahme's theories. His views have not been made official in any sense of the word.

Stop and think. If his Chapter 13 were official, do you really think it would be necessary to go into the history of UFO manifestations and sensationalist sightings? Why not just say that in the event of an unexplained incident with its concurrent potential for panic, the fire fighters are to do such and so?

I remember my parents talking about the brief panic that swept certain communities in the War of the Worlds radio broadcast, (A neighbor of theirs left her home and ran through the streets screaming)so obviously the potential for harm is there. I should think that any 'manual' would address that in a more direct fashion than is given in Bahme's book.