Gold Meritorious Patron
To me the documents are ubdoubtedly genuine. They're not a Manual as such but rather a collection of document seized in the FBI raids on US Churches. They were most probably in someone's Hat Pack (the Drills included would seem to indicate this).
It certainly reads as authentic USGO B1 ie. Bureau/Branch 1 of the Guardian Office = Intelligence Bureau/Branch (later renamed "Information" so it wouldn't scare the kiddies so much).
There is an actual Manual in the archives over on Xenu.net.