Hoax, and frequently debunked (this is why I asked if you'd searched for authentication)
There's a lot of sites (including some UFO sites) that talk about the problems with this that led it to be identified as a hoax. Here's a link to a
site with a nice discussion of the points:
Doesn't follow standard military formatting
Majestic-12, Majectic 12 Group, Majic 12, MJ-12 are not defined and seem to be interchangeable. The military has ONE name and ONE official acronym
for services. Not four.
No glossary (standard military practice is to have one)
When acronyms first used, they are not defined (no manual would do this slipshod practice)
Begins with "Chapter 2". One wonders if the hoaxer read many books.
A couple of real howlers to people familiar with military manuals: Para 6c, Chapter 2. Appendix II is said to contain a list of Majectic--12
personnel. Note that nowhere is a clear chain of command and support relationships discussed for the MJ-12 teams (BIG faux pas!!!)
Par 12c, Chapter 3. "down satellites" is listed as one of the cover stories. Since the mission stated in paragraph 12, is a press blackout,
telling the press that it's a "downed satellite" will not work. A story from the military that they were recovering a downed satellite in 1954
would have caused HUGE sensation.
"Cover story" does not equal "Press blackout."
The "perimeter" setup is all wrong (see webpage for the discussion of how the military really does it.)
No minimum standards for common military procedures are set (as they would be set in any military manual), no support staffing is given, no chains of
command are given.
And I just loved this one: 49 Although the front of the manual apparently has an Army seal, chapter 6 talks about squadrons. Squadrons aren't an
Army unit. They're an Air Force unit. ANYone who's been in the military for more than 10 minutes knows that.
Of course, a hoaxer wouldn't be aware of any of that. Further research shows that after these rebuttals were made, another "version" of the
"manual" showed up that "corrected" some of the discrepancies (a "revisions" page was suddenly found as well as a "change control" page.)
Because of these and other problems, most members of the UFO community proclaimed them as hoaxes -- along with the entire MJ-12/Majestic file.