Look at the bottom right. EO 13526 3.5(c) and EO 13526 3.3(b)(1)
Sec. 3.3 Automatic Declassification.
(a) Subject to paragraphs (b)–(d) and (g)–(j) of this section, all classified records that (1) are more than 25 years old and (2) have been determined to have permanent historical value under title 44, United States Code, shall be automatically declassified whether or not the records have been reviewed. All classified records shall be automatically declassified on December 31 of the year that is 25 years from the date of origin, except as provided in paragraphs (b)–(d) and (g)–(j) of this section. If the date of origin of an individual record cannot be readily determined, the date of original classification shall be used instead.
(b) An agency head may exempt from automatic declassification under paragraph (a) of this section specific information, the release of which should clearly and demonstrably be expected to:
(1) reveal the identity of a confidential human source, a human intelligence source, a relationship with an intelligence or security service of a foreign government or international organization, or a nonhuman intelligence source; or impair the effectiveness of an intelligence method currently in use, available for use, or under development;
If I read this part right, it says that ALL classified docs older than 25 yrs and determined to have historical value, shall AUTOMATICALLY be declassified whether reviewed or not. THAT is very interesting. It then goes on to part (b)(1) which says, an agency head may exempt from declassification but is expected to: "(1) reveal the identity of a confidential human source, a human intelligence source, a relationship with an intelligence or security service of a foreign government or international organization, or a nonhuman intelligence source; or impair the effectiveness of an intelligence method CURRENTLY in use, available for use, or under development;"
That, "currently," might have some interesting implications.
Then we have EO 13526 (c):
"Sec. 3.5. Mandatory Declassification Review.
(a) Except as provided in paragraph (b) of this section, all information classified under this order or predecessor orders shall be subject to a review for declassification by the originating agency if:"
and now the (c) part:
"(c) Agencies conducting a mandatory review for declassification shall declassify information that no longer meets the standards for classification under this order. They shall release this information unless withholding is otherwise authorized and warranted under applicable law."
It sounds like unless someone has a good reason to keep something classified and can prove it, anything over 25 yrs gets an automatic declassification.
Seems to me, it would be interesting to find out WHO might be trying to prevent this info from being declassified against the law as written here.