Kel McClanahan of National Security Archive submitted to the Central Intelligence Agency a Freedom of Information Act request for "the CIA's copy of its new regulation 32 C.F.R. 1908." This is a public document: a regulation in the Code of Federal Regulations. It is available, for example, here: 32 CFR 1908.

The CIA even has a copy of 32 CFR on its own website (though evidently not the current version!):

http://www.foia.cia.gov/32CFR.asp
http://www.foia.cia.gov/txt/32CFR.pdf

But the CIA responded to this request this way:

We did not locate any records responsive to your request... our searches were thorough and diligent, and it is highly unlikely that repeating those searches would change the result...

Read the story here:

• The CIA Cannot Find Their Own Regulations about Declassification, by Nate Jones, Unredacted, The National Security Archive (June 8, 2012).