Chiney et al
The situation is now clearer in my mind - there was a release of the DIN from AMP at 1400Z prior to the 1430Z announcement that was "RESTRICTED MANAGEMENT". That is why yours probably has headers and footers (as does mine in my DII mailbox).
However, the DIN on Airspace (the same detail as that released 30 minutes prior at 1400Z) is now UNCLASSIFIED.
No trip to Traitor's Gate for me just yet then, hurrah!
LJ