Re: A common misconeption
Top Secret is about how the information is handled: what IT security, how thoroughly checked people need to be, which rooms it can be in, which locks, and so on. There are, or were, special handling instructions beyond those but I think most of those have been absorbed into one of the standard classifications, at least outside SIS etc.
"Eyes Only" is about who can be told, on top of whatever restrictions apply to you telling people in general.
Biting the hand that feeds IT
