Marking
SCI control system markings are placed immediately after the classification level markings in a banner line or portion marking. Sometimes, especially on older documents, they are stamped. The following banner line and portion marking describe a top secret document containing information from the notional SI-GAMMA 1234 subcompartment, the notional SI-MANSION compartment, and the notional TALENT KEYHOLE-LANTERN compartment:
TOP SECRET//SI-GAMMA 1234-MANSION/TALENT KEYHOLE-LANTERN//NOFORN
(TS//SI-G 1234-M/TK-L//NF)
Older documents were marked with HANDLE VIA xxxx CONTROL CHANNELS (or "HVxCC"), HANDLE VIA xxxx CHANNELS ONLY (or "HVxCO"), or HANDLE VIA xxxx CHANNELS JOINTLY (or "HVxCJ"), but this requirement was rescinded in 2006. For example, COMINT documents were marked as HANDLE VIA COMINT CHANNELS ONLY. This marking led to the use of the caveat CCO (COMINT Channels Only) in portion markings, but CCO is also obsolete.
Read more about this topic: Sensitive Compartmented Information
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