A high security designation in which no information was recorded. The genetic engineering experiments on Bucol-2 were subject to this classification (they were also coded "W Secret"). Only six war intelligence officers were informed of the work performed there, and theoretically Servalan as well, but as she later explained, "some war departments were a law unto themselves". The only surviving person with knowledge of what was happening on Bucol-2 was Ardus, and he was killed when he realised that Commissioner Sleer was in fact Servalan.