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Equipment Control Key Codes were codes used by the Forerunners, presumably to ensure that no one else (especially the Flood) could use equipment designated for Forerunner use.[1]

As of Fleetwide Memorandum 3/5, all personnel were required to register their equipment control key codes with Forerunner Fleet Command. Compliance was not optional.[1]


  1. 1.0 1.1 Halo 3, Terminal Four