X-RAY Directive

The X-RAY Directive was a United Nations Space Command order issued by ONI Section III to classify PLNB Priority Transmission XX087R-XX and PLNB Transmission XX219C-XX. Its purpose was to drastically reduce the risk of critical information falling into the hands of the Covenant.

List of appearances

 * Halo: The Fall of Reach
 * Halo: Ghosts of Onyx