From Halopedia, the Halo wiki
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 (First appearance)
- Halo: Ghosts of Onyx
- ^ Halo: The Fall of Reach, page 229
- ^ Halo Waypoint: Canon Fodder 2/26/2015: Issue 13 Second to None