DCS Regulation BDX-008814530
From Halopedia, the Halo wiki
DCS Regulation BDX-008814530 is a regulation set forth by the UNSC Department of Commercial Shipping. In case of a crew medical emergency a ship would send out an S.O.S. requesting for "immediate medical assistance" from any available ships. 
Jilan al-Cygni along with Staff Sergeants Avery Johnson and Nolan Byrne used this regulation to send out a false S.O.S from Bulk Discount, to lure Minor Transgression into a trap. The Shipmistress of Minor Transgression, Chur'R-Yar, thinking it was another ship with Forerunner relics aboard, fell for the trap. Thinking the ship belonged to Insurrectionists, al-Cygni, Johnson, and Byrne were surprised to find out the ship belonged to aliens, that, they would later learn belonged to the Covenant Empire.
List of appearances
- Halo: Contact Harvest (First appearance)
- Halo: Contact Harvest, Chapter 11, page 175