Advance on Docket (AOD) - TISTATechnologies/caseflow GitHub Wiki
Some appeals are marked AOD, or Advance on Docket.
AOD cases represent the highest-priority cases. Veterans can be "advanced on the docket" due to age, financial hardship, terminal illness, etc., and therefore skip ahead in the line.
AOD status is automatic when a Veteran reaches 75 years of age, while other reasons require that the Veteran file a motion.
The logic for whether an appeal is considered AOD is mostly encapsulated in Appeal#aod? (which also looks for AdvanceOnDocketMotions, and in LegacyAppeal#aod? (which ultimately comes from VACOLS through AppealRepository).