Lifted from this article on NASCAR.com:
https://www.nascar.com/news-media/2...d-penalty-austin-dillon-playoffs-eligibility/
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NASCAR officials ruled Wednesday that Austin Dillon’s win at Richmond Raceway would not count toward eligibility for the Cup Series Playoffs. The decision arrives
three days after the Richard Childress Racing driver
bashed his way to victory by crashing Joey Logano and Denny Hamlin on
the final lap of Sunday’s Cook Out 400.
Dillon’s penalty was the most severe of a handful of those issued after Sunday’s race, which was decided by
a chaotic last lap of overtime.
After a full review of footage and data, NASCAR officials ruled Dillon’s victory would stand, but that his automatic berth in the 16-driver postseason field would be voided for violating Section 12.3.2.1.b of the NASCAR Rule Book, which deals with playoff eligibility and states: “Race finishes must be unencumbered by violation(s) of the NASCAR Rules or other action(s) detrimental to stock car auto racing or NASCAR as determined in the sole discretion of NASCAR.”
Therefore, it appears that:
The final result of the Richmond race was determined in a hearing or meeting held no less than 24 hours after the conclusion of the event.