14 C.F.R. § 250.2a Policy regarding denied boarding.
Title 14 - Aeronautics and Space
In the event of an oversold flight, every carrier shall ensure that the smallest practicable number of persons holding confirmed reserved space on that flight are denied boarding involuntarily.
Title 14: Aeronautics and Space
PART 250—OVERSALES
§ 250.2a Policy regarding denied boarding.