Reportedly, OU's appeal for Green-Beckham will rest on the "run-off" rule, which calls for immediate eligibility in cases where the transferring player has no control over his cause of exit. That argument, according to newsok.com, would contend for the waiver because Green-Beckham wasn't ultimately charged in the incident.
http://www.nfl.com/news/story/0ap30...port-ncaa-received-dorial-greenbeckham-appeal