Video footage shows the man lowering his shoulder as he charges into Chappelle, with the comedian staggering backwards and falling as the attacker appeared to tangle with his feet.
Smith is also not permitted to attend any other events held by the Academy of Motion Picture Arts and Sciences over the next decade.
Governors will discuss what, if any, other actions will be taken against Smith after he preemptively resigned from the group last week.
The standing ovation Smith received for his Oscar win has been heavily criticised, with accusations that Hollywood did not take the assault seriously.
Will Smith shocked the entertainment world by mounting the stage during the live broadcast of the Oscars and hitting Rock over a joke about the actor's wife.
Will Smith, in a post on Instagram, said his behavior at the televised ceremony was 'unacceptable and inexcusable.'
Ia terjadi selepas pelawak Chris Rock membuat jenaka membandingkan Jada Pinkett Smith dengan lakonan Demi Moore yang mencukur kepalanya dalam filem 'GI Jane' ada 1997.
Rock had cracked a joke comparing Jada Pinkett Smith's tightly cropped hair to Demi Moore's appearance in the film 'GI Jane' and suggesting she appear in a sequel.