In the first three years of the awards, actors were nominated as the best in their categories. At that time, all of their work during the qualifying period (as many as three films, in some cases) was listed after the award. However, during the 3rd ceremony held in 1930, only one of those films was cited in each winner's final award, even though each of the acting winners had two films following their names on the ballots. The following year, this system was replaced by the current system in which an actor is nominated for a specific performance in a single film. Starting with the 9th ceremony held in 1937, the category was officially limited to five nominations per year.