To winnow the entries down to the 15 semi-finalists that will be announced on December 17, the academy is sending monthly packages of the newly eligible documentary feature screeners to all 400 or so members of the documentary branch. While all members are encouraged to watch as many of these as they can, one-fifth of the voters are assigned each title. In late November, each branch member will submit a preferential ballot listing their top 15 choices.
See 2019 Oscars: Foreign-language film entries from A (Afghanistan) to Y (Yemen)
All of these ballots will be collated to determine the 15 semi-finalists. Branch members will then be