ANC elections are held every other November as part of the General Election cycle. If a Commissioner moves, resigns or dies while in office, the vacancy may be filled through a special election held at a meeting of the affected ANC.
The deadline for putting names on the November 4, 2014 ballot has passed. A list of the names of those who have qualified for the ballot is available here.
Although the deadline for ballot access has passed, it is still possible to run as a write-in candidate. More information is available here.