You can withdraw within 24 hours after the close of nominations (before 12:00noon on September 24, 2013). Your notice of withdrawal must be submitted in person, in writing, to the Returning Officer at the local jurisdiction. Faxed notices of withdrawal are NOT accepted. Your nomination cannot be withdrawn after the 24-hour deadline has passed, and your name will appear on the ballot.
However, you can only withdraw your nomination if the number of remaining candidates meets the positions in the race. For example, if you are running for Councillor in a local jurisdiction with 6 seats and there are only six nominated candidates, no candidate may withdraw. (Section 32, Local Authorities Election Act).