Election Commission deputy chairman Tan Sri Othman Mahmood on Monday announced that the polling for the Balakong by-election will be on Sept 8 while nomination is on Aug 18. Early voting will be held on Sept 4. The Balakong state seat fell vacant following the death of its assemblyman Ng Tien Chee in an accident at KM11.7 of the Grand Saga Expressway on July 20.