There are three jury districts in South Australia – Adelaide, Port Augusta and Mount Gambier. Jurors are chosen by a random computer selection from the electoral rolls which constitute the jury districts. Any person aged between 18 years and 70 years and enrolled on the electoral rolls for the jury districts is qualified and liable to be summonsed to attend for jury service. If a summonsed juror is over the age of 70, they may request excusal based on their age if they wish.
The Juries Act provides that jurors must be chosen for service by a random ballot. People are unable to volunteer to do jury duty.