Enrolment of eligible voters is compulsory. Voters must notify the AEC within 8 weeks of a change of address or after turning 18. The electoral rolls are closed for new enrolments or update of details about a week after the issue of writs for election.[77] Enrolment is optional for 16- or 17-year-olds, but they cannot vote until they turn 18,[78] and persons who have applied for Australian citizenship may also apply for provisional enrolment which takes effect on the granting of citizenship.[79] A total of 17,228,900 people were enrolled to vote in the election, which meant that 96.8% of all eligible Australians were enrolled on the electoral roll.[80]