 A register of electors is prepared for each electoral division in Singapore.A person is entitled to have his or her name entered or retained in an electoral register of a certain year if on 1 January of that year he or she is a Singapore citizen who is ordinarily resident in Singapore, is not less than 21 years old, and is not subject to any disqualifications.A person not resident in Singapore but entitled to have his or her name entered or retained in a register of electors for a particular electoral division may apply to be registered as an overseas elector any time before a writ of election is issued for any election in that division.