by such authorities as a travel document; is serving a sentence of imprisonment imposed by any court in or outside Singapore for an offence punishable with imprisonment of more than 12 months; or has been sentenced to death by such a court or is serving a term of imprisonment in lieu of a death sentence; is found or declared to be of unsound mind under any written law; has been convicted of a corrupt or illegal practice under the PEA or the Presidential Elections Act, or an election judge reports that they have committed a corrupt or illegal practice; is a serving member on full pay of any naval, military or air force not maintained out of moneys provided by Parliament, unless they are domiciled (permanently resident) in Singapore; or is a person whose name has been expunged from the register or the register of electors under the Presidential Elections Act, and who has not yet had their name restored to the register. A person is deemed to be ordinarily resident in Singapore on 1 January of a year if they have resided in Singapore for an aggregate of 30 days during the three years immediately preceding 1 January, even if they are not actually resident in Singapore on that date. However, such a person is not entitled to have their name entered or retained in any register of electors if: they are serving a sentence of imprisonment in any prison, jail or other place of detention outside Singapore; or there is in force against them a warrant of arrest issued by a Singapore court because they have been accused or convicted by a Singapore court of an offence against any written law punishable with more than 12 months' imprisonment. The Prime Minister may from time to time, but not later than three years after the last general election, direct that the electoral registers be revised; and may, before a general election, require the registers to be brought up to date by reference to a particular year. After registers have been prepared or updated, they are made available for public inspection to enable people to submit claims to be included in registers or to raise objections concerning the inclusion of other people in the registers. After all claims and objections have been dealt with, the registers are certified as correct. Election procedure Issuance of writ of election The election process