How is the national electoral register created?

Taiwan, Civil Servants Election and Recall Act, [official English translation] (last amended 2018.05.09), accessed 25 October 2018

Article 20. The list of electors shall be compiled by the township (city / district) government agency of household registration according to the household registration data and include such information as S/N, name, gender, date of birth and address of domicile. All those who have their household data registered by the twentieth day before the polling day and thus enjoy the qualification of elector according to relevant provisions shall be listed, and the electors who migrate after the twentieth day before the polling day shall exercise their rights of suffrage at the original location of domicile all the same.

The identification of the indigenous electors in the list of indigenous electors shall conform to the household registration data; the list of indigenous electors shall be compiled by the corresponding agency of household registration in accordance with the provision of the preceding Paragraph.

After being compiled, the list of electors shall only be used by the election commissions, township (city / district) offices and government agencies of household registration according to the provisions of this Act, and may not be provided to any of the external parties by transcription, copying, photography, recording or any other means.