How is the national electoral register created?

Pakistan, Election Act No. XXXIII of 2017, ‘Chapter 4: Electoral Rolls’, accessed 29 August 2018

The National Database and Registration Authority transmits relevant data of every fresh National Identity Card issued by it to the Commission for registration of the card-holder as a voter in the electoral roll of the electoral area in which his permanent or temporary address is located and the Commission forwards the data to the Registration Officer concerned who shall take steps for enrolment or correction in the relevant electoral roll.