How is the national electoral register created?

Parliamentary Election Law 2017

“The Directorate General of Personal Status (DGPS) prepares voter lists for each constituency based on civil status records containing the voters who had been registered in that constituency for one year before the annual voter update period beginning on October 20 (Article 26). The Criminal Record Department and the courts have to provide the DGPS with lists containing the names of those ineligible to vote under Article 4 (Articles 29, 30).”