How is the national electoral register created?

OSCE/ODIHR, Election Assessment Mission [Final Report], Slovak Republic Parliamentary Elections, 5 March 2016, accessed 30 September 2018

“Voter registration is decentralized and maintenance of the voter lists is under the responsibility of the municipal authorities. Voters are included in the voter lists based on their permanent address. The voter lists are updated continuously and are based on the municipalities’ own records and information provided by the state institutions. Municipalities may use and update the information contained in the population register that is maintained by the MoI.”