If electoral register is created by the EMB, what type of technology used for collecting registration data?

The provisions for the registration of electors are set out in Part 5 of the Electoral Act 1993 http://www.legislation.govt.nz/act/public/1993/0087/latest/DLM308817.html

?

Electoral roll records are held in a centralised national database accessed online and updated in real-time by Registrars of Electors and their staff who can add, delete or amend voter registrations. An online service to update a voter?s registration details can be accessed by registered electors who have signed up to use this service and who have a government authorised login.

It is planned to introduce a full online voter registration service in June 2014 for voters who have a government verified identity and authorised login.