The region consists of four districts, Arawa, Panguna, Wakunai and Kieta, and the delay has affected over 40 000 eligible voters.
CBR Returning Officer Denise Palipal confirmed reports received from the voters that many of the names are not on the electoral roll.
Palipal and CBR police commander Spencer Aila urged all 49 polling teams not to carry out polling until the preliminary roll is printed and distributed to them.
Palipal confirmed that they will be using the preliminary roll from the 2012 elections.