Northern Territory Consolidated Acts50. Informal ballot-papers
(1) A ballot-paper is informal -
(a) unless it is -
(i) printed by the Government Printer; or
(ii) created for the purposes of this Act by an officer and initialled by an officer;
(b) if the word "yes" or the word "no" is not written in the space provided on the ballot-paper and the Divisional Returning Officer is not satisfied that the elector's intention in respect of the question is clearly indicated on the ballot-paper; or
(c) if it has on it a mark or writing by which, in the opinion of the Divisional Returning Officer, the voter can be identified.
(2) If the letter "y" or a mark in the form of a tick is written or marked in the space provided on the ballot-paper, it is a clear indication that the elector's intention is to vote in favour of the question.
(3) If the letter "n" or a mark in the form of a cross is written or marked in the space provided on the ballot-paper, it is a clear indication that the elector's intention is to vote against the question.