Northern Territory Consolidated Regulations36. Dealing with ballot boxes
(1) The authorised officer in charge of a mobile polling place must keep ballot boxes containing ballot papers in proper custody and must ensure that, when they are not in use, they are properly secured.
(2) At the conclusion of mobile polling, the authorised officer must send the ballot boxes to the returning officer for safe custody, or make other provision as directed by the returning officer for the safe custody of the ballot boxes, pending the scrutiny.