The High Court is to hear a bid by Clive Palmer to ban the Australian Electoral Commission publishing polling data, including two-candidate preferred counts, until booths close nationwide on May 18.
The two candidates listed are almost inevitably Liberal-Nationals or Labor, and not candidates from minor parties or independents.
Mr Palmer, who is contesting a Senate seat for Queensland and running a team of United Australia Party candidates, wants the court to prevent the AEC publishing data until 9.30pm (AEST), after polls in the Cocos (Keeling) Islands, Western Australia and the Northern Territory have also closed.
He claims the process gives the appearance of the AEC, an independent umpire, favouring major party candidates and could misinform voters about the true state of the count.
The hearing is set for 2.15pm (AEST) on Monday in Canberra.