Conservative Party leader Colin Craig has filed papers in the High Court because he wants more air time before the election.
Mr Craig is taking action against the Electoral Commission, alleging that it acted unlawfully in how it allocated party broadcast times.
The Conservative Party's been given $61,499 and 90 seconds for its opening and closing addresses.
In an affidavit filed with the court,
the party says it is prohibited from buying more advertising with its own money. Mr Craig says it has been allocated 10th position in the opening and closing addresses.
Mr Craig says this materially disadvantages the party and believes the commission may not have the legal power to set the order.
He alleges the commission is giving voters the impression that the Conservatives are less likely to be successful than other parties.
The general election will be held on 20 September.