Kala filed the petition against third-time MP, Sir Puka Temu.
The case went for directions before Justice Collin Makail, of the Waigani National Court, where two weeks were given to parties to sort their witness statements in preparation for trial.
Sir Puka will also be calling seven witnesses during trial.
Kala is alleging five instances of bribery against sitting MP, Sir Puka.
The Electoral Commission has been given till Oct 4 to produce form 66 A and form 66B, including the electoral roll to lawyers for the petitioner.