Commonwealth Electoral Act 1918

The validity of any election or return may be disputed by petition addressed to the Court of Disputed Returns and not otherwise.

The choice of a person to hold the place of a Senator by the Houses of Parliament of a State or the appointment of a person to hold the place of a Senator by the Governor of a State under section 15 of the Constitution shall be deemed to be an election within the meaning of this section, and the provisions of this Division shall, so far as applicable, have effect as if that choice or appointment were an election within the meaning of this Division.

The choice of a person to hold the place of a Senator for the Australian Capital Territory by the Legislative Assembly for the Australian Capital Territory or the appointment of a person to hold the place of such a Senator by the Chief Minister for the Australian Capital Territory under subsection 44(1) shall be deemed to be an election within the meaning of this section, and the provisions of this Division shall, so far as applicable, have effect as if that choice or appointment were an election within the meaning of this Division.

The choice of a person to hold the place of a Senator for the Northern Territory by the Legislative Assembly of the Northern Territory or the appointment of a person to hold the place of a Senator by the Administrator of the Northern Territory under subsection 44(2) shall be deemed to be an election within the meaning of this section, and the provisions of this Division shall, so far as applicable, have effect as if that choice or appointment were an election within the meaning of this Division.