Last instance body dealing with electoral disputes

Papua New Guinea

Answer

There is only one level of adjudication

Source

Organic Law onNational and Local-level Government Elections

87.REQUISITES FOR NOMINATION.

[…]

(2) Where, in relation to a nomination, objection is made by anyone,or the Electoral Commission on its own motion believes that a person who hasnominated is not qualified to be a Member of Parliament; the Electoral Commissionmay reject the nomination.