Last instance body dealing with electoral disputes
Ireland
Answer
Court of general jurisdiction (including Supreme Court)
Source
http://www.irishstatutebook.ie/1993/en/act/pub/0028/print.html
Presidential elections act, 1993
PART V
Presidential Election Petitions
57.— (8) Any party to a petition may appeal on aquestion of law to the Supreme Court against a decision of the High Court onthe petition and subject to the foregoing the decision of the High Court shallbe final and not appealable.
