Number of levels of adjudication

http://www.irishstatutebook.ie/1992/en/act/pub/0023/print.html#sec21

The Electoral Act 1992

PART X

Nominations

52.—(1) The returning officer shall rule on the validity of each nominationpaper within one hour after its delivery to him and may rule that it is invalidif, but only if, he considers that it is not properly made out or signed.

[…]

(5) When the returning officer has ruled on thevalidity of a nomination paper, he shall put a note of his decision on thenomination paper and shall sign the note. If he rules that the paper isinvalid, he shall include a statement of his reasons. His decision under this section shall be finalsubject only to reversal on a petition questioning the election.

PART XXI

D?il Election Petitions

132.—(1) A D?il election may, and may only, be questionedby a petition to the High Court.

[…]

— (6) Any party to a petition may appeal on a questionof law to the Supreme Court against a decision of the High Court on thepetition and subject to the foregoing the decision of the High Court shall befinal and not appealable.

Third Schedule

18. (1) At any stageof the trial of a petition the court may, if it so thinks proper, on its ownmotion or on the application of any party to the petition, state a case for theopinion of the Supreme Court on any question of law arising at the trial.