What remedies are available in the last instance?

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

The Electoral Act 1992

Third Schedule

18. (2) Notwithstandinganything contained in this Schedule, where a case is stated under this Rule thecourt shall not determine the petition until the Supreme Court has given itsdecision and may adjourn the trial or any part thereof until such decision isgiven.