Supreme Court of Judicature Act (Ireland) 1877

Vacancies by resignation of Judges, and effect of vacancies generally.

11. The office of any Judge of the Court of Appeal, or of any Judge of the High Court of Justice, may be vacated by resignation in writing under his hand addressed to the Lord Lieutenant, without any deed of surrender; and the office of any Judge of the said High Court shall be vacated by his being appointed to the office of ordinary Judge of the Court of Appeal. The said Courts respectively shall be deemed to be duly constituted during and notwithstanding any vacancy in the office of any Judge.