“ Whenever any Member of the Ministry other than the President shall become unable by reason of enemy action, absence abroad, illness, or other emergency, to perform the functions of his office, the President may forthwith—and shall if the incapacity shall extend over thirty days —appoint another Deputy as Minister-Substitute to fill his place and exercise all his powers during his absence, but the name of every Substitute-Minister shall be submitted for approval to the next meeting of Dáil after his appointment if the incapacity of the original Minister then continues. ”