(2)If the office of any other judge of a High Court becomes vacant, or if any such judge is appointed to act temporarily as a chief justice, or is by reason of absence, or for any other reason, unable to perform the duties of his office, the Governor-General may in his discretion appoint a person duly qualified for appointment as a judge to act as a judge of that court, and the person so appointed shall, unless the Governor-General in his discretion thinks fit to revoke his appointment, be deemed to be a judge of that court until some person appointed by His Majesty to the vacant office has entered on. the duties thereof; or until the permanent judge has resumed his duties.