166. (1) If the office of Chief Justice of a High Court becomes vacant, if any is by of absence, or for any other reason, unable to perform the duties of his office, those duties shall until some person appointed by the President to the vacant office has entered on the duties thereof, or until the Chief Justice has resumed his duties, as the case may be, be performed by such one of the other judges of the court as the President may appoint for the purpose.

(2) If the 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 President may 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 President thinks fit to revoke his appointment, be deemed to be a judge of that court until some person appointed by the President to the vacant office has entered on the duties thereof or until the permanent judge has resumed his duties.

(3) If by reason of any temporary increase in the business of any High Court or by reason of arrears of work in any such court, it appears to the President that the number of the judges of the court should be for the time being increased, the President may, subject to the foregoing provisions of this chapter with respect to the maximum number of judges, appoint persons duly qualified for appointment as judges to be additional judges of the court for such period not exceeding two years as he may specify.