Constitution of the Islamic Republic of Pakistan, 1973
Constitution of the Islamic Republic of Pakistan, 1973 — Article 196
196. Acting Chief Justice. At any time when.—(a) the office of Chief Justice of a High Court is vacant, or
(b)the Chief Justice of a High Court is absent or is unable to perform the functions of his office due to any other cause, the President shall appoint 1[one of the other Judges of the High Court, or may request one of the Judges of the Supreme Court], to act as Chief Justice.
This is the text of the provision as enacted. It is legal information, not legal advice, and it cannot account for the facts of your own matter. For advice on your situation, consult a verified advocate.