<s>[INST] Article 127 of Indian Constitution [/INST] Appointment of ad hoc Judges
(1) If at any time there should not be a quorum of the Judges of the Supreme Court available to hold or continue any session of the Court, the Chief Justice of India may, with the previous consent of the President and after consultation with the Chief Justice of the High Court concerned, request in writing the attendance at the sittings of the Court, as an ad hoc Judge, for such period as may be necessary, of a Judge of a High Court duly qualified for appointment as a Judge of the Supreme Court to be designated by the Chief Justice of India
(2) It shall be the duty of the Judge who has been so designated, in priority to other duties of his office, to attend the sittings of the Supreme Court at the time and for the period for which his attendance is required, and while so attending he shall have all the jurisdiction, powers and privileges, and shall discharge the duties, of a Judge of the Supreme Court"
Article 128 of Indian Constitution,"Attendance of retired Judges at sittings of the Supreme Court Notwithstanding anything in this chapter, the Chief Justice of India may at any time, with the previous consent of the president, request any person who has held the office of a Judge of the Supreme Court or of the Federal Court or who has held the office of a Judge of a High Court and is duly qualified for appointment as a Judge of the Supreme Court to sit and act as a Judge of the Supreme Court, and every such person so requested shall, while so sitting and acting, be entitled to such allowances as the President may by order determine and have all the jurisdiction, powers and privileges of, but shall not otherwise be deemed to be, a Judge of that Court: Provided that nothing in this article shall be deemed to require any such person as aforesaid to sit and act as a Judge of that Court unless he consents so to do"," </s>