Are there any specific provisions or criteria for determining who can serve as an acting Chief Justice?
Yes, there are specific provisions for determining who can serve as an acting Chief Justice. When the office of Chief Justice of India is vacant or when the Chief Justice is, by reason of absence or otherwise, unable to perform the duties of his office, the duties of the office shall be performed by such one of the other Judges of the Court as the President may appoint for the purpose (Article 126).