(1) The Deputy Presidents have seniority as Deputy Presidents according to the dates of their first appointment to the Tribunal, or, if 2 or more Deputy Presidents were appointed on the same day, according to the precedence assigned to them in their instruments of appointment.
(2) At any time when only one person is holding office as a Deputy President, any reference in this Part to 'the senior Deputy President' is to be taken to be a reference to the Deputy President.