<s>[INST] What are the duties of the Deputy Chairman when the Chairman's office is vacant or during any period when the Vice-President is acting as President? [/INST] When the Chairman's office is vacant, or during any period when the Vice-President is acting as President, the duties of the office shall be performed by the Deputy Chairman. If the Deputy Chairman is also not available, then the President may appoint a member of the Council of States to perform those duties. </s>