13. (1) The Council shall elect from among its members a President and one or, if the Council so decides, more than one Vice-Presidents of the Institute, who shall also be the President and Vice-President or Vice-Presidents of the Council respectively and so often as the office or offices of the President or the Vice-President or Vice-Presidents becomes vacant, the Council shall choose from among its members a President, or a Vice-President or Vice-Presidents, as the case may be: Provided that on the first constitution of the Council, members of the Council nominated in this behalf by the Government shall discharge the functions of the President and the Vice-President or Vice-Presidents for the term of the first Council. (2) The President shall be the chief executive of the Council. (3) The President and the Vice-President or Vice-Presidents shall hold office for a period of one year from the date on which they are chosen but so as not to extend beyond their term of office as members of the Council, and subject to their being members of the Council at the relevant time, they shall be eligible for re-election for a total period not exceeding three consecutive years. (4) On the dissolution of the Council, the President of the Council at the time of such dissolution shall continue to hold office and discharge such administrative and other duties as may be prescribed until such time as a new President shall have been elected and shall have taken over charge of his duties.