The Chairperson and every other Member shall hold office as such for a term of five years from the date on which he enters upon his office but shall be eligible for re-appointment:

   Provided that no Chairperson or other Member shall hold office as such after he has attained,—

   (a)  in the case of Chairperson, the age of sixty-eight years; and

   (b)  in the case of any other Member, the age of sixty-five years.