(1)  If the Chairperson or, as the case may be, a Member,—

   (a)  becomes subject to any of the disqualifications mentioned in section 7; or

   (b)  tenders his resignation under sub-section (2) of section 5, his seat shall thereupon become vacant.

   (2)  If a casual vacancy occurs in the office of the Chairperson or a Member, whether by reason of his death, resignation or otherwise, such vacancy shall be filled within a period of ninety days by making afresh appointment in accordance with the provisions of section 4and the person so appointed shall hold office for the remainder of the term of office for which the Chairperson, or a Member, as the case may be, in whose place he is so appointed would have held that office.