law: Air (Prevention and Control of Pollution) Act, 1981
  7. Terms and Conditions of Service of Members.
  (1)
  
  Save as otherwise provided by or under this Act, a member of a State Board
  
  constituted under this Act, other than the member-secretary, shall hold office
  
  for a term of three years from the date on which his nomination is notified in
  
  the Official Gazette :
  Provided that
  
  a member shall, notwithstanding the expiration of his term, continue to hold
  
  office until his successor enters upon his office.
  (2)
  
  The term of office of a member of a State Board constituted under this Act and
  
  nominated under clause (b) or clause (e) of sub-section (2) of Section 5 shall
  
  come to an end as soon as he ceases to hold the office under the State
  
  Government or, as the case may be, the company or corporation owned, controlled
  
  or managed by the State Government, by virtue of which he was nominated.
  (3)
  
  A member of a State Board constituted under this Act, other than the
  
  member-secretary, may at any time resign his office by writing under his hand
  
  addressed, -
  (a) in the case of the Chairman, to the State Government;
  
  and
  (b) in any other case, to the Chairman, of the State
  
  Board, and the seat of the Chairman or such other member shall thereupon become
  
  vacant.
  (4)
  
  A member of a State Board constituted under this Act, other than the
  
  member-secretary, shall be deemed to have vacated his seat, if he is absent
  
  without reason, sufficient in the opinion of the State Board, from three
  
  consecutive meetings of the State Board or where he is nominated under clause
  
  (c) of sub-section (2) of Section 5, he ceases to be a member of the local
  
  authority and such vacation of seat shall, in either case, take effect from
  
  such date as the State Government may, by notification in the Official Gazette,
  
  specify.
  (5)
  
  A casual vacancy in a State Board constituted under this Act shall be filled by
  
  a fresh nomination and the person nominated to fill the vacancy shall hold office
  
  only for the remainder of the term for which the member whose place he takes
  
  was nominated.
  (6)
  
  A member of a State Board constituted under this Act shall be eligible for
  
  re-nomination [ 8 * * * 8 ]
  (7)
  
  The other terms and conditions of service of the Chairman and other members
  
  (except the member-secretary) of a State Board constituted under this Act shall
  
  be such as may be prescribed.