law: Air (Prevention and Control of Pollution) Act, 1981
  10. Meetings of Board.
  (1)
  
  For the purposes of this Act, a Board shall meet at least once in every three
  
  months and shall observe such rules of procedure in regard to the transaction
  
  of business at its meetings as may be prescribed :
  Provided that
  
  if, in the opinion of the Chairman, any business of an urgent nature is to be
  
  transacted, he may convene a meeting of the Board at such time as he thinks fit
  
  for the aforesaid purpose.
  (2)
  
  Copies of the minutes of the meetings under sub-section (1) shall be forwarded
  
  to the Central Board and to the State Government concerned.