law: Indian Forest Act, 1927
  9.  Extinction
  
  of rights  –
  Rights in respect of which no claim has been
  
  preferred under section 6, and of the existence of which no knowledge has been
  
  acquired by inquiry under section 7, shall be extinguished, unless before the
  
  notification under section 20 is published, the person claiming them satisfies
  
  the Forest Settlement-officer that he had sufficient cause for not preferring
  
  such claim within the period fixed under section 6.