law: Limitation Act, 1963 
  25. Acquisition of easement by prescription – 
  (1) Where the access and use of light or air to and for any
  
  building have been peaceable enjoyed there with as an easement, and as of
  
  right, without interruption and for twenty years, and where any way or
  
  watercourse or the use of any water or any other easement (whether affirmative
  
  or negative) has been peaceably and openly enjoyed by any person claiming title
  
  thereto as an easement and as of right without interruption and for twenty
  
  years, the right to such access and use of light or air, way, watercourse, use
  
  of other easement shall be absolute and indefeasible.
  (2) Each of the said periods of twenty years shall be taken to
  
  be a period ending within two years next before the institution of the suit
  
  wherein claim to which such period relates is contested.
  (3) Where property over which a right is claimed under
  
  sub-section (1) belongs to the Government that sub-section shall be read as if
  
  for the words "twenty years" the words "thirty years" were
  
  substituted.
  Explanation -  Nothing is an interruption within the meaning
  
  of the section, unless where there is an actual discontinuance of the
  
  possession or enjoyment by reason of an obstruction by the act of some person
  
  other than the claimant and unless such obstruction is submitted to or acquiesced
  
  in for one year after the claimant has notice thereof and of the person making
  
  or authorizing the same to be made.