law: Indian Easements Act, 1882
  47. Extinction by non-enjoyment 
  A continuous easement is extinguished when it totally ceases to
  
  be enjoyed as such for an unbroken period of twenty years.
  A discontinuous easement is extinguished when, for a like
  
  period, it has not been enjoyed as such.
  Such period shall be reckoned, in the case of a continuous
  
  easement, from the day on which its enjoyment was obstructed by the servant
  
  owner, or rendered impossible by the dominant owner; and, in the case of a
  
  discontinuous easement, from the day on which it was last enjoyed by any person
  
  as dominant owner:
  PROVIDED that if, in the case of a discontinuous
  
  easement, the dominant owner, within such period, registers, under the Indian
  
  Registration Act, 1877 (3 of 1877), a declaration of his intention to retain
  
  such easement, it shall not be extinguished until a period of twenty years has
  
  elapsed from the date of the registration.
  Where an easement can be legally enjoyed only at a certain place,
  
  or at certain times, or between certain hours, or for a particular purpose, its
  
  enjoyment during the said period at another place, or at other items, or
  
  between other hours, or for another purpose, does not prevent its extinction
  
  under this section.
  The circumstance that, during the said period no one was in
  
  possession of the servant heritage, or that the easement could not be enjoyed,
  
  or that a right accessory thereto was enjoyed, or that dominant owner was not
  
  aware of its existence, or that he enjoyed it in ignorance of his right to do
  
  so, does not prevent its extinction under this section.
  An easement is not extinguished under this section-
  (a) where the cessation is in pursuance of a contract between
  
  the dominant and servant owners;
  (b) where the dominant heritage is held in co-ownership, and one
  
  of the co-owners enjoys the easement within the said period; or
  (c) where the easement is necessary easement.
  Where several heritages are respectively subject to rights of
  
  way for the benefit of a single heritage, and the ways are continuous, such
  
  rights shall, for the purposes of this section, be deemed to be a single
  
  easement.
  Illustration
  A has, as annexed to his house, rights of way from the high road
  
  thither over the heritages X and Z and intervening heritage Y. Before the
  
  twenty years expire, A exercises his right of way over X. His rights of way
  
  over Y and Z are not extinguished.