law: Indian Trusts Act, 1882 
  16. Conversion of perishable property
  Where the trust is created for the benefit of several persons in
  
  succession, and the trust property is of a wasting nature or a future or
  
  reversionary interest, the trustee is bound, unless an intention to the
  
  contrary may be inferred from the instrument of trust, to convert the property
  
  into property of a permanent and immediately profitable character.
  Illustrations 
  (a) A bequeaths to B all his property in trust for C during his
  
  life, and on his death for D, and on D's death for E. A's property consists of
  
  three leasehold houses, and there is nothing in A's will to show that he
  
  intended the houses to be enjoyed in specie. B should sell the houses, and
  
  invest the proceeds in accordance with section 20.
  (b) A bequeaths to B his three leasehold houses in Calcutta and
  
  all the furniture therein in trust for C during his life, and on his death for
  
  D, and on D's death for E. Here an intention that the houses and furniture
  
  should be enjoyed in specie appears clearly, and B should not sell them.