law: Indian Trusts Act, 1882 
  13. Trustee to protect title to trust-property 
  A trustee is bound to maintain and defend all such suits, and
  
  (subject to the provisions of the instrument of trust) to take such other steps
  
  as, regard being had to the nature and amount or value of the trust-property,
  
  may be reasonably requisite for the preservation of the trust-property and the
  
  assertion or protection of the title thereto.
  Illustration 
  The trust-property is immovable property which has been given to
  
  the author of the trust by an unregistered instrument. Subject to the
  
  provisions of the Indian Registration Act, 1877 (3 of 1877), the trustee's duty
  
  is to cause the instrument to be registered.