law: Indian Trusts Act, 1882 
  11. Trustee to execute trust 
  The trustee is bound to fulfill the purpose of the trust, and to
  
  obey the directions of the author of the trust given at the time of its
  
  creation, except as modified by the consent of all the beneficiaries being
  
  competent to contract.
  Where the beneficiary is incompetent to contract, his consent
  
  may, for the purposes of this section, be given by a principal civil court of
  
  original jurisdiction.
  Nothing in this section shall be deemed to require a trustee to
  
  obey any direction when to do so would be impracticable, illegal or manifestly
  
  injurious to the beneficiaries.
  Explanation :  Unless a contrary intention be expressed, the
  
  purpose of a trust for the payment of debts shall be deemed to be (a) to pay
  
  only the debts of the author of the trust existing and recoverable at the date
  
  of the instrument of trust, or, when such instrument is a will, at the date of
  
  his death, and (b) in the case of debts not bearing interest, to make such
  
  payment without interest.
  Illustrations 
  (a) A, a trustee, is simply authorized to sell certain land by
  
  public auction. He cannot sell the land by private contract.
  (b) A, a trustee of certain land for X, Y and Z, is authorized
  
  to sell the land to B for a specified sum. X, Y and Z, being competent to
  
  contract, consent that A may sell the land to C for a less sum. A may sell the
  
  land accordingly.
  (c) A, a trustee for B and her children, is directed by the
  
  author of the trust to lend, on B's request, trust-property to B's husband C,
  
  on the security of his bond. C becomes insolvent and B requests A to make the
  
  loan. A may refuse to make it.