law: Specific Relief Act, 1963
  27. Where rescission may be adjudged or refused
  (1) Any person interested in a contract may sue to have it
  
  rescinded, and such rescission may be adjudged by the court in any of the
  
  following cases, namely,-
  (a) where the contract is voidable or
  
  terminable by the plaintiff;
  (b) where the contract is unlawful for causes
  
  not apparent on its face and the defendant is more to blame than the plaintiff.
  
  
  (2) Notwithstanding anything contained in sub-section (1), the
  
  court may refuse to rescind the contract-
  (a) where the plaintiff has expressly or
  
  impliedly ratified the contract; or
  (b) where, owing to the change of
  
  circumstances which has taken place since the making of the contract (not being
  
  due to any act of the defendant himself), the parties cannot be substantially
  
  restored to the position in which they stood when the contract was made; or
  (c) where third parties have, during the
  
  subsistence of the contract, acquired rights in good faith without notice and
  
  for value; or
  (d) where only a part of the contract is
  
  sought to be rescinded and such part is not severable from the rest of the contract.
  
  
  Explanation: In this section "contract", in
  
  relation to the territories to which the Transfer of Property Act, 1882, does
  
  not extend, means a contract in writing.