law: Prevention of Cruelty to Animals Act, 1960
  14. Experiments on animals. -
  Nothing contained a this Act shall render
  
  unlawful the performance of experiments (including experiments involving
  
  operations) on animals for the purpose of advancement by new discovery of
  
  physiological knowledge or of knowledge which will be useful for saving or for
  
  prolonging life or alleviating suffering or for combating any disease, whether
  
  of human beings, animals or plants.