law: The Bureau of Indian Standards Act, 2016
  15. Prohibition to import, sell, exhibit, etc.-
  (1) No person shall import, distribute, sell, store or exhibit for sale, any goods or article under sub-section (1) of section 14, except under certification from the Bureau.
   (2) No person, other than that certified by the Bureau, shall sell or display or offer to sell goods or articles that are notified under sub-section (3) of section 14 and marked with the Standard Mark, including Hallmark and claim in relation to the Standard Mark, including Hallmark, through advertisements, sales promotion leaflets, price lists or the like.
  (3) No certified jeweller or seller shall sell or display or offer to sell any notified goods or articles, notwithstanding that he has been granted certification, with the Standard Mark, including Hallmark, or any colourable imitation thereof, unless such goods or article is marked with a Standard Mark or Hallmark, in a manner as may be specified by regulations, and unless such goods or article conforms to the relevant standard.