law: The Bureau of Indian Standards Act, 2016
  14. Certification of Standard Mark of jewellers and sellers of certain specified goods or articles.-
  (1) The Central Government, after consulting the Bureau, may notify precious metal articles or other goods or articles as it may consider necessary, to be marked with a Hallmark or Standard Mark, as the case may be, in a manner as specified in sub-section (2).
  (2) The goods or articles notified in sub-section (1) may be sold through retail outlets certified by the Bureau after such goods or articles have been assessed for conformity to the relevant standard by testing and marking centre, recognised by the Bureau and marked with Hallmark or Standard Mark, as the case may be, as specified by regulations.
  (3) The Central Government may, after consulting the Bureau, by an order published in the Official Gazette, make it compulsory for the sellers of goods or article notified under sub-section (1) to be sold only through certified sales outlets fulfilling such conditions as may be determined by regulations.
  (4) The Bureau may, by an order, grant, renew, suspend or cancel certification of Standard Mark or Hallmark of a jeweller or any other seller for sale of goods or articles notified under sub-section (1) in such manner as may be determined by regulations.
  (5) The Bureau may establish, maintain and recognise testing and marking centres, including assaying and hallmarking centres, for conformity assessment and application of Standard Mark, including Hallmark, on goods or articles notified under sub-section (1), in a manner as may be specified by regulations.
  (6) No testing and marking centre or assaying and hallmarking centre, other than the recognised by the Bureau, shall with respect to goods or articles notified under sub-section (1), use, affix, emboss, engrave, print or apply in any manner the Standard Mark, including the Hallmark, or colourable imitation thereof, on any goods or article; and make any claim in relation to the use and application of a Standard Mark, including the Hallmark, through advertisements, sales promotion leaflets, price lists or the like.
  (7) Every recognised testing and marking centre, including assaying and hallmarking centre, shall use or apply Standard Mark on good or articles notified under sub-section (1), including Hallmark on precious metal articles, after accurately determining the conformity of the same in a manner as may be specified.
  (8) No recognised testing and marking centre, including assaying and hallmarking centre, shall, notwithstanding that it has been recognised under sub-section (5), use or apply in relation to any goods or article notified under sub-section (1) a Standard Mark, including Hallmark, or any colourable imitation thereof, unless such goods or article conforms to the relevant standard.