law: Information Technology Act, 2000
  87. Power of Central Government to make rules. –
  (1) The Central Government may, by
  
  notification in the Official Gazette and in the Electronic Gazette, make rules
  
  to carry out the provisions of this Act.
  (2) In particular, and without prejudice to
  
  the generality of the foregoing power, such rules may provide for all or any of
  
  the following matter, namely:- 
  (a) the manner in which
  
  any information or matter may be authenticated by means of digital signature
  
  under section 5;
  (b) the electronic
  
  form in which filing, issue, grant or payment shall be effected under
  
  sub-section (1) of section 6