law: Contact Labour (Regulation and Abolition) Act, 1970
  7. Registration of certain establishments
  (1) Every principal employer of an establishment to which this Act
  
  applies shall, within such period as the appropriate government may, by
  
  notification in the Official Gazette, fix in this behalf with respect to
  
  establishment generally or with respect to any class of them, make an
  
  application to the registering officer in the prescribed manner for
  
  registration of the establishment:
  PROVIDED that the registering officer may entertain any
  
  such application for registration after expiry of the period fixed in this
  
  behalf, if the registering officer is satisfied that the applicant was
  
  prevented by sufficient cause from making the application in time.
  (2) If the application for registration is complete in all
  
  respects, the registering officer shall register the establishment and issue to
  
  the principal employer of the establishment a certificate of registration
  
  containing such particulars as may be prescribed.