law: Contact Labour (Regulation and Abolition) Act, 1970
  8. Revocation of registration in certain cases
  If the registering officer is satisfied, either on a reference
  
  made to him in this behalf or otherwise, that the registration of any
  
  establishment has been obtained by misrepresentation or suppression of any
  
  material fact, or that for any other reason the registration has become useless
  
  or ineffective and, therefore requires to be revoked, the registering officer
  
  may, after giving an opportunity to the principal employer of the establishment
  
  to be heard and with the previous approval of the appropriate government,
  
  revoke the registration.