law: Building and Other Construction Workers (Regulation of Employment and Conditions of Service) Act, 1996 
  
  10.Effect of non-registration.-
  No employer of an establishment to which this
  
  Act applies shall,----
  (a) in the case of an establishment required to be registered under section 7,
  
  but which has not been registered under that section;
  (b) in the case of an establishment the registration in respect of which has
  
  been revoked under section 8 and no appeal has been preferred against such
  
  order of revocation under section 9 within the period prescribed for the
  
  preferring of such appeal or where an appeal has been so preferred, such appeal
  
  has been dismissed.
  Employ building workers in the establishment after the expiry of the period
  
  referred to in clause (a) or clause (b) of sub-section (1) of section 7, or
  
  after the revocation of registration under section 8 or after the expiry of the
  
  period for preferring an appeal under section 9 or after the dismissal of the
  
  appeal, as the case may be.