law: Employees’ State Insurance Act, 1948
  42. General provisions as to payment of contributions
  (1) No employee's contribution shall be payable by or on behalf
  
  of an employee whose average daily wages 72[during a wage period are
  
  below 73[such wages as may be prescribed by the Central
  
  Government]].
  Explanation:  The average daily wages of an employee shall
  
  be calculated 74[in such manner as may be prescribed by the Central
  
  Government.]
  (2) Contribution (both the employer's contribution and the
  
  employee's contribution) shall be payable by the principal employer for each 69[wage 
  
  p