law: Factories Act, 1948 
  62. Register of adult workers 
  (1) The manager of every factory shall maintain a register of
  
  adult workers, to be available to the Inspector at all times during working
  
  hours, or when any work is being carried on in the factory, showing
  (a) the name of each adult worker in the
  
  factory;
  (b) the nature of his work;
  (c) the group, if any, in which he is
  
  included;
  (d) where his group works on shifts, the relay
  
  to which he is allotted; and
  (e) such other particulars as may be
  
  prescribed:
  PROVIDED  that, if the Inspector is of opinion that any
  
  muster roll or register maintained as part of the routine of a factory gives in
  
  respect of any or all the workers in the factory the particulars required under
  
  this sections, he may, by order in writing, direct that such muster roll or
  
  register shall to the corresponding extent be maintained in place of, and be
  
  treated as, the register of adult workers in that factory.
   7  [(1A) No adult worker shall be required or allowed to work
  
  in any factory unless his name and other particulars have been entered in the
  
  register of adult workers.]
  (2) The State Government may prescribe the form of the register
  
  of adult workers, the manner in which it shall be maintained and the period for
  
  which it shall be preserved.