law: Factories Act, 1948 
  61. Notice of periods of work for adults 
  (1) There shall be displayed and correctly maintained in every
  
  factory in accordance with the provisions of sub-section (2) of section 108, a
  
  notice of periods of work for adults, showing clearly for every day the periods
  
  during which adult workers may be required to work.
  (2) The periods shown in the notice required by sub-section (1)
  
  shall be fixed beforehand in accordance with the following provisions of this
  
  section, and shall be such that workers working for those periods would not be
  
  working in contravention of any of the provisions of sections 51, 52, 54,
  
  78[55, 56 and 58.].
  (3) Where all the adult workers in a factory are required to
  
  work during the same, periods, the manager of the factory shall fix those
  
  periods for such workers generally.
  (4) Where all the adult workers in a factory are not required to
  
  work during the same periods, the manager of the factory shall classify them
  
  into groups according to the nature of their work indicating the number of
  
  workers in each group.
  (5) For each group which is not required to work on a system of
  
  shifts, the manager of the factory shall fix the periods during which the group
  
  may be required to work.
  (6) Where any group is required to work on a system of shifts
  
  and the relays are not to be subject to predetermined periodical changes of
  
  shifts, the manager of the factory shall fix the periods during which each
  
  relay of the group may be required to work.
  (7) Where any group is to work on a system of shifts and the
  
  relays are to be subject to predetermined periodical changes of shifts, the
  
  manager of the factory shall draw up a scheme of shifts where under the periods
  
  during which any relay of the group may be required to work and the relay which
  
  will be working at any time of the day shall be known for any day.
  (8) The State Government may prescribe forms of the notice
  
  required by sub-section (1) and the manner in which it shall be maintained.
  (9) In the case of a factory beginning work after the
  
  commencement of this Act, a copy of the notice referred to in sub-section (1)
  
  shall be sent in duplicate to the Inspector before the day on which work is
  
  begun in the factory.
  (10) Any proposed change in the system of work in any factory
  
  which will necessitate a change in the notice referred to in sub-section (1)
  
  shall be notified to the Inspector in duplicate before the change is made, and
  
  except with the previous sanction of the Inspector, no such change shall be
  
  made until one week has elapsed since the last change.