law: Factories Act, 1948 
  66. Further restrictions on employment of women 
  (1) The provisions of this Chapter shall, in their application
  
  to women in factories, be supplemented by the following further restrictions,
  
  namely:
  (a) no exemption from the provisions of
  
  section 54 may be granted in respect of any woman;
  (b) no woman shall be 86[required
  
  or allowed to work in any factory] except between the hours of 6 A.M. and 7
  
  P.M.:
  PROVIDED  that the State Government may, by
  
  notification in the Official Gazette, in respect of 87[any factory
  
  or group or class or description of factories,] vary the limits laid down in
  
  clause (b), but so that no such variation shall authorize the employment of any
  
  woman between the hours of 10 P.M. and 5 A.M.
   3  [(c) there shall be no change of shifts
  
  except after a weekly holiday or any other holiday.]
  (2) The State Government may make rules providing for the
  
  exemption from the restrictions set out in sub-section (1), to such extent and
  
  subject to such conditions as it may prescribe, of women working in fish-curing
  
  or fish-canning factories, where the employment of women beyond the hours
  
  specified in the said restrictions is necessary to prevent damage to or
  
  deterioration in, any raw material.
  (3) The rules made under sub-section (2) shall remain in force
  
  for not more than three years at a time.