(2) The provisions of sub section (1) shall, so far as may be, apply to new departments or undertakings or branches set up by existing establishments 6 3 7 Provided that if an employer in relation to an existing establishment consisting of different departments or undertakings or branches (whether or not in the same industry) set up, at different periods has, before the 29th May, 1965, been paying bonus_to the employees of all such departments or undertakings or branches irrespective of the date on which such departments or undertakings or branches were set up, on the basis of the consolidated profits computed in respect of all such departments or undertakings or branches, then, such employer shall be liable to pay bonus in accordance with the provisions of this Act to the employees of all such departments or undertakings or branches (whether set up before or after that date) on the basis of consolidated profits computed as aforesaid.