Pl.read discussions taken place in this link-
There is no exemption to declare paid holiday on the day of 'election' for those units located within a constituency. However for those who are called to work on 'night shift' there need not be paid holiday on this shift, instead the shift timing should be so adjusted that the polling timing not overlapping to shift timing.
Pl.read the circular issued by the Election Commission and the Act prov.on this attached.
26th March 2019 From India, Bangalore