As far as I knew, you need not to write any letter to the labour officer for working on paid holiday the only thing that you need to do is double payment for employees working on paid holiday and additional compoff or triple the amount to be paid to person worked on paid holiday if want to avoid compoff.
Thanks for your reply.I have confirmed with the Office of Deputy Commissioner of Labour at Thane,Maharastra and a letter is required which we will be submitting. Also we have enclosed a Declaration from the Employees stating that the working is without any corecion or force.
This is for your information.
From India, Mumbai