Hi Mohan
Initially the labour law was very strict that female employees should never be employed between 6.p.m and 6.a.m, but now as others have rightly mentioned with the boom in BPO/Call centre industries the govt has introduced some amendments as well. The following are some of the things which you need to follow when you employee female staff after 6.00 p.m
An exception has to be availed from the Labour commissioner in a prescribed format (i think it is FORM R)along with the following attachments
1. A written statement from each and every female staff on their willingness to work after 6.00 p.m
2. Cab Facility with a security is must and the details of cab driver has to be submitted to the nearest police station. This ack from police station has to be attached
In have attached an amendment made in Karnataka Shop act addressing the minute details. I have attached the same for your reference.
hence for your query if a female staff can be employed in nights shift the answer is YES but after following all the necessary procedures, else the Laour commissioner is empowered to take serious actions.
Thanks and Regards
Dinesh