Service tax laibility in case of man power supply

Dear Sir

Greetings

I have a query regarding service tax rules for man power supply( labour contractor service for building construction work). My query  are as under.

1. when service tax applicable on man power supply( labour contractor service for building construction work) in case of individual or proprietor
2. which rate are applicable?
3. If  there any abtament for this service?

Please guide for above matter.

Thanks & Regards

Manhar Prajapati