Service Tax Liability and rates

I would like to know what is service tax rate on security Agency in Delhi/Ncr & the process of returns, challan etc

Regards

Kuldeep

As i understand a) the service should be taxable. b) If advance payment recived the date of advacne wouldbe liable as" service tobe provided" also part c) If no advance then the performance of the service is important.

Therefore the services upto the date of rate change theoritically are liable at the old rate. The challenge could be to have evidecne to prove. maybe a certificate from the engineer/ architect in case of construction could be the way out. Certainly an area of possible disputes.