Jayapataka Swami:  It depends if the deities are installed or not. It is a more an issue of the person who orders you to do the worship. If you are told to do the worship because of some emergency, then the person that told you to do the service is ultimately responsible. If you do the service on your own, then if you commit any offences, then you are responsible. But if you are asked to do that, and even if you are not initiated, there is some emergency and you are asked to do that, then that person is taking the responsibility.