Section 5(5)(vi) in The Tamil Nadu Electricity Supply Code, 2004
(vi)In the event of the consumer failing to pay to the licensee any sum that may become due for payment to the licensee on the dates fixed for payment thereof, the licensee may, in addition to and without prejudice to the other rights of the licensee, appropriate a part or whole of the security deposit and interest thereon towards the sum due from the consumer.