Section 5(5)(iv) in The Tamil Nadu Electricity Supply Code, 2004
(iv)If available deposit is less than the revised security deposit, the balance shall be collected as additional security deposit either through a separate notice or by a distinct entry in the consumer meter card for LT services. Thirty days notice period shall be allowed for the payment. If the payment is not received within the above period of thirty days, the service is liable for dis-connection.