How much notice does a Bank need to give before crystalizing inoperative FC denominated deposit with no fixed maturity period?

Crystallisation of inoperative foreign currency deposits – ·         In case of foreign currency denominated deposit with no fixed maturity period, if the deposit remains inoperative for a period of three years (debit of bank charges not to be reckoned as operation), the authorised bank shall, after giving a three month notice to the depositor at his last known address as available with it, convert the deposit from the foreign currency in which it is denominated to Indian Rupee at the end of the notice period at the prevailing exchange rate ·         In case a foreign currency denominated deposit with a fixed maturity date remains inoperative for a period of three years from the date of maturity of the deposit, at the end of the third year, the authorised bank shall convert the balances lying in the foreign currency denominated deposit into Indian Rupee at the exchange rate prevailing as on that date.