Section 4(4) in Government Savings Promotion General Rules, 2018
(4)If a depositor in a single account, or any of the depositors in a joint account, or either the guardian or a minor depositor or a depositor who is a person of unsound mind, as the case may be, ceases to be a citizen of India, the account shall be closed or deemed to be closed from the last day of the month preceding the month in which the depositor ceases to be a citizen of India:
