How can an NRI contribute to PPF & NSC?

[Felaket]

How can an NRI contribute to PPF & NSC? As per the government Savings Promotion General Rules, 2018 read with PPF Scheme, 2019 and NSC  (VIII Issue) Scheme, 2019, if the account holder subsequently becomes an NRI during the period the account is in operation, the account may be continued till its maturity on the non-repatriation basis