Portfolio investments in shares/debentures by NRIs/OCBs are permitted only through designated branches of authorised dealers preferably located at centres having stock exchanges. Authorised dealers should inform the names of such branches to Central Office of Reserve Bank and obtain approval. The Code number allotted by Reserve Bank should be quoted in all correspondence undertaken with Reserve Bank in this regard. Non-resident investors can also authorise Indian residents or stock exchange brokers as their agents in India to purchase/sell shares on their behalf under the schemes but all transactions should be routed through the designated branch of authorised dealer.