"...It is advised that while granting advance against the security of specially minted gold coins sold by banks, RRBs should ensure that the weight of the coin(s) does not exceed 50 grams per customer...," a RBI notification said.
Earlier, the RBI had imposed similar restrictions on commercial banks and NBFCs.
RBI also asked RRBs that the amount of loan to any customer against gold ornaments, gold jewellery and gold coins (weighing up to 50 grams) should be within the Board approved limit.
The notification has been been issued in this backdrop.
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The central bank further said that banks cannot give advances against gold Exchange Traded Funds (ETFs) and units of gold Mutual Funds.
RRBs are currently permitted to grant advances against gold ornaments and jewellery and specially minted gold coins.
RBI has also put restrictions on banks on gold imports, which has led to forex outflow and widening of the current account deficit (CAD).
CAD, which adversely affects rupee value, is likely to around 5 per cent of the GDP in 2012-13.
Gold and silver imports rose nearly 90 per cent to USD 8.4 billion in May. Cumulatively, in April-May the import of precious metal stood at USD 15.88 billion.