Tds on nro saving account ?

TDS @ 30.9% has been deducted for the first time in NRO saving a/c of one Govt. Bank.

1) Whether any new guideline issued ?

2) Since interest income may not be taxable as per rule so refund will be required to take from Income tax deptt. after return filing. Is there any form like 15 G/H to stop deduction of TDS. 

Thanks

A K Jain