Taxation of interest income: cooperative banks (excluding certain primary societies) treated like banks for earlier chargeability on bad debts. The amendment makes interest on specified bad or doubtful debts received by co-operative banks (excluding primary agricultural credit societies and primary co-operative agricultural and rural development banks) chargeable to tax in the previous year in which it is credited to profit and loss or actually received, whichever is earlier, and adds statutory definitions for the referenced cooperative banking terms.