Client code modification reporting requires monthly Form 3BC with annexure of modified derivative transactions by recognised association Recognised associations must furnish Form No. 3BC monthly reporting transactions where client codes were modified after registration, identifying the association and its PAN and including a soft-copy annexure listing for each derivative transaction: transaction ID, member details, original and modified client codes and client names, PANs, commodity derivative name, quantity, rate, transaction value, buy/sale indicator, date, day's aggregate value and total number of buy/sale transactions, plus a verification by the Principal Officer.