Cbec and rbi rates on customs

The purpose for which the rates are notified are different. RBI rates changes every day where as cbec notifies the rates twice in a month considering the avg of fluctuations. Accounting is done always on RBI rates at the time of remitence or payment. Cbec notification is purely for calculation of the invoice price and levy of customs duty there on. You account sales or purchase on basis of cbec rates which actually is the cost. While receiving or making payment party is debited or credited and the differential amount is taken to p and l. Hope it is clear

Can we use RBI Rate also on invoice as per date?