Where, in accordance with the terms of the letter of credit or under any other instruction, a bank, through which an exporter receives payment for export of goods, pays any amount out of the export proceeds to the credit of any person being an agent or a representative of the foreign buyer, as commission, charges or remuneration by whatever name it may be called, the bank shall deduct or collect tax in advance at the rate of 10% (ten percent) on the commission, charges or remuneration so paid at the time of such payment.