Exchange rate determination for customs: specified currency rates govern conversion for imports and exports effective from the notification. Under statutory authority of the Customs Act, the Board fixes conversion rates for specified foreign currencies for import and export goods, providing separate rates for imported and exported goods in Schedule I (unitary currencies) and Schedule II (per 100 currencies); the notification supersedes the prior exchange rate notification except as to past actions and makes the rates in the annexed schedules operative from the stated effective date.