CFR > Title 19 - Customs Duties > CHAPTER I—U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY > PART 159—LIQUIDATION OF DUTIES > SUBPART C—Conversion of Foreign Currency (§159.31 to §159.38) > 159.31—Rates to be used.

159.31—Rates to be used.

Except as otherwise specified in this subpart, no rate or rates of exchange shall be used to convert foreign currency for Customs purposes other than a proclaimed rate or certified rate or rates.