---
kind: "section"
citation: "19 C.F.R. § 159.31"
title: "19"
number: "159.31"
heading: "Rates to be used."
url: "https://uscodex.org/cfr/19/159.31"
---

# §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.


## Notes

### Authority

Authority: 19 U.S.C. 66, 1500, 1504, 1624. Subpart C also issued under 31 U.S.C. 5151. Subpart D also issued under 19 U.S.C. 1671 et seq. Subpart F also issued under 19 U.S.C. 1675c. Sections 159.4, 159.5, and 159.21 also issued under 19 U.S.C. 1315; Section 159.6 also issued under 19 U.S.C. 1321, 1505; Section 159.7 also issued under 19 U.S.C. 1557; Section 159.22 also issued under 19 U.S.C. 1507; Section 159.44 also issued under 15 U.S.C. 73, 74; Section 159.46 also issued under 19 U.S.C. 1304; Section 159.55 also issued under 19 U.S.C. 1558; Section 159.57 also issued under 19 U.S.C. 1516.

### Source

Source: T.D. 73-175, 38 FR 17482, July 2, 1973, unless otherwise noted.