19 CFR § 143.4 - Confidentiality of data.

---
identifier: "/us/cfr/t19/s143.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "19 CFR § 143.4 - Confidentiality of data."
title_number: 19
title_name: "Customs Duties"
section_number: "143.4"
section_name: "Confidentiality of data."
chapter_name: "U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY"
part_number: "143"
part_name: "SPECIAL ENTRY PROCEDURES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "19 U.S.C. 66, 1321, 1414, 1481, 1484, 1498, 1624, 1641."
regulatory_source: "T.D. 73-175, 38 FR 17463, July 2, 1973, unless otherwise noted."
cfr_part: "143"
---


# 143.4 Confidentiality of data.

The electronic data received and exchanged by a service bureau shall be considered confidential, and the service bureau shall maintain the accuracy of data received in the process of formatting and transmitting such data on behalf of a filer, and shall not disclose this data or any information connected therewith to any persons other than the filer or Customs (see § 111.24 of this chapter).