---
kind: "unit"
title: "19"
title_heading: "Customs Duties"
key: "chI/part149"
level: "part"
label: "Part 149"
heading: "Importer Security Filing"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/19/chI-part149"
sections_count: 6
---

# Part 149 — Importer Security Filing

Title 19 C.F.R. — Customs Duties › Chapter I — U.s. Customs and Border Protection, Department of Homeland Security; Department of the Treasury

## Sections

- [§149.1. Definitions.](/cfr/19/149.1.md)
- [§149.2. Importer security filing—requirement, time of transmission, verification of information, update, withdrawal, compliance date.](/cfr/19/149.2.md)
- [§149.3. Data elements.](/cfr/19/149.3.md)
- [§149.4. Bulk and break bulk cargo.](/cfr/19/149.4.md)
- [§149.5. Eligibility to file an Importer Security Filing, authorized agents.](/cfr/19/149.5.md)
- [§149.6. Entry and entry summary documentation and Importer Security Filing submitted via a single electronic transmission.](/cfr/19/149.6.md)