---
kind: "unit"
title: "19"
title_heading: "Customs Duties"
key: "chI/part101"
level: "part"
label: "Part 101"
heading: "General Provisions"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/19/chI-part101"
sections_count: 11
---

# Part 101 — General Provisions

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

## Sections

- [§101.0. Scope.](/cfr/19/101.0.md)
- [§101.1. Definitions.](/cfr/19/101.1.md)
- [§101.2. Authority of Customs officers.](/cfr/19/101.2.md)
- [§101.3. Customs service ports and ports of entry.](/cfr/19/101.3.md)
- [§101.4. Entry and clearance of vessels at Customs stations.](/cfr/19/101.4.md)
- [§101.5. CBP preclearance offices in foreign countries.](/cfr/19/101.5.md)
- [§101.6. Hours of business.](/cfr/19/101.6.md)
- [§101.7. Customs seal.](/cfr/19/101.7.md)
- [§101.8. Identification cards.](/cfr/19/101.8.md)
- [§101.9. Test programs or procedures; alternate requirements.](/cfr/19/101.9.md)
- [§101.10. Centers of Excellence and Expertise.](/cfr/19/101.10.md)