# U.S. Customs and Border Protection
> **CBP** · Rule · Published 2016-04-01 · 81 FR 18748
## Document
- **Document number:** 2016-07554
- **Category:** customs-cbp
- **Sub-agency:** CBP
- **Federal Register citation:** 81 FR 18748
- **Publication date:** 2016-04-01
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/04/01/2016-07554/us-customs-and-border-protection)
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