# U.S. Customs and Border Protection 7 documents across 7 days of the archive, 3 of them final rules. The five most recent days are below. [HTML](https://downstream.sh/daily/agency/u-s-customs-and-border-protection/) · [the long-form archive](https://downstream.sh/daily/agency/u-s-customs-and-border-protection/archive.md) · [the daily issue](https://downstream.sh/daily/index.md) ## Dates this agency has set that have not yet arrived | Date | Offset | What | Document | Agency | |---|---|---|---|---| | 2026-09-18 | +14d | Comments close | [Commercial Customs Operations Advisory Committee](https://www.federalregister.gov/documents/2026/09/03/2026-18094/commercial-customs-operations-advisory-committee) | Homeland Security Department · U.S. Customs and Border Protection | | 2026-10-20 | +46d | Comments close | [Withdrawal of International Airport Designation of Chalk Seaplane Base](https://www.federalregister.gov/documents/2026/08/21/2026-17108/withdrawal-of-international-airport-designation-of-chalk-seaplane-base) | Homeland Security Department · Energy Department · U.S. Customs and Border Protection | | 2026-10-26 | +52d | Takes effect | [Automated Commercial Environment (ACE) Electronic Export Manifest for Rail Cargo](https://www.federalregister.gov/documents/2026/08/26/2026-17390/automated-commercial-environment-ace-electronic-export-manifest-for-rail-cargo) | Homeland Security Department · U.S. Customs and Border Protection | | 2026-12-01 | +88d | Comments close | [Heightened Import Disclosures for Supply Chain Visibility](https://www.federalregister.gov/documents/2026/09/02/2026-17926/heightened-import-disclosures-for-supply-chain-visibility) | Homeland Security Department · U.S. Customs and Border Protection | ## 3 September 2026 — 1 document [the whole issue for this day](https://downstream.sh/daily/2026-09-03.md) > U.S. Customs and Border Protection published a notice that its Commercial Customs Operations Advisory Committee will hold a quarterly meeting on September 23, 2026. — via Downstream, https://downstream.sh/daily/agency/u-s-customs-and-border-protection/#s-2026-09-03 *Machine-written by `claude-haiku-4-5-20251001` from the documents below.* ### Commercial Customs Operations Advisory Committee *Notice* — Homeland Security Department · U.S. Customs and Border Protection The Commercial Customs Operations Advisory Committee (Committee) will hold its quarterly meeting on Wednesday, September 23, 2026, virtually. The meeting will be open to the public via webinar only. - **Comments close** 18 September 2026 (in 14 days) 91 FR 56658 · FR Doc. 2026-18094 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-09-03/pdf/2026-18094.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/09/03/2026-18094/commercial-customs-operations-advisory-committee) ## 2 September 2026 — 1 document [the whole issue for this day](https://downstream.sh/daily/2026-09-02.md) > U.S. Customs and Border Protection proposed amending regulations to require heightened import disclosures for supply chain visibility, with comments due December 1, 2026. — via Downstream, https://downstream.sh/daily/agency/u-s-customs-and-border-protection/#s-2026-09-02 *Machine-written by `claude-haiku-4-5-20251001` from the documents below.* ### Heightened Import Disclosures for Supply Chain Visibility *Proposed Rule* — Homeland Security Department · U.S. Customs and Border Protection U.S. Customs and Border Protection (CBP) is considering amending its regulations to give CBP greater visibility into the supply chains of goods imported into the United States. CBP is seeking comments on new requirements enhancing visibility into the parties involved in the importation of goods; integrating innovative technical solutions for the tracing of supply chains of those goods; and collecting foreign export documentation that foreign exporters are required to submit to the foreign customs authority prior to the exportation of those goods to the United States. With these proposals, CBP seeks to more effectively detect and interdict illicit importations, especially those that are illegally transshipped to evade compliance with U.S. customs and trade laws. - **Comments close** 1 December 2026 (in 88 days) 91 FR 56408 · FR Doc. 2026-17926 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-09-02/pdf/2026-17926.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/09/02/2026-17926/heightened-import-disclosures-for-supply-chain-visibility) ## 26 August 2026 — 1 document [the whole issue for this day](https://downstream.sh/daily/2026-08-26.md) > U.S. Customs and Border Protection published a rule requiring electronic transmission of rail export manifest data in the Automated Commercial Environment prior to train departure. — via Downstream, https://downstream.sh/daily/agency/u-s-customs-and-border-protection/#s-2026-08-26 *Machine-written by `claude-haiku-4-5-20251001` from the documents below.* ### Automated Commercial Environment (ACE) Electronic Export Manifest for Rail Cargo *Rule · significant under E.O. 12866* — Homeland Security Department · U.S. Customs and Border Protection U.S. Customs and Border Protection (CBP) is revising its regulations pursuant to the Trade Act of 2002 requiring the transmission of export manifest data electronically in the Automated Commercial Environment (ACE) for cargo transported by rail for any train departing the United States. This rule mandates the electronic transmission of rail export manifest information, identifies the parties eligible to transmit information, and describes the time frames prior to departure in which the information is due. This rule enables CBP to address important cargo security concerns while providing efficiencies to the trade. - **Takes effect** 26 October 2026 (in 52 days) 91 FR 55170 · FR Doc. 2026-17390 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-08-26/pdf/2026-17390.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/08/26/2026-17390/automated-commercial-environment-ace-electronic-export-manifest-for-rail-cargo) ## 25 August 2026 — 1 document [the whole issue for this day](https://downstream.sh/daily/2026-08-25.md) > U.S. Customs and Border Protection established four Customs-Enforcement Areas in South Florida, California, Puerto Rico, and Texas Gulf Coast waters. — via Downstream, https://downstream.sh/daily/agency/u-s-customs-and-border-protection/#s-2026-08-25 *Machine-written by `claude-haiku-4-5-20251001` from the documents below.* ### Establishment of Four Customs-Enforcement Areas *Rule* — Homeland Security Department · U.S. Customs and Border Protection This document sets forth the Commissioner of U.S. Customs and Border Protection's (CBP) declaration establishing four Customs- Enforcement Areas (CEA) in the near shore waters of South Florida, Central/Southern California, Puerto Rico, and the Gulf Coast of Texas. This action will further CBP efforts to interdict hovering vessels utilized for smuggling illegal cargoes into or out of the United States specifically within the CEAs. Additionally, this action authorizes customs officers and agents to enforce applicable U.S. laws, including the authorization to board vessels, examine vessels, merchandise and persons on board, bring the same into port, and pursue, seize, and arrest individuals, within the CEAs. 91 FR 54800 · FR Doc. 2026-17354 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-08-25/pdf/2026-17354.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/08/25/2026-17354/establishment-of-four-customs-enforcement-areas) ## 21 August 2026 — 1 document [the whole issue for this day](https://downstream.sh/daily/2026-08-21.md) > U.S. Customs and Border Protection proposed withdrawing the international airport designation of Miami Seaplane Base. — via Downstream, https://downstream.sh/daily/agency/u-s-customs-and-border-protection/#s-2026-08-21 *Machine-written by `claude-haiku-4-5-20251001` from the documents below.* ### Withdrawal of International Airport Designation of Chalk Seaplane Base *Proposed Rule* — Homeland Security Department · Energy Department · U.S. Customs and Border Protection U.S. Customs and Border Protection (CBP) is proposing to withdraw the international airport designation of Chalk Seaplane Base, now operating as Miami Seaplane Base. This proposal is based on evidence that the facility at this location has not been in compliance with CBP regulatory and security standards and the amount of business clearing through the airport does not justify continued maintenance of inspection equipment and personnel. The proposed change is part of CBP's continued efforts to use its personnel, facilities, and resources more efficiently and to provide better service to carriers, importers, and the public. - **Comments close** 20 October 2026 (in 46 days) 91 FR 54249 · FR Doc. 2026-17108 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-08-21/pdf/2026-17108.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/08/21/2026-17108/withdrawal-of-international-airport-designation-of-chalk-seaplane-base) ## Earlier 2 further days are in the [long-form archive](https://downstream.sh/daily/agency/u-s-customs-and-border-protection/archive.md). ## Ask an assistant instead Everything on this page is also a tool call. Add `mcp.downstream.sh` as an MCP server — no key, no account — then paste this: ``` Using the Downstream MCP server at mcp.downstream.sh, call whats_new_since with agency "U.S. Customs and Border Protection" since 2026-08-21, then summarise what changed and list every deadline it created. ``` Reaches `whats_new_since`. The response carries its own citations and states what it is missing, including which dates it has no record for. --- Every document linked here is a work of the United States government and in the public domain. The Federal Register's HTML and XML renderings are unofficial; the PDF on each item is the official text, and that is the one to cite. Counts are arithmetic over published fields, dates are printed as filed, and titles are verbatim. Where we have nothing, this says nothing rather than estimating. The one-sentence agency summaries are machine-written from those same fields and are labelled where they appear. 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