Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Homeland Security Coast Guard 33 CFR Part 165 [Docket Number USCG-2025-0366] RIN 1625-AA87 AGENCY: Coast Guard, Department of Homeland Security. ACTION: Final rule. SUMMARY: The Coast Guard is revising the permanent security zone of the Coast Guard Base San Juan in San Juan, Puerto Rico. This security zone is necessary to protect the public and the Coast Guard base from potential subversive acts. This rulemaking prohibits entry of vessels or persons into this security zone extending 200 feet seaward from the water's edge of the Coast Guard Base San Juan unless specifically authorized by the Captain of the Port, Sector San Juan or their designated representative. DATES: This rule is effective January 5, 2026. ADDRESSES: To view available documents go to https://www.regulations.gov and search for USCG-2025-0366. FOR FURTHER INFORMATION CONTACT: If you have questions about this rule, contact Lieutenant Commander Rachel E. Thomas, Sector San Juan, Waterways Management Division Chief, Coast Guard; telephone (571) 613-1417, email Rachel.E.Thomas@uscg.mil . SUPPLEMENTARY INFORMATION: I. Table of Abbreviations CFR Code of Federal Regulations COTP Captain of the Port DHS Department of Homeland Security FR Federal Register NPRM Notice of proposed rulemaking § Section U.S.C. United States Code II. Background and Authority The Coast Guard docking facilities at Base San Juan in La Puntilla Old San Juan, Puerto Rico are home to several …