The Electronic Code of Federal Regulations (eCFR) is an up-to-date, continuously updated digital version of the Code of Federal Regulations, maintained by the National Archives and Records Administration's Office of the Federal Register in collaboration with the Government Publishing Office. It provides the public with reliable, current federal regulatory information. The U.S. Department of Homeland Security (DHS) is a cabinet-level department of the United States government established in 2002 to safeguard the nation from a broad range of threats. Created in response to evolving national security challenges, DHS unifies numerous federal agencies and missions under a single framework dedicated to protecting the American people, securing the nation's borders, strengthening cybersecurity, and coordinating emergency and disaster response efforts. Through its leadership in regulatory development, intelligence integration, and risk-based security operations, DHS provides authoritative guidance that shapes homeland security policies across the nation.DHS operates through a diverse set of component agencies, including the Federal Emergency Management Agency (FEMA), Transportation Security Administration (TSA), U.S. Customs and Border Protection (CBP), U.S. Immigration and Customs Enforcement (ICE), U.S. Citizenship and Immigration Services (USCIS), the U.S. Coast Guard, and the U.S. Secret Service. Together, these components carry out missions ranging from disaster preparedness and response to immigration services, border and port security, maritime safety, and protection of national leaders and critical infrastructure. DHS's integrated approach ensures that regulations, policies, and security measures are informed by expertise drawn from multiple operational fields.With a commitment to transparency, public service, and national resilience, the Department of Homeland Security continues to support the development of reliable federal regulatory resources and public-facing guidance. Its contributions help policymakers, legal practitioners, businesses, and the general public better understand the regulatory frameworks and security policies that shape the homeland security landscape of the United States.