Jurisdiction: United States United States

Rules issued by an executive authority, such as a government department or agency in the executive branch, to carry out the intent of the law. Regulations issued by the federal government are first published in the Federal Register, then arranged in the Code of Federal Regulations (CFR). Immigration regulations issued by the Department of Homeland Security are codified in Title 8 CFR, Aliens and Nationality.

Source: USCIS Glossary, U.S. Citizenship and Immigration Services