28 C.F.R. § 0.151
The Director of the Federal Bureau of Investigation, the Director of the Bureau of Prisons, the Commissioner of Federal Prison Industries, the Commissioner of Immigration and Naturalization, the Administrator of the Drug Enforcement Administration, the Director of the Bureau of Alcohol, Tobacco, Firearms, and Explosives, the Director of the Office of Justice Assistance, Research and Statistics, the Director of the Executive Office for U.S. Attorneys, and the Director of the U.S. Marshals Service, as to their respective jurisdictions, and the Assistant Attorney General for Administration, as to all other organizational units of the Department are authorized to designate, in writing, pursuant to the provisions of sections 2903(b) and 2904 of title 5, U.S. Code, officers or employees to administer the oath of office required by section 3331 of title 5, U.S. Code, and to administer any other oath required by law in connection with employment in the executive branch of the Federal Government.
28 C.F.R. §0.151