"Each Immigration Court is staffed with Immigration Judges who conduct immigration hearings. They function in an independent decision-making capacity determining the facts in each case, applying the law, and rendering a decision. Their decisions are final unless appealed to the Board of Immigration Appeals. The judges may be assisted by a law clerk, who researches case law and provides other legal support as required. Under the supervision of an Assistant Chief Immigration Judge, the Court Administrator manages the daily activities of the court and supervises the support staff which usually includes interpreters and legal assistants. The Court Administrator is the liaison with the local Department of Homeland Security (DHS), the private bar, and volunteer organizations which represent aliens. Not all court hearings are conducted in the 56 court locations. In addition, the judges hold hearings in designated detail cities where the caseload is not sufficient to warrant the establishment of a permanent court. Hearings also are conducted in DHS detention centers around the country, as well as municipal, state and Federal penal institutions, in conjunction with the Institutional Hearing Program."
United States. Dept. of Justice. Executive Office for Immigration Review: http://www.justice.gov/eoir/