The United States Ambassador to Luxembourg supervises the embassy staff, the embassy staff provides consular services and from 1923 the Ambassador to the Belgium never served concurrently as Ambassador to any other country.
He or she supervises the embassy staff in the conduct of diplomatic relations with the Grand Duchy of Luxembourg and coordination of the activities of U.S. Government personnel serving in Luxembourg as well as official visitors. Under the ambassador's direction, the embassy staff provides consular services, including visas for visitors to the United States and passports for United States citizens in Luxembourg. From 1923 until World War II the Ambassador to Belgium also served as Ambassador to Luxembourg. After World War II, the United States returned to appointing the Ambassador to Belgium concurrently as the Ambassador to Luxembourg. 
