 However Cornell was issued a special permit by the War Department to operate a station in conjunction with a campus military unit.After the end of the war, in late 1919 the university was authorized to operate a "War Department Training and Rehabilitation School" station, WU6, which was followed early the next year by the reactivation of Experimental station 8XU.Effective December 1, 1921 the Department of Commerce, which regulated radio communication at this time, adopted regulations to formally establish a broadcast service category, which set aside the wavelength of 360 meters (833 kHz) for "entertainment" broadcasting, and 485 meters (619 kHz) for "market and weather reports".