It is believed that Glycerius primarily reigned from northern Italy, as all but one coin found from his reign were minted in either Ravenna or Milan. The only law created by Glycerius which has survived was dated 11 March 473, and issued to Himilco, the Praetorian Prefect of Italy, and later reissued to the Praetorian Prefects of Illyricum, the East, and Gaul, regarding simony. It was adopted not just by the Prefects of Italy and Gaul, who were a part of the Western Roman Empire, but also by the Prefects of Illyricum and the East, despite the fact that he did not actually have the authority to issue laws to them.