The authority owns the Suez Canal and all areas, buildings and equipment is maintained. SCA issues the Rules of Navigation, specifies the tolls for the use of the canal and collects them. The tolls are expressed in XDR and collected several currencies. In 2008, the total revenue in tolls was 5,381.9 million USD for the passage of a total of 21,415 vessels - resulting in an average toll of 251,314.5 USD per vessel.