The Belgian government is appealing a ruling by its Data Protection Authority, which found the government's May bulk transfer of tax data of American citizens living in the country to the U.S. illegal under the EU General Data Protection Regulation, Courthouse News Service reports. The original complaint was brought to the ADP by the Association of Accidental Americans after the Belgian tax office transferred individuals' tax data to the U.S. Internal Revenue Service under a bilateral agreement requiring Belgium to report tax information of U.S. citizens living there.