IRB Canada har sammanställt information daterad mars/april 2008 om partiet UDPS (se bilagor)

Democratic Republic of the Congo: Membership cards for the Union for Democracy and Social Progress (Union pour la démocratie et le progrès social, UDPS), including the content of these cards; who may issue UDPS membership cards and whether any new cards have been issued since 2003

Democratic Republic of the Congo: The number of members and offices of the Union for Democracy and Social Progress (Union pour la démocratie et le progrès social, UDPS); the importance of the UDPS compared with other political parties