The Democratic Alliance (DA) challenged the constitutional validity of section 6(1)(a) of the South African Citizenship Act 88 of 1995. That provision provides for the automatic loss of South African citizenship by adult citizens who voluntarily and formally acquire the citizenship of another country, unless they first obtain ministerial permission to retain South African citizenship. The challenge was brought on behalf of affected citizens, illustrated by the case of Mr Phillip Plaatjes, who acquired British citizenship while living abroad and later discovered that his South African citizenship had been automatically lost without notice. When he attempted to renew his South African passport, it was cancelled on the basis of section 6(1)(a). The High Court dismissed the DA’s application, finding the provision rational and constitutionally permissible. The DA appealed to the Supreme Court of Appeal.