Members of the UPU may establish restricted unions and make special agreements concerning the international postal service, provided always that they do not introduce provisions less favorable to the public than those provided for by the Acts of the UPU to which the member countries concerned are parties. Restricted unions are the Association of European Public Postal Operators (POSTEUROP), the Arab Permanent Postal Commission (APPC), the European Postal Financial Services Commission (CSFPE), the Conference of Postal and Telecommunications Administrations of Central Africa (CAPTAC), the European Conference of Postal and Telecommunications Administrations (CEPT), the African Posts and Telecommunications Union (APTU), the Baltic Postal Union (BPU), the Postal Union of the Americas, Spain and Portugal (PUASP), the African Postal Union (APU), the Pan African Postal Union (PAPU), the Asian-Pacific Postal Union (APPU), the Nordic Postal Union (NPU), and the South and West Asian Postal Union (SWAPU).