Tonga Post Limited was formed in 2008 as a public enterprise. It's shareholder is the Government of Tonga. It's Board of Directors is responsible to the shareholding Minister for the enterprise's performance. As the designated postal operator for the country, it is a member of the Universal Postal Union (UPU), and the Asia and Pacific Postal Union (APPU). It is estimated that the volume of business is 90% international mail and 10% domestic mail. The major postal partners that exchange most mail items with are United States Postal Services, Australia Post, New Zealand Post and Post Fiji. The delivery standards are subject to changes in international flights.