"The Union Solidarity and Development Party (Burmese: ပွညျထောငျစုကွံ့ခိုငျရေးနှင့ျဖှံ့ဖွိုးရေးပါတီ; abbreviated USDP), which was registered on 2 June 2010 by the Union Election Commission, currently standing as an opposition political party, is the successor to the Burmese government?s mass organisation, the Union Solidarity and Development Association. It was headed by President Thein Sein until 2013, and its headquarters are in Naypyidaw?s Dekkhinathiri Township.[3] In the 2010 general election, the USDP won 883 seats out of 1154 total seats, 259 seats of 325 seats from Pyithu Hluttaw, 129 seats of 168 seats from Amyotha Hluttaw and 495 seats of 661 seats from Region and State Hluttaw (holding the majority in all, except the Rakhine State Hluttaw).[4] On 4 March 2011, two USDP MPs from Bago Region, Ant Gyi, a Pyithu Hluttaw MP representing Thanatpin Township, and Cho Nwe Oo, representing Constituency 7 (Oktwin and Htantabin Townships) were disqualified by the Union Electoral Commission for failing to meet the constitutional requirements for citizenship (as both have a parent who are not Burmese citizens).[5]"