 Since its creation, laws governing the zone's status have been amended six times, the most recent revision being approved by the Presidium of the Supreme People's Assembly on 3 December 2011.When Jang Sung-taek was purged in late 2013, the accusations against him included the charge that he had "made no scruple of committing such act of treachery in May last as selling off the land of the Rason economic and trade zone to a foreign country.