2011-08-01
Bank Indonesia issued Regulation Number 13/16/PBI/2010 to amend the specifications for the 2004 issue of the 20,000 Rupiah banknote, primarily to enhance security features. The regulation defines detailed design and material requirements for banknotes printed between January 2009 and June 2011, including specific imagery of National Hero Oto Iskandar Dinata and tea harvesting, along with updated optical variable ink and watermark characteristics. It further declares that previously issued banknotes remain legal tender and establishes the regulation's effective date as August 1, 2011.