2011-08-01
Bank Indonesia issued Regulation Number 13/17/PBI/2011 to amend the specifications for the 50,000 Rupiah banknote by introducing enhanced security features for notes printed from July 2011 onwards. The regulation details specific design elements for the obverse and reverse sides, including updated watermarks, optically variable ink, and ultraviolet-reactive images, while deleting previous provisions. It further declares that previously issued 50,000 Rupiah notes remain legal tender and establishes the regulation's effective date as August 1, 2011.