 These, and subsequent issues of the first and second dollars were time limited and lacked sophisticated anti-counterfeiting measures which were heavily used in many modern banknotes such as those of the Swiss Franc.In the first half of 2006 new denominations of $50 000 and $100 000 were issued, with the $1 million denomination being planned for September 2006; it was subsequently never issued.The time limits were either ignored or extended by multiple decrees, meaning that all notes of these issues remained legal tender in practice until 21 August 2006.