Einars Repše During this period, he oversaw the introduction of the Latvian rublis, Latvia's temporary transition currency, and the Lats, independent Latvia's new currency. Under Repše, the Bank of Latvia pursued a tight monetary policy, implementing a de facto currency board for the Lats. As a result, the exchange rate of the lat has been stable since the early 1990s till now. The success of the Lats made Repše very popular in Latvia. In 2001, Repše resigned from the Bank of Latvia to return to politics. He founded the New Era Party, a Populist anti-corruption party. After the 2002 elections, Repše became
Currency mostly paper, but Australia's Commonwealth Scientific and Industrial Research Organisation developed the world's first polymer currency in the 1980s that went into circulation on the nation's bicentenary in 1988. Now used in some 22 countries (over 40 if counting commemorative issues), polymer currency dramatically improves the life span of banknotes and prevents counterfeiting. Currency use is based on the concept of lex monetae; that a sovereign state decides which currency it shall use. Currently, the International Organization for Standardization has introduced a three-letter system of codes (ISO 4217) to define currency (as opposed to simple names or currency signs), in