Mozambican metical 24,500 meticais per USD, until the Zimbabwean dollar took the title in late August 2005. On July 1, 2006, Mozambique redenominated the metical at a rate of 1000:1. The new ISO 4217 code is MZN. New coins and banknotes were introduced on July 1, 2006, and the transitional period during which both old and new meticais could be used lasted until December 31, 2006. During the conversion, the new currency was locally abbreviated as MTn, but has since largely returned to MT. Old meticais were redeemed by the Bank of Mozambique for a period of six years, until December 31,
Monetary policy of the United States Reserve was amended to formalize the already-existing annual practice of ordering independent audits of financial statements for the Federal Reserve Banks and the Board; the GAO's restrictions on auditing monetary policy continued, however. Congressional oversight on monetary policy operations, foreign transactions, and the FOMC operations is exercised through the requirement for reports and through semi-annual monetary policy hearings. Scholars have conceded that the hearings did not prove an effective means of increasing oversight of the Federal Reserve, perhaps because "Congresspersons prefer to bash an autonomous and secretive Fed for economic misfortune rather than to share the responsibility for that misfortune