Former New Zealand Prime Minister Helen Clark is being tapped to head the U.N.'s global development network that operates in 166 countries.

Clark's nomination to be the next head of the U.N. Development Program _ overseeing an estimated $13 billion in resources _ was announced Thursday by U.N. spokeswoman Michele Montas.

The nomination must be approved by the 192-nation U.N. General Assembly.

Clark was New Zealand's prime minister from 1999 until 2008.

If confirmed, she will replace Kemal Dervis, a former Turkish Cabinet minister, who headed UNDP from August 2005 to February 2009.

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