Nov. 1 (Bloomberg) -- Argentina needs to work toward eliminating the importance of the informal, black market in the economy, tax agency chief Ricardo Echegaray said today in Buenos Aires when asked about new foreign exchange restrictions announced by the government.

To contact the reporter on this story: Silvia Martinez in Buenos Aires at smartinez19@bloomberg.net

To contact the editor responsible for this story: Bill Faries at wfaries@bloomberg.net