BUENOS AIRES, Argentina, May 1 /PRNewswire-FirstCall/ -- Empresa Distribuidora y Comercializadora Norte S.A. (NYSE: EDN; Buenos Aires Stock Exchange: EDN) ("EDENOR" or "the Company") informs the market that on April 30, 2007 the Argentine Secretary of Energy published Resolution 434/2007 ("the Resolution") revising the tariff adjustment timeline contemplated by the Adjustment Agreement (Acta Acuerdo) between Edenor and the Argentine government, which was ratified by Decree No. 1957 on December 28, 2006. The Resolution provides that the transition period established by the Adjustment Agreement would be in effect from January 6, 2002 until the Integral Tariff Adjustment ("RTI") goes into effect. In addition, the Resolution establishes that the new tariff structure resulting from the RTI will take effect on February 1, 2008. In the event that the tariff resulting from the RTI is higher than the tariff contemplated by the Adjustment Agreement, the increase will be made in two phases; the first adjustment will take effect February 1, 2008 and the second will take effect 6 months later in the proportions set forth in the Adjustment Agreement. The Resolution also requires the Company to present an investment plan by no later than May 1, 2007. The Company has already complied with this requirement. Finally, the Resolution extends the obligations and commitments regarding the suspension of claims against the Argentine government and other matters set forth in the Adjustment Agreement until the entry into force of the new tariff structure resulting from the RTI, allowing the Company and its shareholders to reassert their suspended claims if this new tariff structure does not come into effect as described above. About Edenor Empresa Distribuidora y Comercializadora Norte S.A. (Edenor) is the largest electricity distribution company in Argentina in terms of number of customers and electricity sold (both in GWh and Pesos). Through a concession, Edenor distributes electricity exclusively to the northwestern zone of the greater Buenos Aires metropolitan area and the northern part of the city of Buenos Aires, which has a population of approximately 7 million people and an area of 4,637 sq. km. In 2006, Edenor sold 16,632 GWh of energy and purchased 18,700 GWh of energy, with net sales of approximately Ps. 1.4 billion and net income of Ps. 293.1 million. For more information, visit our website at http://www.edenor.com/. This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates of future economic circumstances, industry conditions, Company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the Company, are intended to identify forward- looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties, including those identified in the documents filed by the Company with the U.S. Securities and Exchange Commission. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations. DATASOURCE: Edenor CONTACT: investors: Buenos Aires, Ivana Del Rossi, +5411-4346-5127 or (fax) +5411-4346-5303, Veronica Gysin, +5411-4346-5231 or (fax) +5411-4346-5303, , all of Edenor; New York, Melanie Carpenter/Maria Barona of i-advize Corporate Communications, +1-212-406-3690 or (fax) +1-212-509-7711, Web site: http://www.edenor.com.ar/

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