Change in the rules on renewal of Brazilian electricity concessions, and their impacts for Cemig Conference Call Companhia Energética de Minas Gerais – CEMIG (BM&FBovespa: CMIG4; CMIG3; NYSE: CIG; CIG.C) announces that it will present the market with details on the impacts on Cemig of the new rules for renewal of concessions in the Brazilian electricity sector, in a conference call to be held today, Wednesday, September 12, at 4.30 pm (Brasília time). The call will have simultaneous translation in English. Connect: +55–11 4688 6341 Password: CEMIG Playback of conference call: Tel.: +55–11 4688-6312 Password: 2379976 (Portuguese) 7889383 (English) Available: September 12 through 18, 2012 For any questions please call +55 31 3506-5024. Av. Barbacena 1200 Santo Agostinho 30190-131 Belo Horizonte, MG Brasil Tel.: +55 31 3506-5024 Fax +55 31 3506-5025