Subject: File No. S7-11-06
From: AIgostinho F Cardoso
Affiliation: IRO - CEMIG - Companhia Energtica de Minas Gerais

February 26, 2007

Second part:

a) For how long should the auditor use his or her cumulative knowledge?

b) What is the meaning of subsequent years and how long does it take?

c) Which controls should be tested every year or on timely bases.