**Exhibit 12.1**

 

**CERTIFICATION**

 

I, Djalma Bastos de Morais,certify that:

 

1.         Ihave reviewed this annual report on Form 20-F of CEMIG;

 

2.         Basedon my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary in order to make thestatements made, in light of the circumstances under which such statements weremade, not misleading with respect to the period covered by this report;

 

3.         Basedon my knowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this report;

 

4.         Thecompany’s other certifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the company and have:

 

a. designed such disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensure thatmaterial information relating to the company, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared;

 

b. evaluated the effectiveness of the company’s disclosure controls andprocedures and presented in this report our conclusions about the effectivenessof the disclosure controls and procedures, as of the end of the period coveredby this report based on such evaluation; and

 

c. disclosed in this report any change in the company’s internal controlover financial reporting that occurred during the period covered by the annualreport that has materially affected, or is reasonably likely to materiallyaffect, the company’s internal control over financial reporting; and

 

5.         Thecompany’s other certifying officer and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to the company’sauditors and the audit committee of company’s board of directors (or personsperforming the equivalent functions):

 

a.  allsignificant deficiencies and material weaknesses in the design or operation ofinternal controls over financial reporting which are reasonably likely toadversely affect the company’s ability to record, process, summarize and reportfinancial information; and

 

b.  anyfraud, whether or not material, that involves management or other employees whohave a significant role in the company’s internal control over financialreporting.

 

 
|   | /s/ Djalma  Bastos de Morais |                     |
|--------|------------------------------|--------------------------|
|   | Name:                        | Djalma Bastos  de Morais |
|   | Title:                       | Chief Executive Officer  |
|   |                         |                     |
| Date:  | May 25, 2005            |                     |   |
|        |                              |                          |  |  |

 

 

A signed original of this written statementrequired by Section 302 of the Sarbanes-Oxley Act of 2002 has beenprovided to the Company and will be retained by the Company and furnished tothe Securities and Exchange Commission or its staff upon request.

 

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