Certification under Rule 466

The Depositary, Citibank, N.A., represents and certifies the following:

(1)   That it previously had filed a Registration Statement on Form F-6
      (Companhia Energetica de Minas Gerais - CEMIG, File No. 333-13826), which
      the United States Securities and Exchange Commission declared effective,
      with terms of deposit identical to the terms of this registration
      statement (except for the number of securities a depositary share
      represents).

(2)   That its ability to designate the date and time of effectiveness under
      Rule 466 has not been suspended.


                                   Citibank, N.A., as Depositary


                                   By: /s/ Patricia Brigantic
                                   Name: Patricia Brigantic
                                   Title: Director and Associate General Counsel