This excerpt taken from the PBR 6-K filed Mar 21, 2006.
(a) Acquisition of interest of GASMIG
On August 25, 2004, PETROBRAS, through its subsidiary PETROBRAS GÁS S.A. GASPETRO, agreed to the acquisition of 40% interest of the capital of Companhia de Gás de Minas Gerais GASMIG, according to the Association Agreement with Companhia Energética de Minas Gerais CEMIG, dated August 11, 2004, in order to promote natural gas consumption in the Minas Gerais State. The acquisition was approved by the Minas Gerais State Legislature through Law No. 15.404, dated December 3, 2004. The operation was concluded on December 15, 2004 by GASPETRO and its subsidiary TSS Participações S.A., for US$ 58. The acquisition of GASMIG was recorded using the equity method of accounting.