This excerpt taken from the PBR 20-F filed Jun 30, 2005.
We may not be able to pay our obligations under the standby purchase agreement in U.S. Dollars.
Payments by us to PIFCo for the import of oil, the expected source of PIFCos cash resources to pay its obligations under the PIFCo notes, will not require approval by or registration with the Central Bank of Brazil. There may be other regulatory requirements that we will need to comply with in order to make funds available to PIFCo. If we are required to make payments under the standby purchase agreement, Central Bank of Brazil
approval will be necessary. Any approval from the Central Bank of Brazil may only be requested when such payment is to be remitted abroad by us, and will be granted by the Central Bank of Brazil on a case-by-case basis. It is not certain that any such approvals will be obtainable at a future date. In case the PIFCo noteholders receive payments in Reais corresponding to the equivalent U.S. Dollar amounts due under PIFCos notes, it may not be possible to convert these amounts into U.S. Dollars. We will not need any prior or subsequent approval from the Central Bank of Brazil to use funds we hold abroad to comply with our obligations under the standby purchase agreement.