Chad has reacted angrily to warnings from the World Bank, after its parliament voted to relax controls on the use of its oil revenues.
The government has accused the World Bank of acting like a coloniser.
The body lent Chad more than $39m (£23m) to build a pipeline with an estimated total cost of almost $4bn.
It was on condition that Chad's churches, trade unions and non-governmental organisations monitored how oil revenues were spent.
This was meant to guaranteed that oil money was used to help reduce poverty in Chad but the new laws would give Chad more control over the money.
The bank has warned if Chad breaks its agreement, that is a breach of contract. Further funds will be halted, and repayment rates on the current loan increased.
World Bank President Paul Wolfowitz said the law was a deciding factor in the bank's financial support for the massive pipeline project in 1999.
But the government has accused the bank of treating Chadians like guinea pigs on which to experiment with different types of management.
It wants to use $36m of revenues held in a fund that is meant to tackle poverty to deal instead with the country's financial problems.
The changes agreed by Chad's parliament on Thursday still need to be ratified by President Idriss Deby.