Minister Gilmar Mendes, of the Federal Supreme Court (STF), said this Wednesday (10) that the approval of spending by the National Congress could be considered unconstitutional by the Court. In a post on social media, the Dean of the Supreme Court defended fiscal responsibility and said that the Court's jurisprudence requires that expenses or revenue waivers must take into account the economic impact of the measures. The minister did not mention a specific case. Related news: Senate approves use of the Pre-Salt Fund for agricultural debts. "Every legislative proposal that creates or changes mandatory expenses or revenue waivers must be accompanied by an estimate of its budgetary and financial impact. In other words, Congress needs to demonstrate how much it costs and where the money comes from before approving new expenses", he stated. Mendes added that the absence of prior financial impact studies could lead to the annulment of legislative measures. “It is therefore necessary to have fiscal responsibility and fidelity to the Constitution, avoiding the creation of individual expenses in non-compliance with the established rules, which could result in the measure being invalidated and, therefore, ineffective”, he added. Earlier, the Senate approved a project that authorizes the renegotiation of debts of rural producers affected by climate and geopolitical events, such as the war in Iran. The measure could have a major impact on the federal government's accounts.  According to the Minister of Finance, Dario Durigan, the impact of the approval could reach R$140 billion.