Electricity purchase and sale contracts containing an arbitration clause between energy generators and a mixed-capital company (Copel Distribuição S/A). Citizen's action seeking the annulment of the contracts on the grounds of alleged misappropriation of public funds. Notwithstanding the fact that the kompetenz-kompetenz principle has been recognized in Brazilian law, there is the possibility that the mixed-capital company may appear as plaintiff in the citizen's action, given that it does not seek to challenge the validity of the arbitration clause or to annul the arbitration awards already rendered. Dismissal of the citizen's action, on the grounds that no irregularities in the contracts were demonstrated and that the contracts had already been terminated by arbitral decisions: