Emergency relief action filed to prevent Companhia do Metropolitano de São Paulo – METRO from initiating administrative proceedings and imposing sanctions against CORSAN until the arbitral decision on the dispute arising from administrative contracts. Grant of a preliminary injunction by the court a quo, subsequently reversed. Upholding of the reversal on the grounds that "arbitration clauses and their application cannot function as a mechanism preventing the respondent (Metrô) from exercising its [police] power, since, among other aspects, they involve unavailable public interest":