Action to annul an arbitration award. Contract for the provision of security services containing a clause prohibiting the hiring of another company that employs former employees of the contracting party, with a stipulated penalty. Decision in a public-interest civil action, with erga omnes effect, declaring the abusiveness of such prohibition for the protection of the diffuse rights of workers. Arbitration award between the contracting parties ordering payment of the penalty, which does not conflict with the public policy matters subject to the public-interest civil action. Possibility for the arbitration award to analyze the limits of the application of public policy in its reasoning, provided that its operative part does not violate it: