The 90-day limitation period for a declaratory action seeking nullity of a partial arbitration award begins to run from the date of its rendition, not from the date of the final arbitration award. Extinction of a right because of lapse of time of the annulment action that challenges solely the partial award dismissing the request for joinder of a third party (Petrobrás) in the arbitration concerning the pass-through of ICMS costs under a natural gas purchase and sale contract. Reversal of the appealed decision, which had ordered the annulment of the arbitration proceedings and their recommencement: