Enforcement of a letter of request. Complex contractual network involving several distinct companies in the commercial transaction that gave rise to the dispute. The fact that only the appellant was not a party to the agreement to arbitrate does not preclude a determination that it must bear the effects of the letter of request, including in order to guarantee the effectiveness of the proceedings to the participants in the arbitration proceedings. Harmonious coexistence of arbitral and state jurisdictions, with the judiciary having interpretive latitude to enforce decisions lawfully issued by arbitral tribunals: