Pursuant to art. 827 of the Code of Civil Procedure, the means of challenge available against judgments apply, mutatis mutandis, to arbitral awards, including third-party opposition under art. 404 of the Code of Civil Procedure; that remedy enables a third party to assert the unenforceability of the decision against it on the ground that it prejudices one of its rights or was pronounced in fraud of its interests, so that the necessary subject-matter of the opposition can only be the decisional content of the award or the conduct of the arbitral proceedings in which it was rendered.
Third-party opposition to an arbitral award is inadmissible where the complaints raised by the opposing party do not challenge the decisional content of the award or the regularity of the arbitral proceedings, but relate exclusively to the service of the award in enforceable form; such service, being an act preliminary to potential enforcement proceedings, is extraneous to the award itself and does not affect its validity or substantive effectiveness, nor does it give rise to a current interest in bringing the opposition in the absence of a writ of execution duly served pursuant to art. 479 of the Code of Civil Procedure.