International Arbitration 2025

MEXICO Law and Practice Contributed by: Jorge Asali, Omar Colomé, Rodrigo Macin and Saul Fonseca, Bufete Asali

13.5 Binding of Third Parties Whether a third party may be bound by an arbitration agreement or an arbitral award under Mexican law is a highly fact-specific issue, generally determined on a case-by-case basis. While Mexican courts have recognised that arbitration agreements may, in lim - ited circumstances, extend to third parties – such as successors-in-interest or those involved in complex contractual structures – they have not developed a clear, comprehensive doctrine on this point. When it comes to arbitral awards, the situation is even less defined. In theory, general principles of contrac - tual succession (eg, assignment, inheritance) could support extending the effects of an award to certain non-signatories, but there is no settled jurisprudence confirming this approach. As of now, there are no known judicial decisions in Mexico expressly binding third parties to an award on the basis of such princi - ples. Regarding foreign third parties, Mexican courts do not have a specific legal framework empowering them to bind individuals or entities outside the jurisdiction who were not party to the arbitration. Any such determina - tion would depend on private international law princi - ples and the particular facts of the case.

Overall, ethical standards in Mexican-seated arbitra - tions are shaped more by international practice and party autonomy than by domestic regulation. 13.3 Third-Party Funding There are currently no specific rules or restrictions on third-party funding in arbitration under Mexican law. The Mexican Commerce Code does not regulate the use of third-party funders, and there is no official guidance or case law addressing their involvement in arbitral proceedings. That said, parties are generally free to arrange their own financing, subject to disclosure obligations that may arise under applicable ethical standards or insti - tutional rules. In practice, issues related to third-party funding – such as disclosure or conflicts of interest – are typically addressed through reference to interna - tional soft law instruments, such as the IBA Guidelines Mexican law does not expressly regulate the consoli - dation of arbitral proceedings. Therefore, consolida - tion is only possible to the extent that the applicable arbitration rules (agreed upon by the parties) allow it. For arbitrations administered under institutional rules that provide for consolidation, such as the ICC or LCIA, tribunals may consolidate proceedings if the conditions set forth in those rules are met. In ad hoc arbitrations, however, consolidation would be significantly more complex and uncertain, as there is no procedural framework or precedent in Mexico to guide such efforts. Without party agreements or express procedural rules, it is unclear how or whether consolidation could be implemented effectively. on Conflicts of Interest. 13.4 Consolidation

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