Overview
- On Nov. 1, 2025, the ad hoc Annulment Committee kept the execution of the ARB/17/3 award suspended while Peru’s partial annulment proceeds.
 - The Committee rejected Metro de Lima Línea 2 S.A.’s requests to lift the stay or impose a financial guarantee on Peru, citing no payment risk and the state’s solvency.
 - It found Peru acted in good faith and deemed the March 4 annulment filing non‑dilatory.
 - The panel warned that ending the stay could substantially prejudice Peru and harm CIADI’s institutional coherence given a parallel review of the same award.
 - Peru continues its defense with Squire Patton Boggs, which has been paid S/9.9 million, as ACS-linked claims tied to the concession exceed $200 million in contested liabilities.