Overview
- The ruling, issued on December 4 and signed by Horacio Rosatti, Carlos Rosenkrantz and Ricardo Lorenzetti, confirms the constitutionality of Law 27.426.
- The Court revoked a mid‑2018 decision by the Federal Social Security Chamber that had struck down the timing of the first update under the reform.
- The justices cited Article 14 bis to affirm legislative authority over pension mobility and found no vested right to the prior formula because the earlier increase had not yet accrued by December 2017.
- The law introduced quarterly adjustments in March, June, September and December using a 70% IPC and 30% RIPTE formula and also redefined the initial benefit calculation.
- The decision closes the domestic litigation on the 2017 reform—now no longer in force—leaving only potential international avenues for the original plaintiff, whose case stemmed from a broader dispute marked by mass protests in December 2017.