ACER (Agency for the Cooperation of Energy Regulators) released the 44th REMIT Quarterly on Thursday 21 May, the first systematic Q1 review of REMIT 2.0, and announced a joint ACER/EC workshop on 11 June titled "Advancing REMIT implementation and energy market surveillance"1. On Wednesday 20 May ACER launched its Electricity Network Tariff Repository, the first EU tool for cross-border power tariff transparency, and the same day published an analysis of the summer 2024 Southeast Europe price spike, estimating that fully enforcing the 70% minimum cross-zonal capacity rule would have delivered €580m of additional consumer welfare.
The compliance paradox stays unresolved. The REMIT 2.0 transaction-reporting guidance consultation closes on 12 June, one day after the workshop, leaving the operative posture for trading intermediaries through summer as operate-and-document. ACER has logged 204 STORs filed in 2025 against zero formal enforcement actions since the 29 April recast, and the first systematic Q1 review now sits in the public record. Hungary and Slovakia, named in ACER's 6 May TurkStream derogation opinions, face their 5 August EC ruling against this enforcement backdrop, with Kiskundorozsma-1 still awaiting Commission response inside the same window.
The European Commission convened the workshop alongside ACER as the formal compliance milestone; non-EU reporting intermediaries lose grandfather coverage from the 29 April recast and feed the surveillance uplift ACER demanded on 8 May. Against the enforcement noise, the Electricity Network Tariff Repository is the working operating-layer change: a cross-border power tariff transparency tool changes the interconnector spread economics from the bottom of the merit order up, and the €580m welfare estimate gives the 70% rule a number to enforce against rather than a discretionary debate. For desks running interconnector spreads, that tool is the genuine operating-layer change; the REMIT enforcement posture stays a tail-risk read until first action lands.
