Central & Eastern Europe

ACER Flags Non-Compliance in Slovak Gas Transmission Tariff Proposal, Issues Corrective Recommendations

SHERIDAN, WYOMING - April 13, 2026 - The EU Agency for the Cooperation of Energy Regulators (ACER) has released its compliance assessment of Slovak gas transmission tariffs proposed by Eustream, Slovakia's transmission system operator, finding that key elements of the methodology fail to meet EU Network Code on Harmonised Transmission Tariff Structures (NC TAR) standards and issuing concrete corrective recommendations to the Slovak national regulator ÚRSO ahead of its final tariff decision.

What Eustream proposed

Eustream's proposed reference price methodology (RPM) covers the multi-year tariff period 2026-2027 and includes several substantive changes to current practice. The most consequential is a mid-period tariff revision that would increase charges by more than 70%, which Eustream justifies by citing exceptional circumstances - specifically, a large drop in cross-system gas flows that has materially reduced revenue recovery.

GAZ-SYSTEM Becomes First Certified European Hydrogen Transmission Network Operator with ACER Support

SHERIDAN, WYOMING - April 09, 2026 - European hydrogen infrastructure is entering a new regulatory phase as GAZ-SYSTEM, Poland's gas transmission operator, becomes the first entity in the EU to seek and receive support for certification as a hydrogen transmission network operator - a requirement that all future hydrogen network operators across the bloc must satisfy before commencing operations.