Document type Individual Decisions Month May Feedback Off Feedback form Document feedback Annex ACER Decision 04-2021 on the Determination of Capacity Calculation Regions - Annex I ACER Decision 04-2021 on the Determination of Capacity Calculation Regions - Annex Ia ACER Decision 04-2021 on the Determination of Capacity Calculation Regions - Annex II Year 2021