The Market Operator informs market participants that information describing the changes to DUF and ELFA due to the modernisation of the tariff structure, with the expected effective date of 1 January 2027, has been published on the website under Užitečné informace pro PDS/PLDS — Čeština (only in Czech). A description of the structure and rounding rules for DUFVO and DUFMO messages effective as of 1 January 2027 is provided in the following document: https://www.ote-cr.cz/cs/dokumentace/dokumentace-elektrina/popis-struktury-dufvo-a-dufmo1_1_27_navrh_aktualizovano15-10-2026.xlsx (only in Czech).

The updated CDSINVOICE.xsd template for electronic invoicing, effective as of 1 January 2027, is available here: : https://www.ote-cr.cz/cs/dokumentace/dokumentace-elektrina/cdsinvoice.xsd. Changes are highlighted in red.

The Market Operator specifically draws attention to the fact that, in accordance with the ERÚ Price Decision, which sets the unit price for exceeding the reserved capacity in CZK/kW/month, the units used for items D012 and D033 will also be adjusted with effect from 1 January 2027 to ensure that the unit prices are consistent with the Price Decision. This means that the unit price label will be changed to "CZK/kW/month" (instead of the original "CZK/MW/month").

The above changes are already available to market participants for testing in the Market Operator's testing environment „Sandbox“.