In the ERGEG Advice Comitology Guidelines on Fundamental Electricity Data Transparency Ref: E10-ENM-27-03 of 7 December 2010 in point 4.3 it is proposed that generators are responsible for providing generation data specified as follows:

1) ex-ante information on the total sum of generation capacity (MW) installed for all existing production units equalling or exceeding 1 MW installed capacity, for the three following years per production type as defined in Annex 1 of the guidelines (Annex 1 of the guidelines is available here), at the latest one week before the first year to which the data refers. The primary owners of the data are production units;

2) information about the installed gross capacity (MW) annually for the 3 following years for each production unit (installed and planned) with an installed capacity equal to or larger than 100 MW. This information shall contain the unit name, the installed capacity, the location, the bidding area and the production type as defined in Annex 1 of the guidelines and it shall be provided at the latest one week before the first year to which the data refers. The primary owners of the
data are generating units;

3) ex-ante forecast of available capacity (MW) annually for the three following years for each production unit (installed and planned) with an installed capacity larger than 100 MW. This information shall contain the unit name and the installed capacity. The primary owners of the data are production units;

4) ex-ante information on planned unavailability of generation units if the change in the available capacity is equal to or larger than 100 MW. The power plant name, the unit name, location, the bidding area, the installed capacity, the production type such as defined in Annex 1 of the guidelines, the start and estimated stop date (day, hour) of the unavailability, reason for the unavailability and the available generation capacity shall be provided. Any planned unavailability of a generation unit is only required to be reported if the unavailability lasts at least one market time unit. The information shall be published H+1 at the latest after the decision is made. The information shall be updated with changes at the latest H+1 after information is known. The primary owners of the data are generating units;

5) ex-post information on unplanned unavailability of generation units with a change equal to or more than 100 MW in available capacity. Information shall be published as soon as possible and not later than H+1 after the failure. The information shall include the station name, the name of the affected generating unit, location, the bidding area, the installed capacity, the production type such as defined in Annex 1 of the guidelines, the start and stop date (day, hour) of the unavailability, reason for the unavailability and the available capacity during event. Information shall be updated at the latest H+1 after stop date is known. Information on unplanned unavailability of a power generation unit is only required to be reported if the unplanned unavailability of this generation unit lasts at least one market time unit. The primary owners of the data are generating units;

6) estimated aggregated information per market time unit on the total scheduled generation per bidding area for each hour of the following day, to be published D-1, at 18h00 at the latest. The primary owners of the data are generating units;