The yearly ahead hydro usage declaration refers to the upcoming twelve months and shall be submitted on a rolling basis up to five (5) days before the start of the first month to which it refers. The yearly ahead hydro usage declaration shall be submitted to the HETS Operator, accompanied by the evidence on the maximization of the hydro resources value and the overall benefit of using the Dispatchable hydro Generating Units for the electricity sector.

The yearly ahead hydro usage declaration shall determine for each month of the following twelve-month period, as a sum for all Dispatch Periods of the Dispatch Days of the month, as a sum for all Dispatchable hydro Generating Units of each Balancing Service Provider, and for three (3) hydrological scenarios (high, low and intermediate total inflows) the following:

a) the schedule of forecasted energy injection due to mandatory operation,

b) the schedule of forecasted generation of additional energy,

c) the expected water inflows in the reservoirs, and

d) the forecasted water reserves in the reservoirs at the end of the month.

Within one (1) month of the end of each year, the Balancing Service Providers representing Dispatchable Hydro Generating Units shall submit a report to the HETS Operator and the RAEWW regarding hydro resource management during the previous year. The report shall include: 

a) The accounting statements pursuant to paragraph 1 of this Article, 

b) a comparison with the corresponding yearly ahead hydro usage declarations and evidence on the imbalances and

c) evidence on the maximization of the hydro resources value and the overall benefit of using the Dispatchable hydro Generating Units for the electricity sector.