Balancing Service Providers representing Dispatchable Generating Units and Dispatchable Pumped Hydroelectric Generating Units shall submit the following to the HETS Operator:

a) ISP Balancing Energy Offers,

b) Balancing Capacity Offers,

c) Techno-Economic Declarations,

d) Non-Availability Declarations and

e) Major Outage Declarations.

Balancing Service Providers representing Dispatchable RES Units Portfolios or Dispatchable Load Portfolios are entitled to submit to the HETS Operator:

a) ISP Balancing Energy Offers, and

b) Balancing Capacity Offers.

In the event that the Balancing Services Providers representing Dispatchable RES Unit Portfolios or Dispatchable Load Portfolios should submit ISP Balancing Energy Offers and/or Balancing Capacity Bids to the HETS Operator, they must submit Non-Availability Declarations to the HETS Operator for the specific Dispatch Day.

Balancing Service Providers representing Balancing Service Entities, which wish to be placed under Commissioning Operation regime lasting more than four (4) hours and Balancing Service Providers representing entities under Testing Operation regime are obliged to submit to the HETS Operator preliminary Declarations of Operating Schedules in Commissioning Operation or Testing Operation at 08:00 EET for Dispatch Day, D and revised by 09:30 EET of Dispatch Day D-1. The above Balancing Service Providers have the right to submit to the HETS Operator updated schedules of Commissioning Operation or Testing Operation. The initial Declarations of Operation Schedules and the updated schedules of Commissioning Tests or Testing Operation are accepted after the approval of the HETS Operator, which is communicated to the Balancing Service Providers.

The above Declarations of Operation Schedules concern an entire Dispatch Day and the relevant Operation Schedule for the last hour of the specific Dispatch Day is zero. Exceptionally, the above Declarations of Operation Schedules may include a non-zero quantity at the last hour of the Dispatch Day if the Commissioning Operation or Operation Tests continue on the following Dispatch Day.

The Balancing Service Providers representing Balancing Service Entities, which wish to be placed under Commissioning Operation regime lasting four (4) hours or more for the Dispatch Day, D submit to the HETS Operator Declarations of Operation Schedules for Commissioning Operation until 17:00 EET in Dispatch Day, D-1 and updated Commissioning Operation schedules within Dispatch Day, D. The above declarations are not considered in the Day-Ahead Market as well as in ISP. The respective Operating Schedule for Dispatchable Generating Units and Dispatchable RES Portfolios for the last mFRR Time Unit of Commissioning Trial Operation must be equal to the relevant Market Schedule for that specific Market Time Unit. The above Commissioning Operation is carried out after approval by the HETS Operator. In particular, for the Dispatchable Generation Units and the Portfolios of Dispatchable Intermittent RES Units, the above Commissioning Operation is carried out after approval by the HETS Operator if the following are cumulatively met:

a) according to the results of the ISP for each Dispatch Period within the intended duration of the Commissioning Operation, the Generation Unit or the Portfolio of Dispatchable Intermittent RES Units is loaded at least to its Technically Minimum Generation, and

b) after checking by the HETS Operator, no problems arise in the safe operation of the System during the intended duration of the Commissioning Operation

The Balancing Service Providers representing Dispatchable hydro Generating Units have the obligation to submit to the HETS Operator hydro resources management declarations in accordance with CHAPTER 7 of this Rulebook.

The Balancing Service Providers representing Dispatchable hydro Generating Units shall submit, if required, to the HETS Operator declarations of maximum daily energy Injection constraint in accordance with CHAPTER 7 of this Rulebook. The Regulatory Authority for Energy, Waste and Water may exercise its powers, to request and review the aforementioned declarations.