1. The Balancing Market System shall perform all the procedures and all the necessary calculations, and shall record all the data and the results of the Balancing Market in connection to the ISP, the Balancing Energy Market and the Balancing Market Settlement. The Balancing Market System shall include the following subsystems:

   a) the HETS Operator Registry,

   b) the Physical Transmission Rights Declaration Submission System of the HETS Operator,

   c) the Balancing Market Bidding Submission System,

   d) the Dispatch Information Administration System, including: the Load Forecasting / RES Injection Forecasting / Reserve Requirements Forecasting Mechanism, the interface with the Energy Exchange for acquisition of the Market Schedules of all Entities, the Integrated Schedule Process solution mechanism and the Balancing Energy Market solution mechanism, the mechanism that produces the Dispatch Instructions in real time and the interface with the Supervisory Control and Data Acquisition System (SCADA).

   e) the Balancing Market Settlement System, which carries out all clearing calculations and processes, as well as acting as the interface with the Clearing House;

   f) the Participant Communication System and the databases required for the operation of all of the above; and

   g) the systems and databases required for the participation of the HETS Operator in the European Platforms as per Regulation (EU) 2017/2195.

2. The HETS Operator shall operate and maintain the Balancing Market System. The Balancing Market System must be fully compatible with the functions provided for in this Rulebook.

3. The HETS Operator shall take the appropriate measures to prevent any operational issues in the Balancing Market System and shall try to restore any failure or malfunction, as soon as possible. The HETS Operator shall not be liable to the Participants for any loss they may incur due to any unforeseen failure or malfunction in the Balancing Market System, even temporary ones, or due to any loss of data from the Balancing Market System, or due to any malicious use of the Balancing Market System or the data therein by third parties.

4. The Balancing Market System supports the commonly accepted principles of good business practices, it is based on modern, appropriate and reliable information and communication technologies and complies with strict standards of uninterrupted operation, increased reliability and integrity of information.

5. The Balancing Market System databases are protected by an appropriate security system that does not allow access to classified information to unauthorized persons. The System itself provides protection against deletion of information from the databases.

1. The HETS Operator shall provide the specified access to the Balancing Market System if the following conditions are met:

   a) the registered Balancing Service Provider/registered Balance Responsible Party has fulfilled the authentication requirements. These requirements may include, inter alia, the obligation to provide an electronic certificate for signature, encryption or other authentication technology purposes, and

   b) the representative(s) of the Registered Balancing Service Provider/registered Balance Responsible Party, for whom the user account (s) is (are) created in the Balancing Market System, has (have) succeeded in the suitability test conducted by the HETS Operator on the proper use of the Balancing Market System.

2. The HETS Operator shall confirm the creation of the User Account (s) or send a rejection note to the registered Balancing Service Provider/Balance Responsible Party, no later than five (5) business days from the completion of the suitability test by the Balancing Market representative(s) of the registered Balancing Service Provider/Balance Responsible Party. The confirmation or rejection shall be sent by any means to the designated representative of the registered Balancing Service Provider / Balance Responsible Party.

3. If the conditions referred to in paragraph 1 of this Article are not met, the HETS Operator shall notify the registered Balancing Service Provider / Balance Responsible Party of the rejection and shall not grant access to the Balancing Market System.

1. The HETS Operator shall ensure that the Balancing Market System is certified by an independent inspection firm, which shall certify compatibility with the functions and procedures included in this Rulebook and shall conduct either:

   a) a full inspection, or

   b) A partial inspection of the changes and their impact on the remainder of the Balancing Market System.

   Such certification shall take place every time the Balancing Market System is significantly modified. The HETS operator shall publish the inspection certificate on its website.

2. Every time the HETS Operator shall determine whether a full inspection or partial inspection is needed time at its discretion.

1. Communication between the HETS Operator and the Participants, which includes all notifications or submissions provided for in this Rulebook, shall be performed by electronic means through the Balancing Market System. In case communication through the Balancing Market System is not possible for any reason, or in case of emergency, communication can take place by other means such as telephone, email or fax at the discretion of the HETS Operator.

2. The HETS Operator shall use the appropriate international standards to establish appropriate interconnection protocols for the Participants to communicate with the Balancing Market System and shall make these interconnection protocols available to all requesting persons. The Participants shall put into service systems that are suitable for effective communication with the Balancing Market System operated by the HETS Operator.

3. The Balancing Market System automatically issues an acknowledgment of receipt, which is sent directly to the Participants through the Participants Communication System.

4. In the event of a total or partial unavailability of the Participants Communication System, the HETS Operator shall immediately notify all the Participants by sending a relevant notice by any appropriate means, specifying the procedure to be followed for further communication and the expected amount of time required to restore the system availability. As soon as the system is restored, the HETS Operator shall notify all Participants electronically.

5. In any case, the Participants Communication System shall be the preferred route of communication as long as there is no unavailability issue. In that case, the provisions on Emergency Situations, as defined in the HETS Grid Code, shall apply.

6. Each Participant shall comply with specific standards in its communications with the HETS Operator. These standards shall apply with regard to the operational capability, reliability and safety of its own communication centers and the appropriate computer and data networking equipment. The equipment must be used by the Participants only for their communications with the Balancing Market System.

7. Each Participant shall be responsible for the provision and maintenance of telephone, fax and e-mail equipment at its own expense.

8. The HETS Operator shall not be liable to the Participants for the timely transmission of offers, declarations or other data from the Participants, or for technical failures in the systems and the equipment used by the Participants to communicate with the Balancing Market System.

The HETS Operator shall inform the Participants about the Balancing Market System and shall provide support and instructions so that they can get a suitable and compatible system for their communication with the Balancing Market System.

1. The HETS Operator shall keep a record of all the information used for the execution of its responsibilities under this Rulebook, for at least five (5) years. The HETS Operator shall provide the Participants with a copy of the information pertaining to them, in editable form, at their request.

2. All data generated by the Balancing Market System are the property of the HETS Operator.

1. The HETS Operator shall publish on its web site, at the end of each calendar month, information on the operation of the Balancing Market in the preceding calendar month, which shall include at least the following items:

          a) the total electricity and maximum total HETS load per Dispatch Day,

          b) the zonal imbalances per Imbalance Settlement Period,

          c) any important HETS events,

          d) aggregate information on Dispatch Instruction violations by Balancing Service Providers.