This Rulebook, the Balancing Service Contract, the Balance Responsible Party Contract, the HETS Grid Code and the HETS Transactions Contract constitute the full agreement between the HETS Operator and each registrant entered in the HETS Operator Registry.

If any provision of this Rulebook or the Balancing Service Contract or the Balance Responsible Party Contract or the HETS Grid Code or the HETS Transactions Contract is declared null, unenforceable or unlawful by the competent courts, or according to an arbitration or by order of a competent authority, such nullity, non-enforceability or unlawfulness shall not prejudice or affect the remaining provisions of this Rulebook, the Balancing Service Contract or the Balance Responsible Party Contract or the HETS Grid Code or the HETS Transactions Contract, which shall continue to be in force and have legal effects.