(10) Bilansigaas on gaas, mida süsteemihaldur müüb bilansihaldurile või ostab bilansihaldurilt bilansihalduri bilansiportfellis bilansiperioodil tekkinud ebabilansi katteks., defineeritakse selle seaduse ulatuses, (10) ‘Balance gas’ means gas which the system operator sells to the balance provider or purchases from the balance provider to cover the imbalance that has arisen during the balance period within the balance portfolio of the balance provider., defined within the scope of this Act