The transmission system operators shall enable permanent physical capacity to transport gas in both directions (‘bi-directional capacity’) on all interconnections between Member States, except:
Cuirfidh oibreoirí córais tarchurtha faoi deara go mbeidh buanacmhainn fhisiceach ann chun gás a iompar sa dá threo (“acmhainn dhéthreoch”) ar na hidirnaisc go léir idir na Ballstáit, ach amháin: