Where maintenance of a pipeline or part of a transmission network has an impact on the amount of transmission capacity which can be offered at interconnection points, the transmission system operator(s) shall fully cooperate with their F1adjacent TSOs regarding their respective maintenance plans in order to minimise the impact on potential gas flows and capacity at an interconnection point. F2Where an adjacent TSO is a non-UK TSO, the transmission system operator must endeavour to fully cooperate with the non-UK TSO regarding their respective maintenance plans.