Article 21 6

(a)

to cooperate and develop technically feasible options, without changing the gas quality specifications, which may include flow commitments and natural gas treatment, in order to remove the recognised restriction taking into account information provided by final customers directly connected to the natural gas system of the transmission system operator concerned or any other stakeholder that could be affected by that procedure;

(b)

jointly to carry out a cost-benefit analysis on the technically feasible options to define economically efficient solutions which shall specify the breakdown of costs and benefits among the categories of affected parties;

(c)

to produce an estimate of the implementation time for each potential option;

(d)

to conduct a public consultation, in particular of final customers affected that are connected to the natural gas system, on identified feasible solutions and take into consideration the results of that consultation;

(e)

to submit a joint proposal, on the basis of the cost-benefit analysis and results of the public consultation, for a solution removing the recognised restriction, including the timeframe for its implementation, to their regulatory authorities concerned for approval and to the other competent national authorities of each Member State concerned for information.