Division 1 The parts of the road network concernedF1

The Member State shall specify precisely the part or parts of their road network which are to be subject to an external-cost charge.

Where a Member State chooses to levy an external-cost charge on only a part or parts of the road network falling within the scope of this Directive, the part or parts shall be chosen after an assessment establishing that:

• vehicles’ use of the roads where the external-cost charge is applied generates environmental damage higher than that generated on average on other parts of the road network falling within the scope of this Directive that are not subject to an external-cost charge, or

• the imposition of an external-cost charge on other parts of the road network falling within the scope of this Directive might have adverse effects on the environment or road safety, or levying and collecting an external-cost charge on them would entail disproportionate cost.