Where the measures taken in accordance with paragraph 1 do not permit the elimination of differences between the exchange rules of Member States and where such differences could lead persons resident in one of the Member States to use the freer transfer facilities within the Community which are provided for in Article 67 in order to evade the rules of one of the Member States concerning the movement of capital to or from third countries, that State may, after consulting the other Member States and the Commission, take appropriate measures to overcome these difficulties.