The Agency , national regulatory authorities , ESMA , competent financial authorities of the Member States and , where appropriate , national competition authorities shall cooperate to ensure that a coordinated approach is taken to the enforcement of the relevant rules where actions relate to one or more financial instruments to which Article 9 of Directive 2003/6 / EC applies and also to one or more wholesale energy products to which Articles 3 , 4 and 5 of this Regulation apply .