(5)The transfer of cargo and passenger ships flying the flag of a Member State between the registers of Member States should not be impeded by technical barriers, provided that the ships have been certified as complying with the provisions of relevant international Conventions by Member States or, on their behalf, by the organisations recognised under Council Directive 94/57/EC of 22 November 1994, on common rules and standards for ship inspection and survey organisations and for the relevant activities of maritime administrations [3].