(22)To certify that a driver who is a national of a Member State is the holder of one of the CPCs provided for by this Directive, and to facilitate mutual recognition of the various CPCs, Member States should affix the harmonised Union code laid down for that purpose, together with the code’s expiry date, either to the driving licence or to the driver qualification card, to be mutually recognised by Member States, the standard model of which is depicted in Annex II to this Directive. That card should meet the same security requirements as the driving licence, given the importance of the rights which it confers for road safety and the equality of conditions of competition.