Member States shall ensure that passenger navigation experts and liquefied natural gas experts carry either a Union certificate of qualification issued in accordance with Article 11 or a certificate recognised in accordance with Article 10(2) or (3).
Áiritheoidh na Ballstáit go mbeidh teastas cáilíochta de chuid an Aontais, arna eisiúint i gcomhréir le hAirteagal 11, á iompar ag saineolaithe ar loingsiú paisinéirí agus ag saineolaithe ar ghás nádúrtha leachtaithe, nó go mbeidh teastas a aithnítear i gcomhréir le hAirteagail 10(2) nó (3) á iompar acu.