Member States shall take the necessary measures to ensure that seafarers serving on ships are trained as a minimum in accordance with the requirements of the STCW Convention, as laid down in Annex I to the Directive, and hold certificates and/or documentary evidence.Member States shall take the necessary measures to ensure that those crew members that must be certified in accordance with Regulation III/10.4 of SOLAS 74 are trained and certified in accordance with the Directive.