Irrespective of the flag it flies, each ship, with the exception of those types of ships excluded by Article 2, shall, while in the ports of a Member State, be subject to port State control by officers duly authorised by that Member State to verify that all seafarers serving on board who are required to hold a certificate of competency and/or a certificate of proficiency and/or documentary evidence under the STCW Convention, hold such a certificate of competency or valid dispensation and/or certificate of proficiency and/or documentary evidence.

When exercising port State control under this Directive, Member States shall ensure that all relevant provisions and procedures laid down in Directive 95/21/EC are applied.