11. A Member State may decide that, in a port or in certain parts of a port under its jurisdiction, containerships or passenger ships at anchorage are covered by the same obligations set out in this Regulation applicable to ships moored at the quayside. The Member State shall notify its decision imposing such requirement to the Commission a year prior to the application thereof. Such decision must apply from the beginning of a reporting period. The Commission shall publish the information in the Official Journal of the European Union and make publicly available an updated list of the ports concerned. Such list shall be easily accessible.