3. Member States may exempt from the application of paragraph 1, points (a) and (b) specific routes and ports in respect of the energy used on voyages performed by passenger ships other than cruise passenger ships between a port of call under the jurisdiction of a Member State and a port of call under the jurisdiction of the same Member State located on an island with fewer than 200 000 permanent residents, and in respect of the energy used during their stay within a port of call of that island. No such exemptions shall apply beyond 31 December 2029. Prior to the entry into force of those exemptions, Member States shall notify them to the Commission. The Commission shall publish those exemptions in the Official Journal of the European Union.