Article 18a
1. A Member State that is a flag State of a vessel designated by the Sanctions Committee shall, if the Sanctions Committee has so specified, de-flag the vessel. 2. A Member State that is the flag State of a vessel designated by the Sanctions Committee shall, if the Sanctions Committee has so specified, direct the vessel to a port identified by the Sanctions Committee, in coordination with the port State. 3. A Member State that is the flag State of a vessel designated by the Sanctions Committee shall, if the Sanctions Committee has so specified, immediately deregister the vessel. 4. Member States shall, if the designation by the Sanctions Committee has so specified, prohibit entry into their ports of a vessel, except in case of emergency or in case of return to its port of origination, or unless the Sanctions Committee determines in advance that such entry is required for humanitarian purposes or any other purposes consistent with the objectives of UNSCRs 1718 (2006), 1874 (2009), 2087 (2013), 2094 (2013), 2270 (2016), 2321 (2016), 2356 (2017) or 2371 (2017). 5. Member States shall, if the designation by the Sanctions Committee has so specified, make a vessel subject to an asset freeze. 6. Annex IV shall contain the vessels referred to in paragraphs 1 to 5 of this Article designated by the Sanctions Committee in accordance with paragraph 12 of UNSCR 2321 (2016), paragraph 6 of UNSCR 2371 (2017) and paragraphs 6 and 8 of UNSCR 2375 (2017).