OBS_VALUE: The registration of ships and vessels is mandatory and, since 2019, it does not depend on the applicant's nationality or registered office. Ships and vessels registered under the terms of Decree-Law 92/2018 fly the Portuguese flag for all legal purposes.Also, the international registration or offshore registration, via the International Shipping Registry of Madeira imposes no restrictions to own or register vessels  under national flags. At least 30% of the crew of the vessels registered in the International Shipping Registry of MadMAdeiraeria must be Portuguese nationals, or EU nationals or nationals from countries where Portuguese is the official language. The government can waive this requirement in specific cases.At the EU level, Regulation 789/2004 prevents Member States from withholding from registration, for technical reasons arising from International Conventions, a ship registered in another Member State which complies with the requirements and carries valid certificates and equipment.