Directive 2014/36/EU of the European Parliament and of the Council of 26 February 2014 on the conditions of entry and stay of third-country nationals for the purpose of employment as seasonal workers

Article 23 - Right to equal treatment
‘1. Seasonal workers shall be entitled to equal treatment with nationals of the host Member State at least with regard to [...]
(b) the right to strike and take industrial action, in accordance with the host Member State’s national law and practice, and freedom of association and affiliation and membership of an organisation representing workers or of any organisation whose members are engaged in a specific occupation, including the rights and benefits conferred by such organisations, including the right to negotiate and conclude collective agreements, without prejudice to the national provisions on public policy and public security;‘