Article 20A social market economy, based on the freedom of economic activity, private ownership, and solidarity, dialogue and cooperation between social partners, shall be the basis of the economic system of the Republic of Poland.Article 591. The freedom of association in trade unions, socio-occupational organizations of farmers, and in employers' organizations shall be ensured.2. Trade unions and employers and their organizations shall have the right to bargain, particularly for the purpose of resolving collective disputes, and to conclude collective labour agreements and other arrangements.3. Trade unions shall have the right to organize workers' strikes or other forms of protest subject to limitations specified by statute. For protection of the public interest, statutes may limit or forbid the conduct of strikes by specified categories of employees or in specific fields.4. The scope of freedom of association in trade unions and in employers' organizations may only be subject to such statutory limitations as are permissible in accordance with international agreements to which the Republic of Poland is a party.