d) To take part in drawing up labour legislation and economic and social plans that address their sector; e) To manage or participate in the management of their enterprise’s social activities; f) To promote the election of workers’ representatives to the governing bodies of enterprises that belong to the state or other public entities, as laid down by law. Article 55 (Freedoms concerning trade unions) 1. Workers are accorded the freedom to form, belong to and operate trade unions as a condition and guarantee of the building of their unity in defence of their rights and interests. 2. In exercising the freedom to form, belong to and operate trade unions, workers are particularly guaranteed the following, without any discrimination: a) The freedom to form trade unions at every level; b) Freedom of membership, and no worker may be obliged to pay dues to a union to which he does not belong; c) The freedom to decide the organisation and internal regulations of trade unions; d) The right to engage in trade union activities in their enterprise; e) The right to political views, in the forms laid down by the respective by-laws. 3. Trade unions must be governed by the principles of democratic organisation and management, to be based on the periodic election of their governing bodies by secret ballot, without the need for any authorisation or homologation, and to be founded on active worker participation in every aspect of trade union activity. 4. Trade unions shall be independent of employers, the state, religious beliefs, and parties and other political associations, and the law must lay down the guarantees that are appropriate to that independence, which is fundamental to the unity of the working classes. 5. Trade unions have the right to establish relations with or join international trade union organisations. 6. Workers’ elected representatives enjoy the right to be informed and consulted, as well as to adequate legal protection against any form of subjection to conditions, constraints or limitations on the legitimate exercise of their functions. Article 56 (Trade union rights and collective agreements) 1. Trade unions have the competence to defend and promote the defence of the rights and interests of the workers they represent. 2. Trade unions have the right: a) To take part in drawing up labour legislation; b) To take part in the management of social security institutions and other organisations that seek to fulfil workers’ interests;