Yes, depending on the status of the workers, there is collective dismissal if, for economic, technical, organisational or production reasons, the employer intends to lay off at least within 90 days: in accordance with Article 82, paragraph 3, of the status of workers, collective agreements that meet the legal requirements are mandatory for all employers and workers who are concerned by their scope and for the duration of their entry into force. The main ministry of social dialogue and working conditions is the Ministry of Labour, Migration and Social Security as well as the employment services of autonomous communities. The ministry plays an important role in promoting tripartite social dialogue. In addition, these institutions are responsible for the registration of collective agreements. After a collective agreement has been concluded, the signatories must submit the collective agreement to the government (the Ministry of Labour, if they are national authorities and the employment services of autonomous communities, if they are regional) within 15 days. Before registration, the authorities ensure that the content of the agreement complies with the legislation. If the collective agreement violates the law, the government can challenge it. How can employers change existing employment contracts? In the 1980s, industrial relations in Spain were affected by the political transition from dictatorship to democracy and by a process of industrial and economic modernization aimed at preparing the country for its integration into the European Community. In the early years of the transition period (1978-1982), trade unions accepted wage moderation in exchange for institutional recognition and the development of social rights and workers. He also called for some coordination and centralization of collective bargaining. The tariff structure, which has consolidated over the years, is still present today and is characterized by its multi-level nature, with negotiations taking place at the sectoral, provincial and operational levels. The 2012 labour market reform reduced the importance of these collective agreements. It is now possible to end these collective agreements by giving priority to enterprise agreements.

In the event of economic or technical difficulties related to the organisation or production, the company may waive the working conditions set by the industry collective agreement or by the applicable companies for all aspects related to working time, working time, the allocation of individual disputes; First, there are legal conflicts, i.e. conflicts over the interpretation of laws or the implementation of collective agreements. These disputes may be subject to legal proceedings initiated after the action has been presented by one of the parties, with a mandatory attempt at mediation at the administrative headquarters by conciliation bodies created by agreements between trade unions and employers` organisations. In 2010, the Socialist government authorized the change of wages in collective labour agreements to several employers through bargaining within the company. Under Act 10/2010, companies must consult with workers` representatives and negotiate the amendments within 15 days. If they fail to reach an agreement, they must apply for mediation procedures defined in multi-employer collective agreements.