Section 51 (Right to strike and prohibition of lock-out) 1. Every worker has the right to resort to strike, the exercise of which shall be regulated by law. 2. The law shall determine the conditions under which services are provided, during a strike, that are necessary for the safety and maintenance of equipment and facilities, as well as minimum services that are necessary to meet essential social needs. 3. Lock-out is prohibited. Section 52 (Trade union freedom) 1. Every worker has the right to form or join trade unions and professional associations in defence of his or her rights and interests. 2. Trade union freedom is sub-divided, namely, into freedom of establishment, freedom of membership and freedom of organisation and internal regulation. 3. Trade unions and trade union associations shall be independent of the State and the employers. Section 53 (Consumer rights) 1. Consumers have the right to goods and services of good quality, to truthful information and protection of their health, safety and economic interests, and to reparation for damages. 2. Advertising shall be regulated by law, and all forms of concealed, indirect or misleading advertising are prohibited. Section 54 (Right to private property) 1. Every individual has the right to private property and can transfer it during his or her lifetime or on death, in accordance with the law. 2. Private property should not be used to the detriment of its social purpose. 3. Requisitioning and expropriation of property for public purposes shall only take place following fair compensation in accordance with the law. 4. Only national citizens have the right to ownership of land.