The constitution of 1976 confirmed the large and interventionist role of the state in the economy. Its Marxist character, which lasted until the 1982 and 1989 revisions, was revealed in a number of its articles, which pointed to a "classless society" and the "socialization of the means of production" and proclaimed all nationalizations made after 25 April 1974, as "irreversible conquests of the working classes". The constitution also defined new power relationships between labor and management, with a strong bias in favor of labor. All regulations with reference to layoffs, including collective redundancy, were circumscribed by Article 53.