Labor law (also labor law or employment law) mediates the relationship between workers (employees), employers, trade unions and the government. Collective labor law relates to the tripartite relationship between employee, employer and union. Individual labor law concerns employees’ rights at work and through the contract for work. Employment standards are social norms (in some cases also technical standards) for the minimum socially acceptable conditions under which employees or contractors are allowed to work. Government agencies (such as the former U.S. Employment Standards Administration) enforce labor law (legislative, regulatory, or judicial).