Labour law (also known as employment or labor law) is the boy of laws, administrative rulings, and precedents which address the legal rights of, and restrictions on, working people and their organizations. As such, it mediates many aspects of the relationship between trade unions, employers and employees. In Canada, employment laws related to unionised workplaces are differentiated from those relating to particular individuals. In most countries however, no such distinction is made. However, there are two broad categories of labour law. First, collective labour law relates to the tripartite relationship between employee, employer and union. Second, individual labour law concerns employees' rights at work and through the contract for work. The labour movement has been instrumental in the enacting of laws protecting labour rights in the 19th and 20th centuries. Labour rights have been integral to the social and economic development since the industrial revolution.