The National Labor Relations Act (or Wagner Act) is a 1935 Unite States federal law that protects the rights of most workers in the private sector to organize labor unions, to engage in collective bargaining, and to take part in strikes and other forms of concerted activity in support of their demands. The Act does not, on the other hand, cover those workers who are covered by the Railway Labor Act, agricultural employees, domestic employees, supervisors, independent contractors and some close relatives of individual employers.