Answer: National Labor Relations Act
Explanation:
Passed in 1935, this is a fundamental act in United States Labor law that grants private sector employees the right to join Unions and engage with employers in Collective Bargaining to better their employment conditions. This act even gave the employees the right to strike if their demands are not meant.
Most relevant is that in Section 8 of the Act, it is made clear that when an Employer refuses to engage in Collective Bargaining with the representative of their employees, that this is an unfair labor practice and under the Act, is considered to be illegal.
