The Norris–La Guardia Act (also known as the Anti-Injunction Bill) is a 1932 United States federal law relating to United States labor law. It banned yellow-dog contracts, barred the federal courts from issuing injunctions against nonviolent labor disputes, and created a positive right of noninterference by employers against workers joining trade unions. The common title comes from the names of the sponsors of the legislation: Senator George W. Norris of Nebraska and Representative Fiorello H. La Guardia of New York, both Republicans.