The Norris-LaGuardia Act (29 U.S.C.A. § 101 et seq.) is one of the initial federal LABOR LAWS in favor of organized labor. It was enacted in 1932 to provide that contracts that limit an employee's right to join a LABOR UNION are unlawful. Such contracts are commonly known as YELLOW DOG CONTRACTS. Initially the law was known as the anti-injunction act since its numerous restrictions had the effect of stopping any federal court from issuing an INJUNCTION to end a labor dispute. In one part of the act, for example, there is a provision that an injunction prohibiting a strike cannot be issued unless the local police are either unwilling or unable to prevent damage or violence.