29 U.S.C. § 101 — Issuance of restraining orders and injunctions; limitation; public policy

This section limits when federal courts can step into labor disputes. No United States court, as this chapter defines "court," has the power to issue a restraining order or a temporary or permanent injunction in a case involving or arising from a labor dispute — unless it does so in strict compliance with the rules this chapter lays out. In addition, no such restraining order or injunction may be issued if it goes against the public policy this chapter declares. In short: federal courts can only block labor-dispute actions through the narrow, specific procedure and policy this chapter sets, not through their ordinary injunction powers.