CERTIORARI TO THE SUPREME COURT OF FLORIDA.
Brennan, J., delivered the opinion for a unanimous Court.
MR. JUSTICE BRENNAN delivered the opinion of the Court.
The Florida Supreme Court held that the Florida District Court of Appeal erred in refusing to issue a writ of prohibition to restrain the Circuit Court for Duval County from exercising its jurisdiction over a suit within the purview of § 301 of the Labor Management Relations Act (LMRA).*fn1 The suit sought to enjoin respondent unions' breach of a no-strike clause contained in a
collective-bargaining agreement, which breach arguably is also an unfair labor practice under the Act. The State Supreme Court stated: "It is unquestionable that state courts do have jurisdiction to enforce a collective-bargaining agreement and to enjoin a strike in violation of a 'no-strike' clause contained therein, but not when the strike is also arguably an unfair labor practice prohibited by federal law." 279 So. 2d 300, 302 (1973). We granted certiorari to decide whether the holding of the Florida Supreme Court was consistent with decisions of this Court, including Teamsters Local v. Lucas Flour Co., 369 U.S. 95 (1962), and Smith v. Evening News Assn., 371 U.S. 195 (1962). 414 U.S. 1063 (1973). We reverse.
Article VI of a collective-bargaining agreement between petitioner, William E. Arnold Co., and respondents, Carpenters District Council of Jacksonville and Vicinity and its affiliate, Local 627 (Carpenters), provides:
"There shall be no work stoppage, slowdown, work cessation or strike because of a Jurisdictional Dispute. A mutually agreeable settlement, or joint decision of the International Unions involved, or decision or interpretation of the National Joint Board for the Settlement of Jurisdictional Disputes (or Hearing Panel) shall be binding and all parties agree to accept such decision or interpretation."
In 1971, during the construction of the Jacksonville General Hospital, one of Arnold's subcontractors assigned work claimed by the Carpenters to the Wood, Wire and Metal Lathers International Union, AFL-CIO, Local 59. The Carpenters struck Arnold to force reassignment of the work to their members. Arnold thereupon brought this suit in the Circuit Court of Duval County to enjoin the Carpenters from violating the provisions of
Art. VI and obtained a temporary restraining order prohibiting the strike. The Carpenters then sought a writ of prohibition from a Florida District Court of Appeal, contending that the Circuit Court lacked jurisdiction to order injunctive relief because the alleged breach of the no-strike clause was also arguably an unfair labor practice under § 8 (b)(4)(i)(D) of the National Labor Relations Act (NLRA), 29 U. S. C. § 158 (b)(4)(i)(D),*fn2 and therefore fell within the exclusive jurisdiction of the National Labor Relations Board (Board). The District Court of Appeal denied the writ of prohibition and, as previously mentioned, the Supreme Court of Florida reversed.
When an activity is either arguably protected by § 7 or arguably prohibited by § 8 of the NLRA, the preemption doctrine developed in San Diego Building Trades Council v. Garmon, 359 U.S. 236 (1959), and its progeny, teaches that ordinarily "the States as ...