531 U.S. 57 (2000)
Eastern Associated Coal Corp. v.
Does enforcing a labor arbitrator's award that conditionally reinstates a commercial truck driver who twice tested positive for marijuana violate an explicit, well-defined, and dominant public policy derived from laws and legal precedents, particularly DOT safety regulations?
Courts must enforce labor arbitration awards so long as the arbitrator is arguably construing or applying the collective bargaining agreement, even if a court would have reached a different result. A court may refuse to enforce an award on public policy grounds only if the award itself violates an explicit, well-defined, and dominant public policy ascertained by reference to statutes, regulations, and legal precedents—not by general considerations of supposed public interests. See United Paperworkers Int'l Union v. Misco, Inc., 484 U.S. 29 (1987); W.R. Grace & Co. v. Local 759, 461 U.S. 757 (1983). The inquiry focuses on whether the remedy ordered conflicts with positive law or requires unlawful conduct, not whether the employee's underlying misconduct offends general policy.
No. Enforcing the arbitrator's conditional reinstatement did not violate any explicit, well-defined, and dominant public policy. DOT regulations do not mandate discharge for positive drug tests; they expressly contemplate rehabilitation, return-to-duty testing, and follow-up testing. The judgment enforcing the award was affirmed.
The decision reinforces the extreme narrowness of the public policy exception to enforcement of labor arbitration awards. It clarifies that courts must identify a concrete, positive-law prohibition that the award would violate before refusing enforcement; generalized safety concerns or disagreement with the arbitrator's judgment are not enough. For practitioners, Eastern Associated Coal underscores the importance of crafting and honoring last-chance agreements and conditional reinstatement remedies, even in highly regulated, safety-sensitive industries. For students, it is a leading case—alongside Misco and W.R. Grace—on the relationship between arbitration, judicial review, and the contours of the public policy exception.