The following excerpt is from Piccolo v. International Broth. of Elec. Workers, Local 206, 930 F.2d 29 (9th Cir. 1991):
It is clear from a review of the record that the state-law claim in this case cannot be resolved without interpreting the collective bargaining agreement. If resolution of the state-law claim depends upon the meaning of the collective bargaining agreement, application of state law is preempted by federal labor-law principles. Lingle v. Norge Division of Magic Chef, Inc., 486 U.S. 399, 405-06 (1988).
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