Unfair labor practice

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An unfair labor practice (ULP) in United States labor law refers to certain actions taken by employers or unions that violate the National Labor Relations Act of 1935 (49 Stat. 449) 29 U.S.C. § 151–169 (also known as the NLRA and the Wagner Act after NY Senator Robert F. Wagner^[1]) and other legislation. Such acts are investigated by the National Labor Relations Board (NLRB).^[2]