The National Labor Relations Board (NLRB) has explained the “past practice” analysis it applies in determining whether a unionized employer’s unilateral actions constitute an unlawful change under the NLRB’s decision in Raytheon Network Centric Systems, 365 NLRB No. 161 (2017). ABF Freight System, Inc., 369 NLRB No. 107 (June 19, 2020).

An employer violates…