(March 7, 2017, 12:40 PM EST) -- ST. LOUIS — An employer’s challenge of the National Labor Relations Board’s (NLRB) decision to follow the standard approach established in Wright Line, 251 N.L.R.B. 1083, 1089 (1980), in the Eighth Circuit U.S. Court of Appeals is barred after it failed to raise a challenge before the board, an Eighth Circuit panel ruled March 6 (National Labor Relations Board, et al. v. Chipotle Services, LLC, a wholly owned subsidiary of Chipotle Mexican Grill, Inc., No. 15-3925, Chipotle Services, LLC, a wholly owned subsidiary of Chipotle Mexican Grill, Inc. v. National Labor Relations Board, et al., No. 15-3955, 8th Cir., 2017 U.S. App. LEXIS 3918)....