In its latest legal defeat, the National Labor Relations Board was slapped down Wednesday by the District of Columbia Circuit Court of Appeals in a bid to revive its so-called “poster” ruling. A similar appeal by the NLRB to the Fourth Circuit Court was also struck down Aug. 12.

The rule, which the NLRB adopted in 2011, would have required all businesses to prominently place posters in the workplace explaining workers’ rights to join a union.