In its first major ruling since being reconstituted by President Obama, the Democrat-controlled National Labor Relations Board (NLRB) has rejected the position of the NLRB's General Counsel and has determined that stationary bannering does not violate Section 8(b)(4)(B) of the National Labor Relations Act (NLRA). United Brotherhood of Carpenters Local Union No. 1506, 355 NLRB No. 159 (2010). This decision gives labor unions a powerful weapon: the ability to pressure a secondary (neutral) employer and its customers, in order to gain leverage over the primary employer with whom the union actually has its dispute. The facts in United Brotherhood illustrate the point below.

The Carpenters Union had primary labor disputes with four construction contractors in Arizona, claiming that the contractors failed to pay wages and benefits in accord with "area standards." In furtherance of its primary disputes, the Union protested at two hospitals and a restaurant, secondary employers with whom the Union had no primary dispute. The four construction contractors had engaged in construction work at the sites of the secondary employers.

Section 8(b)(4)(B) of the Act makes it an unfair labor practice for a union to "threaten, coerce, or restrain" a secondary employer where an object is to cause the secondary employer to cease doing business with the primary employer. At issue in United Brotherhood was whether the Union's conduct in "bannering" was the equivalent of picketing, which would have been clearly unlawful, or more like non-coercive peaceful "handbilling," which clearly would have been lawful.