1. Does a union carry its burden of proof on the work preservation defense to a secondary boycott claim by citing its members' work for any employer in the region?

2. Does Congress' "hot cargo" prohibition in 29 U.S.C. § 158(e) apply to union signatory terms interpreted within private arbitration and then imposed on non-parties?

3. Did the courts below err by creating an effective longshore exception to the 8(b)(4) and 8(e) prohibitions when the statutory text exempts only garment and construction industries?

4. Did Congress exclude from the National Labor Relations Act's secondary boycott protections those employers who rent their business premises?

Whether a union satisfies its burden of proof on the work preservation defense to a secondary boycott claim by citing its members' work for any employer in the region, and whether Congress' 'hot cargo' prohibition applies to union signatory terms interpreted in private arbitration and imposed on non-parties