Nos. 98-1892, 98-2017. Argued January 27, 1999. Decided September 11, 2001. ARGUED: Robert Lewis, Jackson, Lewis, Schnitzler Krupman, Woodbury, NY, for Weis Markets. Robert Paul Joy, Morgan, Brown Joy, Boston, MA, for Amicus Curiae. Julie Brock Broido, Senior Attorney, National Labor Relations Board, Washington, DC, for Board. Carey Robert Butsavage, Butsavage Associates, P.C., Washington, DC, for Intervenor. ON BRIEF: Roger S. Kaplan, Steven I. Farbman, Jackson, Lewis, Schnitzler Krupman, Woodbury