613 A.2d 155 UNITED ASSOCIATION OF JOURNEYMEN AND APPRENTICES OF the PLUMBING AND PIPEFITTING INDUSTRY OF the UNITED STATES AND CANADA, STEAMFITTERS LOCAL 449, AFL-CIO, Petitioner, v. PENNSYLVANIA LABOR RELATIONS BOARD, Respondent. Commonwealth Court of Pennsylvania.Argued May 12, 1992. Decided July 27, 1992. Appeal from the Labor Relations Board, No. PERA-C-89-566-W. Page 412 [EDITORS’ NOTE: […]