Ministry of Labour - Industrial Dispute between Mr. J. R. Jayatunga Vs. Sri Lanka Transport Board, A. D. Sumanasiri Vs. China National Technical Import & Export Corporation and Resources Development Consultants Limited., Mr. W. A. Wijedasa Vs. Sri Lanka Transport Board, and Mrs. G. G. M. Karunaratne and Mrs. L. L. D. Liyanwala Vs. Janatha Estates Development Board