Some time in 1952, there was a dispute between the management of 32 mills in Coimbatore and the workmen employed therein in regard to the bonus payable to the latter for the years, 1949, 1950 and 1951. By G. O. Ms. No. 2019 dated 9th May, 1952, the State Government referred the dispute for adjudication to the Industrial Tribunal, Coimbatore, constituted under section 7 of Act XIV of 1947. The Industrial Tribunal took on file the dispute as I.D. No. 13 of 1952 and issued notices to the Secretary of the Coimbatore District Textile Workers’ Union arid to the Honorary Secretary, the South Indian Mill Owners’ Association Coimbatore, the parties mentioned in the Government Order, requiring them to file their respective statements in connection with the dispute. The Government communicated a copy of the G. O. to three other Unions, namely, the Coimbatore District Textile Mills’ Staff Union, the Coimbatore District Textile Jobbers’ Union and the National Textile Workers’ Union. The notices were issued to those Unions as well by the Industrial Tribunal. No notice was, however, given to the petitioner namely, the District Mill Workers’ Union, Coimbatore, although they had participated