( 1 ) THE short question which arises before us is whether the decision in NAGRI MILLS LTD. V. TEXTILE LABOUR ASSOCIATION AHMEDABAD 12 G. L. R. 417 which has unsettled the industrial law for a decade on this Question of limitation under sec. 79 (4) of the Bombay Industrial Relations Act 1946 hereinafter referred to as the Act in respect of continuing illegal change is correctly decided. The Textile Labour Association a representative union has come up in this petition under Article 227 of the Constitution of India challenging the decision of the Industrial Court dated October 23 1974 dismissing the four applications which were filed by this representative union on behalf of the four concerned permanent watchmen working in the respondent mill company for a declaration of illegal change as being time-barred. The concerned watchmen were made permanent on April 10 1967 May 1 1968 August 1 1968 and May 1 1968 respectively and on the ground of the customary concession of amenity in the form of an allowance of Rs. 4=50 P per month in lieu of house rent with additional fuel and kerosene which had been denied to them from the date of their permanance the claim was made that t