( 1 ) PETITIONER who was a member of the Indian Administrative Service (IAS for short) was holding the post of Additional Chief Secretary to the Government of Gujarat Home Department when he was due to superannuate from service with effect from 17/11/1972 He was however granted six months extension in service and retired with effect from 17/05/1973 He was reemployed as Commissioner for Tourism from 18/05/1973 and worked as such upto 2/01/1974 Thereafter he was re-employed as Member-Secretary of the Administrative Reforms Committee from 24/01/197 4/07/1975 While the petitioner was employed as Member-Secretary of the Administrative Reforms Committee he also held charge of the post of Vigilance Commissioner. From 28/07/1975 the petitioner was re-employed as full-time Vigilance Commissioner which post he held till 10/09/1980 It is the case of the petitioner that during the period of his re-employment his pay was determined in accordance with the formula of last pay drawn minus pension including pension equivalent of Death-Cum-Retirement Gratutity (DCRG for short) which was determined at Rs. 239 per month. In the different posts in which the petitioner was re-employed af