parks textbook of preventive and social medicine 23rd edition. *as per scheme ,Rajiv gandhi shramik kalyam yojna ,an insured person going out of insurable employment involuntarily ,on account of closure of a factory or establishment ,retrenchment,or permanent invalidity arising out of non-employment injury ,after rendering insurable employment and having contributed under the scheme for five or more years, is entitled to claim unemployment allowance for maximum period of 6months during his/her entire service .