Dealers who (a) hold certificate (a) 3 years in The dealer speci of registration under the case of an fied in column (1) the M.P.General Sales Industry loca shall produce be Tax 1958 (No.2 of ted in any of fore the assessing 1959); the tehsils of authority at the a district spe time of his assess fied in part I ment a certificate of the Annexure; issued by the Direc tor of Industries, Madhya Pradesh or any (b) are registered (b) 5 years in officer authorised by as industrial units the case of an him for the purpose with the Director industry located of certifying that General of Technical in any of the the dealer is eligi Development or by any tehsils of a ble to claim such authority duly em a district spe exemption under the powered to do so by cified in cate scheme of the Indus State or Central gory `A ' of Part tries.