Therein the definition of 'Tenant ' was amended by Section 3(ii) of the Amendment Act introducing to Section 3 Clause (vii), thus: "(vii) "tenant" means (a) The person by whom or on whose account or behalf rent is, or, but for a contract express or implied, would be payable for any premises to his landlord including the person who is continuing in its possession after the termi nation of his tenancy otherwise than by a decree for evic tion passed under the provisions of this Act; and 10 (b) In the event of death of the person as is referred to in sub clause (a), his surviving spouse, son, daughter and other heir in accordance with the personal law applica ble to him who had been, in the case of premises leased out for residential purposes, ordinarily residing and in the case of premises leased out for commercial or business purposes, ordinarily carrying on business with him in such premises as member of his family upto his death.