3. (1) There shall be, for the purposes of this Act, the following classes of non-agricultural tenants, namely:-(a) tenants, and(b) under-tenants. (2) “Tenant” means a person who has acquired from a proprietor or a tenure-holder a right to hold non-agricultural land for any of the purposes provided in this Act, and includes also the successors-in-interest of persons who have acquired such a right. (3) “Under-tenant” means a person who has acquired a right to hold non-agricultural land for any of the purposes provided in this Act either immediately or mediately under a tenant and includes also the successors-in-interest of persons who have acquired such a right.