For the removal of doubts, it is hereby declared that, (a) where, by reason of Explanation II, the right of any successor to continue in possession after 28 the termination of the tenancy becomes extinguished, such extinguishment shall not affect the right of any other successor of the same category to continue in possession after the termination of the tenancy; but if there is no other successor of the same category, the right to continue in possession after the termination of the tenancy shall not, on such extinguishment pass on to any other successor, specified in any lower category or categories, as the case may be ; (b) the right of every successor, referred to in Explanation I, to continue in possession after the termination of the tenancy, shall be personal to him and shall not, on the death of such successor, devolve on any of his heirs ;" The definition of tenant as it stands at present in the Act, is after the amendment of the definition in section 2(1) of the earlier Act, by the Amendment Act (Act 18 of 1976) which was introduced with retrospective effect.