29.—Where, the tenancy of a tenement having terminated before the commencement of this Act, the tenant is at such commencement in possession of the tenement under a tenancy arising by implication from the acts of the parties or under a statutory tenancy under the Rents Restrictions Acts, 1960 and 1967, or as a tenant at will or otherwise, without having obtained a new tenancy, the tenancy shall for the purposes of this Act be deemed to terminate immediately after such commencement and this Act shall apply accordingly.