The relevant portion of sub s.(2) of section 13 of the Act is: "(2) Where any premises or any part thereof have been or has been sub let by 'a tenant of the first degree ' or by a tenant inferior to a tenant of the first degree ', as defined in explanation to sub section (1), and the sub lease is binding on the landlord of such last mentioned tenant, if the tenancy of such tenant in either case is lawfully determined otherwise than by virtue of a decree in a suit obtained by the landlord by reason of any of the grounds specified in clause (h) of the proviso to sub section (1) of section 12, the sub lessee shall be deemed to be a tenant in respect of such premises or part, as the case may be, holding directly under the landlord of the tenant whose tenancy has been determined, on terms and conditions on which the sub lessee would have held under the tenant if the tenancy of the latter had not been so determined.