The Act defines " landlord " to mean " any person who is for the time being, receiving, or entitled to receive, rent in respect of any premises whether on his own account or on account, or on behalf, or for the benefit of any other person or as a trustee, guardian, or receiver for any other person or who would so receive the rent or be entitled to receive the rent if the premises were let to a tenant ; and includes any person not being a tenant who from time to time derives title under a landlord; and further includes in respect of his subtenant a tenant who has sublet any premises " and " tenant " to mean " any person by whom or on whose account rent is payable for any premises and includes (a) such subtenants and other persons as have derived title under a tenant before the coming into operation of this Act, (a) any person to whom interest in premises has been transferred under the proviso to section 15, (b) any person remaining, after the determination of the lease, in possession, with or without the assent of the landlord, of the premises leased to such person or his predecessor who has derived title before the coming into operation of this Act, (c) any member of the tenant 's family residing with him at the time of his death as may be decided in default of agreement by the Court.