14.—(1) This Part also applies to premises which, immediately before the commencement of the Rent Restrictions Act, 1960, comprised controlled business premises under the Rent Restrictions Act, 1946, the letting of which was not—

(a) a letting made and expressed to be made for the temporary convenience of the landlord or of the tenant and (if made after the passing of the Act of 1931) stating the nature of the temporary convenience, or

(b) a letting made for or dependent on the continuance of the tenant in any office, employment or appointment.

(2) Where the premises were, immediately before the commencement of the Rent Restrictions Act, 1960, held under a statutory tenancy, the tenant under that tenancy shall, on and after such commencement, be deemed to hold the premises from the landlord under a tenancy having the same terms and conditions as the statutory tenancy except that the landlord may, by not less than three months' notice to quit (expiring on any day specified in that behalf in the notice) served on the tenant, determine the tenancy.