“common parts”, in relation to a dwelling-house let under a tenancy, means any part of a building comprising the dwelling-house and any other premises which the tenant is entitled under the terms of the tenancy to use in common with the occupiers of other dwelling-houses let by the landlord;

“housing purposes” means the purposes for which dwelling-houses are held by local housing authorities under Part II (provision of housing) or purposes corresponding to those purposes;

“rental period” means a period in respect of which a payment of rent falls to be made;

“term”, in relation to a secure tenancy, includes a condition of the tenancy.