In this Chapter, unless otherwise expressly provided—
“co-operative housing association” has the meaning given in section 300(1)(b) of the 1987 Act,
“court” means the sheriff court for the district in which is situated the house to which the tenancy in question relates, and “proceedings” means proceedings in that court,
“landlord” means a person who lets a house to a tenant for human habitation, and includes any person from time to time deriving title under the original landlord,
“notice” means notice in writing,
“tenancy” means an agreement under which a house is made available for human habitation, and “lease” and related expressions are to be construed accordingly,
“tenant” means a person who leases a house from a landlord and whose right in the house derives directly from the landlord, and in the case of a joint tenancy means all the tenants.