The right of local authorities to set and collect rents on their dwellings is contained in section 58 of the Housing Act 1966. The making or amending of such schemes, subject to broad principles laid down by my Department, is an executive function and each local authority makes its own differential rent scheme.
The various differential rent schemes provide for rents that are linked to income. Tenants are required to notify their local authority of changes to their income so that the rent can be adjusted accordingly and local authorities also carry out periodic reviews of tenant incomes.
As I have no function in relation to the setting or reviewing of rents for individual local authority tenancies, my Department does not collate data on rent reviews that may be carried out by individual local authorities. Such information is available directly from the local authorities.