Local Government Act 1993

A council must not make rates and charges for a year so as to produce general income of an amount that exceeds the notional general income of the council for the previous year as varied by the percentage (if any) applicable to the council under section 506, 508(2) or 508A for the year for which the rates and charges are made, except as provided by section 511 or 511A.

The notional general income of a council for the previous year is the amount that would have been derived if the same rates and charges as were made to produce the general income for that previous year had been so made but, in the case of rates, had been made in respect of—

the valuations of rateable land in the council’s valuation record applicable as at 1 July in that previous year and required under this Act to be used in that previous year for the making and levying of rates (not including valuations of those parcels of rateable land for which supplementary valuations referred to in paragraph (b) have been furnished), and

supplementary valuations of rateable land having the same base date as those valuations and furnished to the council under the Valuation of Land Act 1916 during that previous year, and

any estimates of increase in value of rateable land that are provided to the council under section 513 in respect of that previous year.