Schedule 6 to the Local Government Finance Act 1988 provides for the valuation of hereditaments. Where an alteration is to be made to the rateable value for a hereditament shown on a rating list, the matters mentioned in paragraph 2(7) of that Schedule are taken to be as they are assumed to be on the material day. The Non-Domestic Rating (Material Day for List Alterations) Regulations 1992 prescribes the rules under which the material day is to be determined.