The Water Undertakers (Rateable Values) Order 1989
Under paragraph 3(2) of Schedule 6 to the Local Government Finance Act 1988, the Secretary of State may by order provide in the case of non-domestic hereditaments to be shown in the central rating lists for England and for Wales that the normal rules of valuation for rating contained in paragraphs 2 to 2B of that Schedule are not to apply to such hereditaments, and instead their rateable value shall be such as is specified, or determined in accordance with rules set out, in the order.