# The Non-Domestic Rating (Collection and Enforcement) (Central Lists) Regulations 1989, Paragraph 7


(1) The paragraph applies where the demand notice has been served on a ratepayer by the Secretary of State, any factor or assumption by reference to which the estimate made under regulation 6(1) for the purpose of the notice was calculated is shown to be false in respect of a day (“the relevant day”), and the event mentioned in paragraph 6(1) above has not occurred as regards the ratepayer.
(2) The Secretary of State shall on or as soon as practicable after the relevant day—
(a) serve a notice on the ratepayer which is to state the amount of the revised estimate mentioned in sub-paragraph (3), and
(b) adjust the instalments (if any) payable on or after the adjustment day (“the remaining instalments”) so that they accord with the amounts mentioned in sub-paragraph (4).
(3) The amount is the revised estimate of the Secretary of State of the amount payable for the relevant year made on the assumption mentioned in regulation 6(1) and as if the notice mentioned in that provision were the notice referred to in sub-paragraph (2) above.
(4) The aggregate amount of the remaining instalments payable shall be equal to the amount by which the revised estimate mentioned in sub-paragraph (3) exceeds the aggregate amount of the instalments payable under the demand notice before the adjustment day; and the amount of each remaining instalment (if there are more than one) shall be calculated in accordance with paragraph 1(4) and (5) as if references in those provisions to the aggregate amount and to instalments were references to the aggregate amount of the remaining instalments and to the remaining instalments respectively.
(5) If the revised estimate mentined in sub-paragraph (3) exceeds the aggregate amount of the instalments payable under the demand notice before the adjustment day, but no instalments are payable under it on or after that day, the amount of the excess shall be due from the ratepayer to the Secretary of State in a single instalment on the expiry of such period (being not less than 14 days) after the day of issue of the notice served under sub-paragraph (2) as is specified in it; and if in any case the revised estimate is less than the aggregate amount of the instalments payable before the adjustment day, any overpayment in respect of any liability of the ratepayer under these Regulations—
(a) shall be repaid if the ratepayer so requires, or
(b) in any other case shall (as the Secretary of State determines) either be repaid or credited against any subsequent liability of the ratepayer to pay anything to the Secretary of State by way of non-domestic rate.
(6) Where a notice has been given under sub-paragraph (2), in the operation of this paragraph as respects any further notice that may fall to be given under it, rerferences in this paragraph to the demand notice and to amounts in respect of instalments payable under it shall be construed (so far as the context permits) as references to the demand notice, and amounts in respect of instalments payable under the notice, as from time to time previously adjusted under this paragraph; and in calculating the aggregate amount of instalments payable under a demand notice before the adjustment day for the purposes of sub-paragraphs (4) and (5) in consequence of the calculation of the revised estimate mentioned in sub-paragraph (3), there shall not count as so payable any amount in respect of such instalments which has fallen to be repaid (or credited) under sub-paragraph (5) on the occasion of the giving of a pervious notice under sub-paragraph (2).
(7) In this paragraph “the adjustment day” means the day 14 days after the day the notice served under sub-paragraph (2) is issued.

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Source: https://www.legislation.gov.uk/uksi/1989/2260/schedule/paragraph/7 (the official version)
Page: https://openlegislation.uk/non-domestic-rating-collection-and-enforcement-central-lists-regulations-1989/schedule/paragraph-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.