Payments by local authorities to Scottish Water
4.—(1) Where a local authority is under an obligation to make payment to Scottish Water under article 3, it shall, within 14 days of the end of each calendar month in a relevant year, pay to Scottish Water on account of that obligation an amount calculated by reference to the formula referred to in paragraph (2) as applied at the end of the calendar month in question.
(2) The formula referred to in this paragraph is that set out in, or applied by, article 3 except that, for the purposes of this paragraph, F shall be replaced by—
(3) After the date when the last instalment payment under paragraph (1) falls due, a local authority shall make further instalment payments to Scottish Water on account of such an obligation as is referred to in that paragraph at such intervals as may be agreed between the local authority and Scottish Water or, failing agreement, as may be determined by the Scottish Ministers.
(4) This article is subject to article 5.