Paragraph 10 Commuted sumsI1

Prior to the commencement of each phase of the highway works the undertaker is to be provided with an estimate of the amount of the commuted sum in respect of the maintenance costs of that phase of the highway works to be incurred following the issue of the final certificate, if any and following completion of that phase of the highway works the undertaker must pay to Highways England the commuted sum within 28 days of the date of the final certificate. The commuted sum must be calculated in line with FS Guidance S278 Commuted Lump Sum Calculation Method dated 18th January 2010, except that—

If the form of any structures referred to in sub-paragraph (1)(a) and (b) changes significantly from that contained in the approval in principle already submitted to and approved by Highways England then the calculation of the figure in sub-paragraph (1)(a) or (b) as the case may be must, if requested by either the undertaker or Highways England, be recalculated in accordance with the FS Guidance S278 Commuted Lump Sum Calculation Method dated 18th January 2010.