17.3 Public Highway Works
Where the Authority proposes to undertake or procure the undertaking of any works within or about the Public Highway and in the Authority's view (acting reasonably) such works could not have reasonably been foreseen by the Service Provider and incorporated in the relevant Investment Programme pursuant to clause 12.2 (The Core Investment Programme) or clause 12.4 (The Annual Investment Programme) or clause 12.5 (Amendment of Investment Programmes) and are likely to cause a direct material obstruction to or interference with the Service Provider's ability to perform its obligations in accordance with this Contract (the Relevant Highway Works) the Authority shall:
(a) issue a notice to the Service Provider at least five (5) Business Days (or otherwise as is reasonable given the nature and scale of the Relevant Highway Works) prior to the commencement of such works;
(b) specify in the notice referred to in clause 17.3(a):
(i) the Apparatus which will be affected;
(ii) the date upon which the Relevant Highway Works are due to commence (the Temporary Suspension Start Date); and
(iii) a reasonable estimate of the date on which the Relevant Highway Works will conclude (the Temporary Suspension End Date) which period may be extended or reduced as the Authority considers reasonable in all the circumstances by a further written notice given as soon as reasonably practicable to the Service Provider.