the contractor shall commence the works on site within fifteen days of signing the contract， but in any event， not later than two months. the contractor shall commence the work with due expedition and without delay， except as may be expressly sanctioned or ordered by the employer， or be wholly beyond the contractor''s control.
save insofar as the contract may be prescribed， the extent of portions of the site of which the contractor is to be given possession from time to time and the order in which such portions shall be made available to him and， subject to any requirement in the contract as to the order in which the works shall be executed， the employer will give to the contractor possession of so much of the site as may be required to enable the contractor to commence and proceed with the execution of the works in accordance with the agreed program. if the contractor suffers delay or incurs cost from failure on the part of the employer to give possession， the employer shall grant an extension of time for the completion of the works and certify such sum as， in his opinion， shall be fair to cover the cost incurred.
the contractor shall bear all costs and charges for special or temporary wayleaves required by him in connection with access to the site.the contractor shall also provide at his own cost any additi ional accommodation outside the site required by him for the purposes of the works.
to any requirement in the contract as to completion of any section of the works before completion of the whole， the whole of the works shall be completed''， in accordance with the proccesions of 4 （2） hereof.23 extension of time for completion
should the amount of extra or additional work of any kind or any cause of delay referred to in these conditions， or exceptional adverse climatic conditions， or their special circumstances of any kind whatsoever which may occur， other than through a default of the contractor， be such as fairly to entitle the contrac - tor to an extension of time for the completion of the works the employer shall determine the amount of such extension and shall notify the contractor accordingly.24 rate of progress
if for any reason， which does not entitle the contractor to an extension of time， the rate of progress of the works or any section is at any time， in the opinion of the employer， too slow to ensure completion by the prescribed time or extended time for completion， the employer shall so notify the contractor in writing and the contractor shall thereupon take such steps as are necessary and the employer may approve to expedite progress so as to complete the works or such section by the prescribed time or extended time.the contractor shall not be entitled to any ad - ditional payment for taking such steps.25 liquidated damages for delay