Under both FIDIC Yellow Book (YB) and Silver Book (SB) (edition 1999), if the Engineer (YB) / Employer (SB) instructs the Contractor based on Sub-Clause 8.6 to provide a revised programme, the acceptance by the Engineer (YB) / Employer (SB) of a revised programme with a completion within Time of Completion entitles the Contractor to a payment of the needed extra costs. Is this statement true or false?