Several months ago, the Client/Engineer instructed the Contractor to install Heras panels around a compound, which was not part of the original scope of work. The Contractor purchased the fencing and installed it, and has since been charging the client hire fees based on CECA rates. The Engineer now claims that the hire arrangement is too expensive and has directed the Contractor to purchase the fencing and stop hiring it from them.Can the Client/Engineer under FIDIC force the contractor to stop hiring the fencing to them?