The majority of FIDIC-based contracts use the Red Book (Conditions of Contract for Construction), so this book concentrates on the use of those particular forms. Supplementary comments are included in Appendix C for the Yellow Book (Plant & Design-Build) recommended for use where the contractor has a design responsibility. The Contractor is represented on site by the Contractor’s Representative who carries the overall responsibility for all the Contractor’s on-site activities. In order to provide guidance to the Contractor’s Representative and his staff, this book is divided into five sections: The guide is not intended to be a review of the legal aspects of FIDIC- based contracts; legal advice should be obtained as and when necessary, particularly if the Contractor has little or no knowledge of the local law. Armed on site with a copy of The Contractor and the FIDIC Contract, the Contractor’s Representative will be more able to avoid contractual problems rather than spend considerable time and energy resolving those problems once they have arisen.