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The FIDIC Orange Book 1995: Design-Build and Turnkey Contracts

Published in 1995 as the first FIDIC form drafted in the modern style, the Orange Book introduced single-point design liability to the FIDIC suite. It has been largely superseded by the 1999 Yellow and Silver Books, but understanding it remains relevant for legacy contracts and for tracing the development of the FIDIC drafting approach.

8 min read · Updated 23/04/2026

In this article

1. What the Orange Book is and where it fits
2. Scope: design-build and turnkey projects
3. Structure of the Orange Book
4. Single-point design liability
5. Extension of Time under the Orange Book
6. Why the 1999 suite largely replaced the Orange Book
7. When the Orange Book may still apply

Key takeaway

The Orange Book 1995 was the first FIDIC form to adopt single-point design liability and the drafting style later used in the 1999 suite. For new UAE projects, the 1999 Yellow Book (design-build) or Silver Book (EPC/turnkey) is almost always the appropriate choice. The Orange Book remains relevant where legacy contracts are still in dispute or where a bespoke form has imported its language.

1. What the Orange Book is and where it fits

The FIDIC Orange Book — formally, the Conditions of Contract for Design-Build and Turnkey, First Edition 1995 — was published to fill a gap in the FIDIC suite. At the time, the Red Book addressed civil engineering works designed by the Employer, and the Yellow Book addressed electrical and mechanical works including erection on site. Neither was drafted for projects where the Contractor takes full responsibility for both design and construction.

Two features make the Orange Book historically important. First, it was the first FIDIC form drafted in what became known as the modern FIDIC style — plain English clauses, numbered Sub-Clauses, and clear separation between General Conditions and Particular Conditions. Second, it served as the drafting template for the 1999 Yellow and Silver Books. Practitioners who read the Orange Book and the 1999 Yellow Book side by side will recognise the structural and linguistic similarity.

2. Scope: design-build and turnkey projects

The Orange Book covers two procurement models within a single form:

• Design-build, where the Contractor designs and constructs the works in accordance with the Employer’s requirements. The works may include any combination of civil, mechanical, electrical and building works.
• Turnkey, where the Employer’s requirements extend to the provision of a fully equipped facility ready for operation on handover. The Contractor is responsible for design, construction, fixtures, fittings and equipment.

Under both models, administration is carried out by an Engineer employed by the Employer. The Engineer issues instructions, certifies payments, and determines questions arising under the contract. Interim payments of the lump-sum Contract Price are made as work proceeds, typically against milestones set out in a payment schedule.

3. Structure of the Orange Book

The Orange Book is organised in four parts, a structure preserved in the 1999 successor forms:

The Particular Conditions are where most disputes originate on Orange Book contracts. Where the Employer has inserted bespoke risk-transfer provisions — frequently on UAE projects of the 1990s and early 2000s — the balance of the General Conditions may be materially altered. A claim analysis on an Orange Book contract always begins with a careful read of Part 2.

4. Single-point design liability

The defining feature of the Orange Book is single-point design liability. The Contractor carries total responsibility for the design of the works — including the sufficiency of the Employer’s requirements as a design brief, subject to the usual qualifications concerning data supplied by the Employer.

For the Employer, single-point liability has two advantages. First, it simplifies the contract chain: there is one party to pursue for any design or construction defect. Second, it transfers design risk to the party best placed to price and manage it during execution.

The counterbalance is that the Employer loses direct control over the design process. Design development happens within the Contractor’s organisation or its consultants, not through instructions issued by the Engineer. Employer-initiated changes to the Employer’s Requirements attract variations and may alter the Contract Price materially.

In UAE practice, single-point liability under the Orange Book has been particularly significant in relation to ground conditions and fit-out specifications. Where the Employer has provided site investigation data at tender, the Contractor generally takes the risk of site conditions being as the data indicates. Where the Employer’s Requirements are imprecise on fit-out standards, post-contract disputes over what was included in the lump sum are common.

5. Extension of Time under the Orange Book

The Orange Book addresses Extension of Time through Sub-Clause 8.3, which entitles the Contractor to an extension where completion is or will be delayed by:

• A variation instructed by the Engineer.
• A cause of delay giving entitlement to extension under the Conditions.
• Exceptionally adverse climatic conditions.
• Unforeseeable shortages of personnel or goods caused by epidemic or government action.
• Any delay, impediment or prevention caused by or attributable to the Employer.

These grounds are substantially the same as those later incorporated into Sub-Clause 8.4 of the 1999 Yellow Book. The notice procedure under Sub-Clause 20.1 requires the Contractor to give notice of any claim, whether for time or money, not later than 28 days after becoming aware of the event or circumstance. Full supporting particulars follow within 42 days of the occurrence of the event. The consequences of failure to give timely notice mirror those under the 1999 Conditions.

Assessment of delay proceeds by reference to the Programme submitted under Sub-Clause 7.2. The quality of the Programme — whether it identifies the critical path and has been properly updated — materially affects the tribunal’s ability to assess an EOT claim on an Orange Book contract. Delay analysis on older Orange Book matters often begins with reconstructing a defensible Programme from the available records.

6. Why the 1999 suite largely replaced the Orange Book

When FIDIC published the 1999 suite — the Red Book, the Yellow Book, the Silver Book and the Green Book — the Orange Book was not formally withdrawn, but its practical role contracted sharply. Three reasons explain the shift:

• Split between design-build and EPC/turnkey. The Orange Book combined both models in a single document. The 1999 suite separated them: the Yellow Book for design-build, the Silver Book for EPC/turnkey. Each form is drafted for its target procurement route rather than as a compromise.
• Different risk profiles. The Silver Book allocates more risk to the Contractor than the Orange Book did — reflecting the privately financed BOT and PPP context for which it was drafted. The Yellow Book retains the more balanced allocation familiar from FIDIC’s traditional drafting.
• Updated dispute resolution. The 1999 suite introduced the Dispute Adjudication Board as the first-instance dispute forum, replacing the Engineer’s decision under Clause 67 of the old Red and Yellow Books. The 2017 Conditions took this further with the standing DAAB.

For new procurement in the UAE, the question is typically between the 1999 or 2017 Yellow Book and the 1999 or 2017 Silver Book. The Orange Book is no longer recommended as a starting point. The choice between Yellow and Silver turns on the intended risk allocation, the financing structure, and the Employer’s appetite for Contractor freedom on design.

7. When the Orange Book may still apply

Despite its reduced role in new procurement, Orange Book issues continue to arise on UAE projects in three scenarios:

For current procurement — a new hotel, a new industrial facility, a new transport project — the Orange Book is not the answer. Our FIDIC advisory work on new UAE projects focuses on the 1999 and 2017 suites, with the Orange Book relevant only where legacy issues bring it into play.

This article provides general information on the FIDIC Orange Book and is not legal advice. For jurisdiction-specific matters under UAE law, a UAE-qualified legal practitioner should be consulted.

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Whether the matter is a legacy Orange Book dispute, a bespoke form derived from it, or a new project where the right starting point needs to be chosen, E-Basel provides expert input on FIDIC contracts across the suite.

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