10/01/2026
🏗️ Mastering FIDIC 2017 Red Book:
📘 FIDIC 2017 Red Book | Sub-Clause 1.4 – Law and Language
Sub-Clause 1.4 lays down the fundamental legal and linguistic framework of the Contract. It eliminates uncertainty by clearly identifying which law governs the Contract and which language prevails in all contractual documents and communications—an essential safeguard for enforceability, consistency, and effective contract administration.
This Sub-Clause is structured around three key pillars:
1️⃣ Governing Law
Primary Rule: The Contract shall be governed by the law of the country or jurisdiction expressly stated in the Contract Data.
Default Rule: Where no governing law is stated, the applicable law shall be the law of the Country in which the Site is located and the Permanent Works are executed.
Legal Limitation: The governing law applies to the exclusion of conflict of laws rules, preventing indirect reference to another legal system and closing potential legal loopholes.
2️⃣ Ruling Language
Definitive Version: The ruling language is that stated in the Contract Data. If none is stated, it defaults to the language in which the Conditions of Contract are written.
Precedence: Where Contract documents are issued in more than one language, the version in the ruling language shall prevail in the event of any inconsistency—an essential principle supporting the Priority of Documents under Sub-Clause 1.5.
3️⃣ Language for Communications
Standard for Interaction: All Notices and other communications (as defined under Sub-Clause 1.3) shall be issued in the language stated in the Contract Data.
Default Setting: If no language is specified, communications shall be in the ruling language of the Contract.
Personnel Requirement: The importance of this obligation is reinforced by requiring the Engineer, the Contractor’s Representative, and Key Personnel to be fluent in the designated language to ensure effective management, coordination, and safety.
🔍 The Bottom Line
Sub-Clause 1.4 defines the “rules of the game” by fixing the legal jurisdiction and the authoritative language of the Project. Without these clear parameters, projects risk deadlock—where disputes arise not from technical issues, but from disagreements over which law applies or which wording is legally binding.
A small clause with major contractual consequences.
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