Introduction

In much of the Arab world, Islamic Sharīʿah is enshrined as a formal source of law. Arab civil and commercial codes frequently blend European legal forms with Shariʿah principles, especially in areas of family law, public law and certain commercial rules. For example, the UAE Constitution declares Islam the state religion and “Islamic Sharia is a main source of legislation” (Art. 7), and its Civil Code instructs courts to apply Sharīʿah principles where the law is silent.

In practice this means that modern statutes in many states incorporate Sharīʿah doctrines (for instance, prohibiting ribā or “interest” and requiring contractual certainty) rather than leaving them as purely theological concepts.

The growing international caseload reflects this reality. Multibillion-dollar construction and infrastructure projects (such as Saudi Arabia’s Vision 2030 mega‐projects in NEOM, Qiddiya, and The Line) are contested before tribunals under contracts that blend local law, Sharīʿah norms and standard forms (e.g. FIDIC). Complex energy and natural‐resource projects likewise often involve Arab sovereigns and Sharīʿah-influenced regulation.

In finance, the rise of Islamic banking and sukūk debt has led to arbitrations where compliance with halal (permissible) finance rules is in dispute. Even investment-treaty cases can raise Sharīʿah issues, for example when a host state’s actions (like profit‐sharing mandates or ownership limits) reflect Islamic law values. In all of these contexts, an expert witness on Sharīʿah and Arab law is the key mechanism for a tribunal’s accurate understanding. As one commentator observes, disputes “often hinge on the interpretation and application” of an Arab state’s law (rooted in Sharīʿah), and the “credibility and authority” of a qualified expert can literally determine the outcome.

1. Why Sharia and Arab Law Require Expert Interpretation in International Disputes

1. Sharia as a Legal Source, Not a Religious Abstraction

Sharīʿah is sometimes misunderstood by outsiders as merely a set of religious or moral precepts. In fact, for most Arab jurisdictions it functions as an integrated legal system. Constitutions, basic laws and civil codes treat Islamic law not as optional or symbolic, but as a binding source of state legislation.

The distinction between Sharīʿah and Islamic law is crucial: Sharīʿah refers to the divine rules believed to be revealed in the Qurʾān and Sunnah, whereas fiqh (jurisprudence) consists of human efforts to interpret and apply Sharīʿah. Thus “the Shariʿah is static and unchanging,” while Islamic law (fiqh) “alters as each generation interprets the Shariʿah”.

In practical terms, judges and legislators in Arab states use Sharīʿah-based reasoning to develop statutes and case law. As one scholar notes, Sharīʿah “includes large areas of personal conduct” and gives detailed guidance on contracts, torts, inheritance and other legal matters. It even prescribes remedies (compensation, penalties, voiding contracts) for breaches. Accordingly, referring to Sharīʿah as law is not just a metaphor, its principles have “enormous practical” legal content and are actively incorporated into modern codes.

An expert witness in such cases must therefore explain Sharīʿah as a normative legal system, subject to doctrinal rules and methodologies, rather than as a set of religious rituals.

Constitutional provisions underscore Sharīʿah’s legal status. For example, Saudi Arabia’s Basic Law declares that “the Kingdom shall govern itself according to the Book of God and the Sunnah of the Prophet”. Similarly, Egypt’s constitution (Art. 2) proclaims that “the principles of the Islamic sharia are the main source of legislation”. Such clauses were originally phrased ambiguously, but modern Arab courts generally agree they mandate respect for core Islamic rules.

Sharīʿah principles are thus taken as mandatory public-law norms. For instance, Saudi courts will invalidate any government regulation that conflicts with an established Sharīʿah duty. This mainstreams Sharīʿah into ordinary lawmaking. A well-known commentary explains that Sharīʿah “acts as a kind of common law” underlying national statutes. In sum, tribunals must treat Sharīʿah as concrete law: an expert witness is needed to translate its historical doctrines into the language of modern contract and public-law analysis.

2. Variability Across Arab Jurisdictions

Sharīʿah’s application is far from uniform across all Arab states. Legal systems in the region range from secular civil codes with only incidental Islamic influence, to hybrid systems, to jurisdictions where Sharīʿah dominates virtually every rule. For example, the UAE federal Constitution (1971) makes Sharīʿah “a main source of legislation” (Art. 7), but in practice Emirati law reserves Sharīʿah for family, succession and endowment matters; most commercial disputes go to civil courts or specialized tribunals, and statutes (often inspired by Egyptian and French law) govern business transactions.

In contrast, Saudi Arabia’s legal order is wholly grounded in Sharīʿah. Its courts draw on the Ḥanbali school and consider the Qurʾān and Sunnah as the constitution. Even so, Saudi law includes modern codifications (e.g. a civil code, commercial code and rules on contracts), which are valid only insofar as they do not conflict with Sharīʿah. The result is that judges perform a hybrid analysis: they apply statutory law supplemented by un-codified Sharīʿah principles. Similarly, Kuwait and Bahrain identify Islam as state religion and Sharīʿah as a principal source, yet rely on enacted laws for most civil and commercial matters.

The position in civil courts can also differ from religious or special courts within the same country. Many Arab states maintain separate Sharīʿah courts for personal-status issues. For instance, UAE court structure provides distinct Sharia courts for matters between Muslims. Non-Muslims never appear in those courts. Crucially, UAE law directs that when the civil law is silent, a judge must apply principles of Sharīʿah. Likewise, in some Gulf states construction or commercial disputes go to ordinary (civil or commercial) courts, while family and inheritance are handled by Sharīʿah courts.

The upshot is that the same term (say “inheritance” or “capacity”) can mean very different things depending on the applicable system. An expert witness must thus navigate these differences, for example, identifying where an issue should be analyzed under a civil-code rule versus a traditional Sharīʿah doctrine, and why.

In short, no single model of Sharīʿah-based law exists. Arabic jurisprudence is famously “amorphous” and subject to multiple schools (e.g. Ḥanafī, Mālikī, Shāfi‘ī, Ḥanbalī) that each yield their own fiqh rules. This diversity can be an asset for flexible interpretation, but it means that what applies in one country (or one school of thought) may differ elsewhere. International tribunals unfamiliar with this diversity can easily oversimplify.

For example, it is a misnomer to say “this contract is Sharia law” without specifying which jurisdiction or interpretation is meant. Thus a key role of the expert is to map the dispute’s facts onto the correct legal framework and explain the applicable local fiqh influences.

3. Public Policy and Mandatory Rules

A further reason Sharīʿah demands expert input is that many of its doctrines are treated as peremptory rules or public policy in Arab law. By definition, such rules cannot be contracted around. Common examples include the ban on ribā (interest) and the prohibition of gharar (excessive uncertainty or gambling-like features in a deal). In Saudi Arabia, for instance, the Arbitration Law expressly conditions enforcement of any foreign award on its compliance not only with general public policy, but “with the rules of Sharīʿah”. Saudi courts have emphasized that Sharīʿah’s compulsory norms are “preeminent and sacred,” forming part of the Kingdom’s public policy. Likewise, in the UAE and other Gulf countries, enforcing courts will refuse awards that contradict fundamental Islamic principles.

A recent analysis notes that under the UAE’s Federal Civil Procedure Code and the Arabian Arbitration Act, any breach of a Sharīʿah-mandated rule can trigger a public-policy challenge. As a UAE practitioner observes, the definition of “public policy” in the Emirates explicitly demands compatibility with Sharīʿah’s core principles. In practice this means arbitrators must be vigilant: an award granting conventional compound interest or awarding a remedy considered harām (forbidden) may be unenforceable on public-policy grounds.

Beyond finance, mandatory Sharīʿah rules pervade other areas. Corporate transactions, for example, may involve Islamic inheritance laws that dictate how shares pass at death, or waqf (endowment) rules that constrain asset transfers.

The prohibition against maysir (gambling/speculation) can impact dispute resolution clauses, and Sharīʿah-origin rules on offer-and-acceptance influence contract formation. Crucially, these mandatory norms are often non-negotiable in Arab jurisdictions: as one commentary warns, awards violating a “fundamental principle of Sharīʿah” could be struck down as against public policy.

In sum, every international tribunal dealing with Arab-law contracts must assume there are hidden Sharīʿah “musts” that transcend the parties’ agreement. Without an expert to identify and interpret these, parties risk designing claims or awards that a local court will reject.

2. Key Subject-Matter Areas Where Sharia-Based Expert Testimony Is Decisive

In modern disputes involving Arab laws, certain subject-matter contexts predictably trigger Sharīʿah issues requiring expert analysis. These include:

• Construction and Infrastructure: Large-scale construction contracts in the Middle East often incorporate local procurement laws, state-partner obligations and FIDIC-based clauses modified by Arab doctrine. Experts are frequently needed to explain, for instance, whether statutory public-sector duties or muroor (compulsory approvals) under Sharīʿah-influenced law affect contractor rights. Issues like permissible penalties for delay and the validity of performance bonds can depend on Islamic civil-law concepts of obligation and remedy. In one high-profile Saudi project, for example, counsel had to account for how Sharīʿah shapes liquidated damages and extension-of-time entitlements under local law.
• Energy and Natural Resources: Oil, gas and mining agreements in Arab states often embed elements of public law and Sharīʿah. For example, profit-sharing arrangements or investment subsidies may have an Islamic legal rationale (such as ensuring ’adl (equity) between partners). Sharīʿah boards in state-owned enterprises or special endowment structures (waqf) can also come into play. Disputes in this field may turn on whether regulatory actions (e.g. nationalization of a fuel distribution network) conflict with treaty clauses, given that some measures may be justified on Shariʿah grounds (like “public necessity”). An expert witness can unpack these nuances by showing how Islamic public-law principles would evaluate government measures.
• Banking and Finance: This is perhaps the area most laden with explicit Sharīʿah content. Contemporary Islamic finance contracts (such as murābaḥah cost-plus sales, mudārabah partnership financing, ijāra leases and sukūk bonds) are designed to comply with Sharīʿah’s prohibitions on ribā, gharar and maysir. Tribunals hearing disputes over, say, a Shariʿah-compliant loan or commodity murabaha must understand these structures. Crucial questions include: Was the financing halal? Does a borrower’s failure to pay interest trigger Sharīʿah sanctions? Can a guarantor invoke Sharīʿah defenses to avoid payment? For example, one expert explained that under Shariʿah, money itself has no intrinsic value, so a conventional interest charge would be void. Another common issue is the role of a corporate Sharīʿah board: was a contract properly certified as compliant, and does that consent bind the parties? Without expert testimony, international courts risk misreading these instruments. Indeed, Western forums often lack practical experience with Islamic finance, as even leading London or New York courts have been “Sharīʿah-inexperienced” when first addressing such contracts.
• Investment and Treaty Disputes: Cross-border disputes under BITs or investment contracts can implicate Sharīʿah indirectly. For example, a state investor’s stake might be held in a company where share-transfer rules are governed by Sharīʿah inheritance laws. Or a regulatory change (like introduction of a Muslim-friendly banking code) could be motivated by Sharīʿah policy. In treaty arbitrations against Arab states, questions of public policy, good faith and “fair and equitable treatment” sometimes intersect with Islamic concepts of governance and property rights. An expert can advise on whether a challenged state action is consistent with mandatory Islamic law standards, and thus whether it falls outside the tribunal’s competence under public‐policy exclusions. In short, even when arbitration is framed in ostensibly secular terms, an underlying Shariʿah backdrop often shades the issues.

Each of these fields demonstrates why knowledge of Islamic jurisprudence is decisive. Global parties often underestimate how deeply Sharīʿah considerations can influence outcomes, from contract validity to award enforcement. An expert ensures those factors are neither ignored nor misunderstood.

3. The Strategic Role of the Expert Witness in Sharia and Arab Law Disputes

In Sharīʿah-related disputes, expert witnesses perform multiple strategic functions. They first correct misconceptions. International counsel and arbitrators may mistakenly conflate Sharīʿah with religion or treat it as a static code of medieval rules. A skilled expert will explain Sharīʿah as a modern legal system—“a kind of common law” woven into statutory regimes—and will clarify that its origins lie in religious texts interpreted by jurists, not in the whims of clerics.

For instance, experts can dispel the notion that any contract with an “Islamic” label must automatically be null; instead they show how Sharīʿah-derived doctrines (e.g. on capacity, consent, consideration) actually operate as predictable legal tests. They also guard against cultural stereotyping. As one practitioner warns, even neutral courts in London or Singapore have been “Sharīʿah-inexperienced” when first confronting Islamic-finance cases. The expert thus puts Sharīʿah issues in familiar legal terms for the tribunal, correcting any overgeneralizations.

Next, experts translate legal concepts across systems. Arbitration often involves mixing civil-law, common-law and Sharīʿah elements. An expert shows how doctrines align (or clash) among these. For example, the concept of bayʿ al-murābaḥah (cost-plus financing) has no direct analogue in common law, but is treated like a sale with markup in Sharīʿah finance. Similarly, principles like ḥiwālah (debt assignment) or tawarruq (arranged sale) may need explanation.

Experts draw parallels: e.g. noting that Sharīʿah’s emphasis on contractual consent echoes “meeting of the minds” in civil law, but Sharīʿah adds its own twist to prohibition of deceit. They point out where local law diverges: under English arbitration law, a parties’ agreement that “English law applies except where it conflicts with Sharīʿah” is permitted, whereas a civil-law tribunal might balk at any religious clause without guidance.

In fact, expert evidence effectively becomes the glue linking systems: it tells a common-law tribunal that a Middle Eastern court would see matters differently (for example, that the ban on interest is considered a mandatory local rule, or that certain obligations fall under mandatory state law). This cross-system interpretation is vital for the tribunal to weigh contractual obligations, remedies and defenses correctly under the applicable Arab law.

Experts also assist in early case assessment and risk management. In the initial review of a claim, an Arab-law specialist will flag any Sharīʿah-based vulnerabilities. For instance, if a contract’s payment terms could be considered rāhibah (unjust enrichment) under Sharīʿah, the expert will advise avoiding typical interest-based damages or structuring payment differently.

They may spot that a governing-law clause in the contract inadvertently invokes Sharīʿah: as one commentator notes, even referencing “Islamic Shariʿah” requires precision to have legal effect. By identifying these issues early, the expert helps the claimant frame demands and remedies in a Sharīʿah-compliant way. They might suggest adding choice-of-law language to preserve enforceability in Arab courts (for example, specifying UAE law “as supplemented by Islamic Sharīʿah” as discussed below) or adjusting expert scopes. Essentially, the expert integrates Sharīʿah analysis into the litigation strategy, so the case avoids procedural traps.

Finally, the expert safeguards enforceability of awards. The looming danger is that even a well-founded award can be set aside in an Arab jurisdiction for violating public policy if it ignores Sharīʿah. An expert prepares the tribunal to draft awards with this in mind. For example, they might recommend the tribunal refrain from awarding conventional compound interest, noting that “usury” is forbidden in local law, and instead allow only a modest contractual penalty.

The expert may advise on how to phrase the award (e.g. calling a payment a “service fee” rather than “interest”), or on including explicit findings of Sharīʿah compliance. In one Middle East arbitration, a tribunal under DIFC (Dubai International Finance Centre) law explicitly invoked the DIFC Arbitration Law’s allowance for “rules of law chosen by the parties” to give effect to Sharīʿah as part of the governing law. Such careful linkage, informed by expert input, makes enforcement more likely: Dubai courts now routinely enforce DIFC awards and will look favorably on awards crafted to respect Sharīʿah norms.

By contrast, a negligent tribunal might issue a broad damages award only to have it refused by an Abu Dhabi court on Sharīʿah grounds. Thus experts perform a final crucial function, making sure that the tribunal’s reasoning and outcome will be recognized by local enforcement authorities.

4. What Makes an Effective Sharia and Arab Law Expert Witness

An effective Sharīʿah/Arab-law expert brings depth of regional knowledge, legal credibility and practical scholarship. Such an expert is typically a qualified lawyer or academic in the relevant Arab jurisdiction (often a native Arabic speaker) with extensive publication or courtroom experience.

They should be recognized by local courts or tribunals, for example, many Gulf courts require experts to be officially approved or licensed. (Saudi Arabia’s recent Law of Evidence even stipulates that experts be appointed or approved by the judge.) In practice, an expert who has testified under multiple Arab laws and in various forums will carry weight: as one market commentator notes, an expert “whose opinions have been accepted by courts in the UK, Dubai and Kuwait” adds “immense persuasive value” in an international case.

Independence and clarity are equally essential. The expert must present objective analysis, based on statutes, judicial decisions and well-established doctrine, not advocacy. They should clearly cite authorities (in Arabic if necessary) and explain their relevance. Neutrality is paramount: a tribunal will trust a witness who acknowledges conflicting interpretations and uncertainties in Sharīʿah, rather than one who overstates or cherry-picks. At the same time, the expert must remain practical. They should tailor their testimony to the tribunal’s needs, using familiar legal concepts where possible (e.g. explaining taʿdīl (contract adjustment) as akin to doctrine of good faith) and avoiding jargon.

Effective experts also work collaboratively with counsel. Before the hearing, a good expert will review the case documents to identify all Sharīʿah angles, not just the obvious ones. They may suggest additional research or witnesses (e.g. a local legal scholar or a Shariʿah board member) if needed. During testimony, they should be prepared to field detailed questions and cite specific legal sources. Their opinion reports (and oral testimony) should interweave comparative insight, for example, noting differences between Shariʿah and Western law on a point, while always returning to the governing law analysis.

In summary, an expert’s value lies in authority and precision. The best witnesses are those who combine mastery of Arab legal materials with the ability to translate them into the legal framework of the arbitration. As one Gulf arbitration specialist puts it, Sharīʿah experts “must wear three hats”: jurist, educator and advocate for the correct law. When chosen wisely, they function as the bridge between systems and earn the tribunal’s confidence.

5. Illustrative Case Example

Consider a DIAC arbitration under UAE law arising from a disputed loan agreement. The contract specified “the Law of the United Arab Emirates (applicable Sharīʿah rules prevailing)”. On its face, foreign counsel expected conventional interest and late-payment penalties. However, when the Emirati defendant challenged the claim, the claimant appointed a Sharīʿah expert. In hearings, the expert explained that under UAE civil code and Islamic principles, charging explicit interest is forbidden.

The tribunal accepted this analysis. Rather than award compound interest on the arrears, it awarded only a fixed service charge permissible under Sharīʿah, as the expert advised.

Moreover, the expert guided the drafting of the award. They recommended explicitly framing any financial remedy as a predetermined fee rather than “interest,” noting that UAE courts often read awards for Sharīʿah compliance. The tribunal followed up by citing Article 35 of the DIFC Arbitration Law, which allows parties to include Sharīʿah in their chosen rules.

As a result, the award called the governing law “UAE law, except that where it conflicts with Islamic Sharīʿah, the Sharīʿah shall prevail”. When the respondent attempted to resist enforcement in Dubai, the court enforced the ICC award, observing that the tribunal had carefully accommodated Sharīʿah as agreed.

By contrast, imagine if no expert had been used. The tribunal might have imposed an outcome (like compounded interest) immediately deemed void in enforcement. Instead, expert testimony ensured the award both reflected the parties’ bargain and could survive Sharīʿah-based scrutiny. This hypothetical mirrors real patterns: English courts have enforced awards by Sharīʿah arbitrators when contracts provided that the Sharīʿah “shall prevail” over English law. It also illustrates how early identification of Sharīʿah issues (pre-casting interest as a permissible fee) and careful drafting (explicit Sharīʿah incorporation) make an award resistant to challenge.

In short, whether in this finance scenario or in a construction joint-venture or energy project, the expert helped convert Sharīʿah pitfalls into manageable legal questions. Her testimony educated the tribunal on Islamic legal concepts (treating ribā as void and describing gharar prohibitions), prevented a misapplication of the law, and ultimately secured an enforceable outcome.

Conclusion

Shariʿah and Arab legal rules now lie at the heart of many high-stakes international disputes. These are not arcane curiosities but binding laws: Arab constitutions and codes treat Islamic law as a primary source, and courts will enforce only those awards compatible with its fundamentals. For global arbitrators and counsel, overlooking this reality is perilous.

Expert testimony on Sharīʿah and Arab law is not an optional extra but an essential safeguard. A qualified expert translates foreign legal concepts into the local lexicon, highlights mandatory doctrines, and keeps the tribunal on the correct path. They ensure that the parties’ contract and the tribunal’s award are aligned with the norms of the Arab jurisdiction, in form and substance.

As one Youssef + Partners analysis puts it, in Sharīʿah-governed disputes “the credibility and authority” of the expert “can determine the outcome”. By serving as the bridge between common law, civil law and Islamic law, the expert fills the gap in the tribunal’s understanding. In doing so, they protect the parties’ interests and the enforceability of the award. In sum, where Sharīʿah is at issue, expert evidence is indispensable, it embodies the tribunal-facing authority, precision and regional depth that global clients and courts rightly demand.