Insights & answers
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International arbitration institutions differ in rules, seat, speed and enforcement reach, and the choice you write into a contract can decide how a future dispute plays out. PAD International Group advises businesses dealing with Iran, the UAE and the UK on picking the right international arbitration institution, drafting the clause and preparing for a dispute. Dr Ahmadreza Moini is also a professional arbitrator and accepts appointments as arbitrator in commercial and contractual disputes.
Why the choice among international arbitration institutions matters
An arbitration institution administers the case: it receives the request, helps constitute the tribunal, applies its rules and, in most cases, reviews or scrutinises the award. Pick one carelessly and you may face delays, an unsuitable seat or an award that is hard to enforce where the other side’s assets sit.
For contracts touching Iran, the UAE or the UK, the decision usually turns on four things: neutrality between the parties, the legal seat, the practical reach of the award, and whether an Iranian-law dimension needs specialist input. If you want advice from an international arbitration lawyer on the whole picture, start with our main arbitration service page.
Why international arbitration institutions, seats and rules differ
Many clauses blur three things. The institution administers the case, the rules govern procedure, and the seat fixes the supervising courts and the arbitration law. They can be combined in different ways, so each should be chosen deliberately and written clearly.
Enforcement drives the decision
An award is only as valuable as your ability to enforce it. The 1958 New York Convention helps, but states may attach reservations, so we map where your counterparty’s assets are before recommending a forum.
Cost, speed and governance
Institutions differ in how they appoint arbitrators, scrutinise awards and handle small or urgent cases. We explain these differences in plain terms so commercial teams can weigh them against the value and risk of the contract.
Major international arbitration institutions compared
The table below summarises the international arbitration institutions our clients ask about most. Rules are updated from time to time, so always check the institution’s own site for the edition that will apply when your arbitration begins. The details were checked against official or reliable sources in October 2026.
| Institution | Base | Rules edition | Quick note |
|---|---|---|---|
| ICC | Paris (ICC headquarters) | 2026 Rules, in force 1 June 2026 | Applies to cases commenced on or after that date |
| LCIA | London | 2020 Rules | A revision was put to consultation in 2026 |
| DIAC | Dubai | 2022 Rules, from 21 March 2022 | DIFC is the default seat under these rules |
| SIAC | Singapore | 7th Edition, SIAC Rules 2025 | In force from 1 January 2025 |
| HKIAC | Hong Kong | 2024 Rules, from 1 June 2024 | Replaced the 2018 Rules |
| TRAC | Tehran | Rules issued March 2018 | Set up under an Iran and AALCO agreement |
| ACIC | Iran | 2023 Rules, in force May 2023 | Linked to the Iran Chamber of Commerce |
The UNCITRAL Arbitration Rules are used for ad hoc cases, without an administering body.
ICC arbitration
ICC arbitration is administered by the International Chamber of Commerce through its International Court of Arbitration. Its 2026 Rules entered into force on 1 June 2026 and include provisions on remote hearings, an early case management conference and disclosure of third-party funders.
LCIA arbitration
LCIA arbitration is conducted under the London-based court’s 2020 Rules. The LCIA opened a consultation on the next revision in March 2026, partly in response to the Arbitration Act 2025, so confirm the edition at the time of filing.
DIAC arbitration
DIAC arbitration follows the 2022 Rules. Dubai Decree No. 34 of 2021 abolished the DIFC Arbitration Institute, which had run the DIFC-LCIA, and transferred its functions to DIAC. Clauses naming the DIFC-LCIA remain valid, but DIAC now administers them.
SIAC and HKIAC
Both are Asian hubs that international parties often accept as neutral. SIAC’s 7th Edition rules took effect on 1 January 2025, and HKIAC’s updated administered rules on 1 June 2024. Consider them where your counterparty or assets are in East or South-East Asia.
Institutional vs ad hoc arbitration
The institutional vs ad hoc arbitration question is really about support. In an institutional case, a body handles appointments, deadlines and administration. In an ad hoc case, the parties and tribunal run the process themselves, often using the UNCITRAL Arbitration Rules, which can be flexible but leave more to chance if the other side is uncooperative.
For most commercial contracts we favour a named institution, because a stalled appointment can otherwise force you into court. Ad hoc can make sense for specialist or long-standing relationships where both sides trust the process. Our guide to LCIA vs DIAC vs ICC arbitration goes further into the practical differences.
Iran-related arbitration: TRAC, ACIC and foreign seats
Where a contract involves an Iranian party, there are two broad routes: an Iranian centre, or a neutral foreign institution with an Iranian-law dimension. Iran has at least two institutional options. The Tehran Regional Arbitration Centre (TRAC) was established in 1997 under an agreement between the Iranian government and AALCO and began operating in 2005. The Arbitration Center of the Iran Chamber of Commerce (ACIC) published updated rules in 2023.
Iran acceded to the New York Convention on 15 October 2001, with declarations limiting it to commercial matters under its own law and to awards made in other contracting states. The UAE acceded on 21 August 2006 and the UK on 24 September 1975. These details shape which seats are practical for enforcement in Iran.
When an Iranian centre fits
A centre in Tehran can suit a contract with Iranian assets, an Iranian-language record or a counterparty that will only accept a local forum. We help weigh the trade-offs, including enforcement and neutrality perceptions.
When a neutral seat fits better
Foreign parties often prefer London, Dubai or Singapore. The clause can still make Iranian law the governing law, which is where our input matters. See our note on arbitration law in Iran.
Enforcing against Iranian assets
A strong clause is only half the story. We explain how awards are taken to Iranian courts in our article on how to enforce an arbitral award in Iran, and in our Iranian judgments enforcement analysis.
A practical framework for choosing between international arbitration institutions
When we advise on choosing an arbitral institution, we run through a short checklist with the client:
- Where are the counterparty’s assets, and is that state a New York Convention party? The Convention’s website lists 172 contracting states.
- Is a neutral seat needed, or will both sides accept a regional centre?
- What is the likely value of claims, and do you need a fast-track or emergency route?
- Which governing law applies, and does it include Iranian law?
- Does the institution have a rules edition that suits the contract term, given that rules are revised periodically?
The answers usually narrow the field to two or three realistic options. We then document the reasoning so your board or lender can see why the clause was chosen.
Get the seat right
The seat fixes the supervisory courts and the arbitration statute. Choosing an institution in one country and a seat in another is possible, but it should be an informed choice, not a drafting accident.
Avoid pathological clauses
Vague wording, a non-existent institution or inconsistent forum clauses are common. Read our guide to arbitration clause drafting mistakes before you sign.
How PAD supports your choice of international arbitration institutions
PAD advises on the legal and commercial side of arbitration. Dr Ahmadreza Moini is also a professional arbitrator and accepts appointments as arbitrator in commercial and contractual disputes. As advisers, we help you decide, draft, prepare and enforce. This works well alongside our international contract lawyer and commercial contract services.
Clause and seat advice
We recommend an institution, seat, language and governing law that fit your deal, and draft or review the clause, including for Iran-linked contracts through our contract drafting and review in Iran service.
Preparing claims and appointments
We help organise evidence, shape the request for arbitration and think through arbitrator profiles and nominations, working with counsel admitted in the seat where needed.
Iranian-law input
Where Iranian law is in play, we provide analysis and can support proceedings through our Iranian law expert witness service.
Enforcement planning
We assess where and how an award could be enforced, including in Iran, and flag reservations that may affect the route.
Dr Moini and how PAD works
PAD International Group was founded in 2013 and is led by Dr Ahmadreza Moini, a Grade One attorney at law and member of the Iran Bar Association and the Tehran Arbitrators Association. He holds a PhD in private law and lectures at university. Our office is at the Business Center, Sharjah Publishing City Free Zone, UAE, and we hold online consultations in English, Arabic and Persian.
To be transparent: Dr Moini is not a UK-qualified solicitor or barrister, and PAD is not an SRA-authorised firm. Where a matter needs counsel admitted in England, the UAE or another jurisdiction, we work with local lawyers. For the wider service, see our international arbitration lawyer page and our Iranian lawyer service.
Why choose PAD for arbitration advice
Clients come to us when the contract sits between legal systems and they need someone who understands both the Iranian and the international side.
Iran, UAE and UK perspective
We work daily across these three markets, so we can explain how a clause will read to a court in each.
Plain, honest advice
We state clearly what we can and cannot do, and we do not guarantee outcomes.
Bilingual service
Consultations are available in English, Arabic and Persian, which helps when documents and witnesses are in both.
One joined-up team
Contract drafting, dispute preparation and enforcement planning are handled together, avoiding gaps between advisers.
How We Work: Four Steps
- Share the contract and dispute context — Send us the draft or signed agreement, parties, governing law and where assets sit.
- Review and options — We compare realistic institutions and seats and explain the trade-offs in plain language.
- Draft or prepare — We draft the clause, or prepare the claim, arbitrator nominations and Iranian-law material.
- Enforcement plan — We map how an award would be enforced and coordinate with local counsel where required.
Frequently Asked Questions
What are international arbitration institutions?
They are organisations that administer arbitrations under their own rules, such as the ICC, LCIA, DIAC, SIAC and HKIAC. They help constitute tribunals, manage deadlines and often review awards. They do not decide the dispute themselves; independent arbitrators do. Dr Ahmadreza Moini acts as a professional arbitrator in commercial and contractual disputes.
How do I choose an international arbitration institution?
Weigh neutrality, the seat, enforcement reach, the value of claims, speed and the institution’s rules. Check where the counterparty’s assets are and whether that state is a New York Convention party. A lawyer can help you compare options before the clause is signed.
What is the difference between institutional and ad hoc arbitration?
In institutional arbitration a body administers the case under its rules. In ad hoc arbitration the parties and tribunal manage the process, often using the UNCITRAL Arbitration Rules. Ad hoc can be flexible, but it relies on cooperation and may need court help if an appointment stalls.
Is ICC arbitration better than LCIA or DIAC arbitration?
No institution is better in every case. ICC arbitration is widely used internationally, LCIA arbitration is London-based, and DIAC arbitration is a Dubai option. The best fit depends on seat, counterparties, assets and cost. Our comparison article covers LCIA vs DIAC vs ICC.
What happened to the DIFC-LCIA?
Dubai Decree No. 34 of 2021 abolished the DIFC Arbitration Institute, which had operated the DIFC-LCIA, and transferred its functions to DIAC. Clauses naming the DIFC-LCIA were preserved, but DIAC now administers those cases.
Are there international arbitration institutions in Iran?
Yes. The Tehran Regional Arbitration Centre (TRAC) and the Arbitration Center of the Iran Chamber of Commerce (ACIC) both offer institutional arbitration. Whether either suits your contract depends on the parties, assets and enforcement plan.
Can an arbitral award be enforced in Iran?
Iran is a New York Convention party, having acceded in 2001, with declarations on commercial matters and reciprocity. Enforcement still goes through the Iranian courts and depends on the facts. See our guide to enforcing an arbitral award in Iran.
Does Dr Ahmadreza Moini act as an arbitrator?
Yes. Dr Ahmadreza Moini is a licensed professional arbitrator and a member of the Tehran Arbitrators Association, and he accepts appointments as arbitrator in commercial and contractual disputes. Our team also advises on choosing the institution and seat, drafting clauses, preparing claims and enforcement planning. Where counsel admitted in another jurisdiction is needed, we work with local lawyers.
Get advice on international arbitration institutions before you sign
A few hours spent on the right clause can save months later. If you are weighing international arbitration institutions for a contract or already facing a dispute, speak to our team. Email info@padinternationalgroup.com, message us on WhatsApp at +44 7368 955207, or use our contact page. We reply within 24 to 48 business hours. You can also read about our full international arbitration lawyer service.
Sources
- New York Convention – Contracting States
- ICC – 2026 Arbitration Rules
- Charles Russell Speechlys – LCIA consultation on revising rules
- Vinson & Elkins – 2022 DIAC Rules enter into force
- Clifford Chance – SIAC Rules 2025
- Debevoise – HKIAC 2024 Rules
- AALCO – Tehran Regional Arbitration Centre
- Kluwer Arbitration Blog – ACIC 2023 Rules
This page is general information, not legal advice for a specific case.
Where a contract involves an Iranian party or an arbitration seated in Iran, see our page on contractual arbitration in Iran, covering arbitration clauses, proceedings under Iranian law and enforcement of awards.