The 2024 CPR Guidelines for Arbitrator Disclosure: What They Change, What They Don’t, and How to Use Them

Bottom line: the 2024 CPR Guidelines for Arbitrator Disclosure don’t try to rewrite conflict-of-interest law. Instead, they operationalise it. Where the IBA Guidelines tell you what relationships may matter (red/orange/green lists), the CPR Guidelines show arbitrators how to run a robust, repeatable disclosure process from first contact to final award. If you sit as arbitrator, nominate arbitrators, or want to challenge one, the CPR text is a practical playbook—and a welcome one.

At TRW, we help businesses and co-counsel design conflict checks, structure disclosure statements, and anticipate challenges in seats from London to Dubai and beyond. If you need a partner to embed these workflows into your matter management, start here:

• International Arbitration & Dispute Resolution
• Corporate & Commercial Contracts

Why disclosure matters more than ever

Arbitration depends on two pillars: party autonomy and trust. Arbitrators are chosen—often repeatedly—because of expertise and efficiency. That creates risk: repeat appointments, institutional roles, funders, experts, co-counsel networks, law-firm conflicts, even algorithmic tools used in case preparation can spawn perceived or actual conflicts.

The legal tests are familiar—impartiality, independence, and appearance of bias under the lex arbitri and applicable institutional rules. But the practical risk lives in the process: missed hits in a law-firm database, a LinkedIn advisory role, a matter coded under the wrong client name, a co-arbitrator’s clerk who formerly worked with counsel, or a third-party funder whose portfolio includes the opponent’s parent. The CPR Guidelines are designed to reduce those process failures.

CPR vs. IBA: complementary tools, different angles

• IBA Guidelines (2014/2024 updates): a taxonomy of situations with colour-coded lists (Red/Orange/Green). They answer, “Is this relationship serious enough to require disclosure or disqualification?”
• CPR Guidelines (2024): a method. They answer, “How do I run conflict checks properly, document them, disclose succinctly, and keep disclosing throughout the case?”

Think of the IBA as substantive risk categories and CPR as procedural muscle memory. The best practice is to apply both.

The six CPR Guidelines—expanded with practical playbooks

1) Confirm the disclosure regime

What CPR says: Identify and follow the applicable laws, rules, standards.
Make it real: Before accepting appointment, assemble a one-page matrix:

Topic	Source	What it requires	Who owns compliance
Lex arbitri (seat)	Arbitration statute	Threshold for impartiality/independence; continuing duty	Arbitrator
Institutional rules	e.g., CPR/ICC/LCIA/SIAC	Disclosure scope; timing; challenge procedure	Arbitrator + Case manager
IBA Guidelines	Soft law	Red/Orange/Green mapping	Arbitrator
Confidentiality	Parties’ agreement/PO1	What may be disclosed and to whom	Tribunal

Tip for parties: build these references into PO1 so everyone shares the same map from day one.
See also: International Arbitration & Dispute Resolution

2) Maintain a proper conflicts database

What CPR says: Keep a searchable record of prior/pending cases to speed and improve checks.
What to capture (minimum viable fields):

• Case metadata: institution, rules, seat, dates, status.
• Parties & corporate trees: ultimate parents, affiliates, DBAs, historical names.
• Counsel & experts: firms, teams, key individuals; tribunal secretaries.
• Funders/insurers: identities, portfolio notes (if disclosed).
• Subject matter tags: sector, project, assets, core issues.
• Appointment source: party, institution, co-arbitrator.
• Outcome & challenges: any disclosure issues, withdrawals, court decisions.

Data hygiene: normalise names (e.g., “ABC B.V.”, “ABC BV”, “ABC Netherlands”), and maintain a synonym table for robust searches.

3) If at a law firm, widen the search perimeter

What CPR says: Include interests and relationships across the firm.
Practical scope:

• Client conflicts: current, recent, prospective; engagement letters; Chinese walls.
• Matter conflicts: adverse to affiliates? secondments to client?
• Personal & economic ties: equity, bonus pools, success fees tied to a litigated client?
• Lateral hires: capture their former clients; run retroactive checks.
• Business development: pitches and NDAs often reveal sensitive ties—index them.

Governance: appoint a conflicts partner or general counsel to sign off before acceptance. Document the screening if you will act as arbitrator while colleagues act as counsel in unrelated matters for an affiliate of a party.

4) Look beyond the database

What CPR says: Consider non-database interests: personal, family, social, academic, and board roles.
Add these lenses:

• Family & household: employment, advisory roles, equity holdings.
• Boards & charities: even unpaid roles can matter if stakeholders overlap.
• Professional ecosystems: chambers, committees, editorial boards, think-tanks.
• Social media & public commentary: posts about parties, issues, or related litigation.
• AI & tech tools: if you rely on a vendor with relationships to parties (e.g., sponsoring your conference or licensing data from them), decide whether to disclose the connection and the guardrails you use (e.g., offline models, no-client-data training).
• Repeat appointments: frequency with the same party/counsel and whether you acted as chair or wing.

Heuristic: If a reasonable, informed observer might think the information could bear on independence or impartiality, disclose it concisely.

5) Draft a clear, bounded disclosure statement

What CPR says: Provide a brief summary of potential conflicts and general background/limitations.
A clean structure (5 paragraphs, 300–500 words):

1. Scope & sources searched: “I searched my personal and firm databases (2013–present), billing systems, calendars, and public sources for [Party/Parent/Affiliates; Counsel; Experts; Funders].”
2. Relationships found (if any): “From 2020–2022, my firm advised [Parent Co.] in an unrelated financing. I had no involvement. The matter concluded in 2022. No current mandates exist.”
3. Repeat appointments: “In the last five years, I served in two unrelated arbitrations where [Firm X] was counsel (once as party-appointee, once as chair).”
4. Other roles: “I am on the editorial board of [Journal], which includes [Expert Y]. No remuneration; no case-specific contact.”
5. Limitations & ongoing duty: “Corporate groups evolve; despite best efforts, databases may be incomplete. I undertake to disclose promptly any new circumstances.”

Tone: neutral, factual, non-argumentative. Avoid legal conclusions (“this is immaterial”)—let the parties and institution decide.

6) Treat disclosure as continuous, not one-off

What CPR says: Duty continues throughout the case.
Workflow:

• Trigger points: appointment; constitution; after each major filing (party/affiliate names expand); new counsel; joinder; funder disclosure; hearing; post-hearing briefs.
• Re-run searches on each trigger.
• Minute it: a one-line diary entry “Re-check performed—no new hits” protects the record.
• If new info appears: disclose promptly, propose practical mitigation (e.g., walling off a colleague, declining a conference appearance), and invite views.

Grey areas the CPR Guidelines nudge you to consider (and how to handle them)

Third-party funding & insurers

• What to disclose: the identity of any known funder/insurer and (where permitted) any control or return provisions that might bear on independence; their portfolio overlaps with a party.
• How to manage: adopt an agreed funder disclosure line in PO1 (identity only; not economic terms) and a process for later updates.

Tribunal secretaries

• Risk: undisclosed ties between a secretary and a party/counsel.
• Controls: vet secretaries with the same conflict rigor; disclose their background; define tasks in writing; ensure no delegation of core decision-making.

Experts and expert teams

• Require expert disclosures mirroring arbitrator standards. If a tribunal-appointed expert is contemplated, agree a disclosure form and give parties a chance to object.

Repeat appointments & “issue conflict”

• Track frequency with the same party/counsel; disclose transparently. If you have published views on a technical issue central to the case, disclose them with context and confirm your openness to persuasion by case-specific evidence.

Social and professional networks

• Conferences, panels, and advisory roles are common. Disclose material overlaps and adopt a simple rule: avoid one-to-one case discussions with counsel/parties outside formal channels.

AI and digital tooling

• If you use AI assistants or analytics: disclose that no party documents are used to train external models; confirm offline or enterprise tooling with access controls; and that submissions/awards are drafted and reviewed by humans.

For parties and counsel: using the CPR framework to your advantage

1. At clause stage: bake in a disclosure standard and ongoing duty; incorporate soft-law references (IBA + CPR) and a mechanism for funder disclosure.
2. At appointment: send organised corporate charts and definitive lists of affiliates, DBAs, and relevant former names to reduce false negatives.
3. In PO1: define the scope, timing, and format for disclosures (arbitrators, secretaries, experts, funders); include a protocol for new circumstances and a short window for party comments.
4. Monitoring: when your corporate structure changes or a new funder joins, notify the tribunal immediately.
5. Challenges: anchor any challenge to the seat’s law and institutional rules; show timeliness, materiality, and why curative measures (e.g., screen, disclosure) are insufficient.

Model documents you can adapt today

A) One-page Conflicts Run Book (for arbitrators)

1. Appointment intake: capture case metadata; request affiliate lists; ask for funder/insurer identities.
2. Search: personal DB; firm DB; billing; calendars; email; public sources; social/pro networks.
3. Assess & classify: map findings to IBA lists; evaluate appearance risks.
4. Draft disclosure: use the five-paragraph model; send to institution and parties.
5. Diary triggers: constitution; counsel changes; joinder; new funder; hearing; post-hearing; pre-award.
6. Record-keeping: save searches, results, and disclosures in a secure folder.

B) Disclosure Protocol clause for PO1 (excerpt)

• “The tribunal, tribunal secretary (if any), and any tribunal-appointed expert shall provide initial disclosures within 7 days of appointment, covering relationships with parties, affiliates, counsel, experts, funders/insurers, and any other circumstances that may give rise to justifiable doubts.
• Disclosures are continuing; re-checks shall occur upon (i) party or counsel change; (ii) joinder/consolidation; (iii) funder/insurer disclosure; and (iv) pre-hearing.
• Parties shall notify the tribunal within 5 business days of any material change to corporate structure or funding with identity details sufficient for conflicts checks.
• Any objection shall be raised within 10 business days of disclosure; untimely objections are waived absent good cause.”

How the CPR Guidelines play in London and Dubai (and why that matters for you)

• London (England & Wales): Courts recognise an implied duty of disclosure and take a pragmatic view of apparent bias. CPR-style process discipline complements institutional frameworks (e.g., LCIA) and helps arbitrators demonstrate proactive checking—valuable if a challenge reaches court.
• Dubai (DIFC/ADGM seats and onshore): Disclosure expectations are converging with international practice. Clear, CPR-style procedures protect the record in common-law financial free zones and ensure transparency on funders and repeat appointments—issues that often draw scrutiny in MENA-disputes.

TRW coordinates disclosure strategies across seats and institutions, harmonising soft-law (IBA/CPR) with local practice so you can withstand challenges while keeping momentum.

• International Arbitration & Dispute Resolution

Do’s and Don’ts (quick reference)

Do

• Build and maintain a searchable conflicts database; normalise names.
• Disclose early and clearly; keep it concise and factual.
• Treat disclosure as continuous; diary re-checks.
• Include tribunal secretaries and tribunal-appointed experts in the same regime.
• Disclose funders/insurers (identity) and update when portfolios change.
• Acknowledge limitations honestly (e.g., historic data gaps) and commit to ongoing diligence.

Don’t

• Assert that a relationship is “immaterial”—state facts and let others decide.
• Forget co-arbitrator and counsel team lateral moves mid-case.
• Over-lawyer the statement; avoid argumentative tone.
• Delay disclosing a new circumstance while you “look into it”—send a prompt notice that you are investigating, then follow up.

Will the CPR Guidelines change outcomes?

They’ll change habits—and that often changes outcomes indirectly. Better habits produce:

• Fewer late surprises → fewer procedural skirmishes.
• Cleaner records → stronger defence against challenges.
• Crisper PO1 frameworks → higher case velocity and lower cost.

The law on conflicts remains seat-specific, and institutions retain their challenge and replacement powers. But if tribunals and parties adopt CPR-style discipline, there should be fewer avoidable disputes about the tribunal itself—and more focus on the merits.

How TRW can help

• Arbitrators: We implement conflicts databases, calibrate disclosure templates, and set PO1 protocols that align with IBA + CPR + institutional rules—built to travel across London, Copenhagen, Dubai, and Asia-Pacific seats.
• Parties & counsel: We front-load affiliate mapping, funding disclosures, and challenge strategy; we also run mock disclosure audits to test the resilience of your preferred chair or party-nominee.

Start a conversation:

• International Arbitration & Dispute Resolution
• Corporate & Commercial Contracts

Key takeaways

1. CPR ≠ IBA: CPR is the how; IBA is the what. Use both.
2. Database first: Without a clean conflicts database, everything else is luck.
3. Continuous duty: Re-check at predictable trigger points.
4. Transparent brevity: Disclose facts, not advocacy.
5. Extend the net: Include secretaries, experts, funders, and tech tools in your disclosure horizon.
6. Codify in PO1: Good process beats good intentions.

Well-run disclosures protect legitimacy, efficiency, and enforceability—the three things every sophisticated user of arbitration actually wants.