Who owns a lawyer's conduct: bar rules, licensing and cross-border practice

A New York-qualified lawyer sits in a London office, drafting a memo on a Delaware merger for a French client. Before she types a word of legal advice, three separate professional conduct regimes already govern her: the New York bar that licensed her, the England and Wales regulator that oversees where she physically works, and Delaware's corporate law framework that shapes the substance of her advice. None of these regimes announce themselves. The lawyer, and her firm's compliance function, must know which rulebook applies to which part of the engagement, or risk disciplinary action, malpractice exposure, or an unenforceable opinion letter. This lesson maps that terrain.

Why lawyer regulation is fragmented by design

Unlike banking or securities regulation, which increasingly coordinates across borders through bodies like the Basel Committee, lawyer regulation remains stubbornly national and often sub-national. There is no global bar exam and no single international law society with binding authority.

In the United States, each of the 50 states (plus DC) runs its own licensing regime through a state bar and state supreme court. Passing the California bar does not authorize you to practice in New York. In England and Wales, the Solicitors Regulation Authority (SRA) licenses and disciplines solicitors, while the Bar Standards Board (BSB) regulates barristers, a distinct courtroom-advocacy branch of the profession that has no direct US equivalent.

This fragmentation exists because bar admission is treated as a matter of consumer protection and judicial administration, historically a state or national sovereignty issue, not a matter for harmonized international trade rules.

The core US framework: state bars and the Model Rules

Every US-licensed lawyer answers first to the state bar(s) that admitted them. Most states base their ethics codes on the American Bar Association's Model Rules of Professional Conduct, a template that states adopt with local amendments. The ABA itself has no enforcement power; discipline happens at the state level, usually through a state supreme court's disciplinary board.

Key Model Rules that show up constantly in law firm compliance work:

• Rule 1.6 (Confidentiality): broader than attorney-client privilege; covers nearly all information relating to representation.
• Rule 1.7 (Conflicts of Interest): the backbone of every firm's conflicts-check system before opening a new matter.
• Rule 5.5 (Unauthorized Practice of Law, UPL): restricts practicing law in a jurisdiction where you are not admitted. This is the rule that makes the New York lawyer in London nervous.

Full text is freely available via the ABA Model Rules of Professional Conduct.

The multijurisdictional practice problem

Rule 5.5 generally prohibits practicing law where you lack a license, but it carves out exceptions for temporary practice: work related to a pending matter, arbitration, or advice on the law of the jurisdiction where you are admitted, done on a temporary basis while physically present elsewhere. This is precisely the exception a New York lawyer in London relies on when advising on Delaware law. The moment she starts advising on English law, she is outside the exception and needs SRA-recognized status or must work under supervision of an England-qualified solicitor.

Large firms manage this with formal "bar admission tracking" systems: HR and compliance databases that record every lawyer's active licenses, CLE (Continuing Legal Education) credit status, and jurisdictional restrictions, flagged against every matter they staff.

The England and Wales framework: SRA, BSB and the SQE

Since 2007, England and Wales has regulated legal services under the Legal Services Act 2007, which created the Legal Services Board (LSB) as an oversight regulator and designated frontline regulators including the SRA (solicitors) and BSB (barristers).

A major recent shift: since 2021, new solicitors qualify through the Solicitors Qualifying Examination (SQE), a centralized two-part assessment that replaced the older training contract route. This matters for cross-border firms because it changed how US and international lawyers can qualify as dual-qualified solicitors, often a faster path than before.

The SRA also enforces the SRA Standards and Regulations, including the Code of Conduct, which covers confidentiality, conflicts, and client money handling (the Accounts Rules), broadly analogous to US trust account rules but with distinct reporting mechanics.

Passporting, home-country control, and the EU wrinkle

Within the EU, the Establishment Directive (98/5/EC) historically let a lawyer qualified in one member state register and eventually integrate into the profession of another member state, a form of professional "passporting" similar in spirit to financial services passporting.

Brexit ended UK solicitors' automatic passporting rights into the EU and vice versa. Since January 2021, a UK-qualified solicitor wanting rights of audience or established presence in, say, Paris or Frankfurt, must qualify under that country's national rules for third-country lawyers, unless bilateral arrangements apply. Many UK firms responded by having London partners requalify in Ireland (an EU member state where reciprocal recognition persisted) precisely to preserve EU-facing rights. This is a direct, practical compliance cost created by a regulatory border shift, not a hypothetical.

In-house counsel and the multinational client problem

In-house lawyers face a parallel version of this problem. A US company's general counsel advising the London subsidiary, or a UK in-house lawyer advising the New York parent, must track where their advice constitutes "practicing law" under local UPL-type rules. Many US in-house counsel who move abroad register as Registered Foreign Lawyers (RFL) with the SRA precisely to operate lawfully without full requalification.

Conflicts of interest across regimes

Conflicts rules diverge in ways that matter operationally. US Model Rule 1.7 generally applies conflicts checks firm-wide (all lawyers in a firm are treated as one unit for conflicts purposes, called imputation). The SRA's conflict rules are broadly similar in spirit but interact differently with information barriers ("Chinese walls"), which English courts and regulators have historically treated somewhat more permissively for large multi-office firms than some US jurisdictions have.

Practically: a global firm with offices in New York and London running a cross-border deal must run conflicts checks against both regimes simultaneously, and a clearance under one does not guarantee clearance under the other.

Malpractice, privilege, and choice of law

Professional liability exposure follows yet another layer of rules. Legal malpractice claims in the US are governed by state tort and contract law, varying meaningfully by state on statutes of limitation and standard of care. Attorney-client privilege itself is not uniform: US privilege doctrine (state-by-state, plus federal common law in federal courts) differs from English "legal professional privilege," which itself splits into legal advice privilege and litigation privilege, categories that do not mapmapUtiliser un logiciel pour automatiser les tâches et campagnes marketing répétitives, afin de personnaliser à grande échelle sur des canaux comme l'email, le web et le social.Voir la définition complète → cleanly onto US doctrine. Cross-border firms must caveat opinion letters and privilege logs accordingly, often stating explicitly which jurisdiction's privilege rules a document is prepared to satisfy.

This is why firms increasingly build formal conflicts and licensing technology stacks: matter-intake systems that tag each engagement with the jurisdictions involved, the licensing status of every timekeeper, and applicable privilege regimes, generating an audit trail before the first billable hour is logged.

🎬 [VIDEO: "How Lawyers Are Regulated Around the World" — youtube.com — search for comparative bar association and law society explainer content covering US, UK and civil law licensing models]

A concrete governance checklist firms actually use

1. Admission mapping: which bar(s) is each lawyer on the matter admitted to, and is that license active (not suspended for missed CLE or dues)?
2. UPL screening: does any part of the advice cross into a jurisdiction where a team member lacks standing under a Rule 5.5-type exception or SRA equivalent?
3. Conflicts run twice: once under home-firm policy, once against any jurisdiction-specific rule that diverges (imputation, information barriers).
4. Privilege tagging: mark documents with the intended privilege regime at creation, not retroactively during a dispute.
5. CLE/CPD tracking: US Continuing Legal Education and UK Continuing Professional Development have different hour requirements and reporting cycles per jurisdiction; lapses can suspend a license mid-matter.

Key Takeaways

• Lawyer regulation is jurisdiction-by-jurisdiction (US: 50+ state bars; England and Wales: SRA and BSB under the Legal Services Act 2007), with no global licensing body.
• US Model Rule 5.5 and its narrow temporary-practice exceptions determine whether a lawyer advising abroad on home-jurisdiction law is compliant; crossing into local-law advice without local qualification risks unauthorized practice of law.
• Brexit ended automatic EU-UK legal passporting under the old Establishment Directive framework, forcing firms to requalify lawyers (often via Ireland) to preserve EU practice rights.
• Conflicts of interest, privilege doctrine, and malpractice standards all diverge by jurisdiction, so cross-border matters require parallel compliance checks, not a single unified check.
• Firms manage this operationally through licensing and matter-intake systems that tag every lawyer's active admissions and every document's governing privilege regime at the outset of a matter.