Business Law for Accountants:
Canada and the United States

1How to read this

What this document is for, and the one mental habit that will save you the most trouble.

Accounting and law describe the same transactions in two different languages, and the accounting language is downstream. A lease is an asset and a liability because a contract gave the lessee a right of use that a court would enforce. Revenue is recognized when control transfers because a body of sales law defines when control transfers. An audit opinion carries risk because tort law lets someone who read it sue you. Every measurement question you will be asked eventually resolves into a legal question about who owes what to whom, and the accountant who cannot see that layer is guessing.

The one habit worth building now: never assume a Canadian rule and an American rule match because the words match. "Audit committee," "fiduciary duty," "bankruptcy," and "wrongful dismissal" all exist in both countries and mean materially different things. The dangerous cases are not the obvious differences. They are the near-identical terms with different content, because those are the ones you will read past without noticing.

A structural asymmetry runs through everything below. Canada centralizes at the top and decentralizes at the bottom: one Supreme Court sits over the whole country and one body of federal law governs banking, insolvency, and criminal matters, while contract, tort, corporate, and securities law sit with the provinces. The United States inverts this: it federalizes securities, insolvency, and antitrust, but leaves contract, tort, corporate, and professional regulation to fifty separate states with no single court to reconcile them. So when you ask "what is the American rule," the honest first answer is usually "in which state," and when you ask "what is the Canadian rule," it is usually "in which province, and does it matter."

2Foundations: where law comes from and who makes it

Sources of law, the two legal traditions, the constitutional division of powers, and the court structures. This is the skeleton every later section hangs on.

2.1 The four sources, in order of authority

Both countries build law from the same four layers, and the order matters because a lower layer that contradicts a higher one is void. The constitution sits on top and is hard to change. Statutes passed by a legislature come next; they can override judge-made law but not the constitution. Regulations and subordinate instruments made under a statute by a regulator or cabinet come third, and are valid only within the authority the statute delegated. Judge-made law, the common law and equity, fills every remaining space and interprets the layers above it.

Two consequences follow that accountants get wrong. First, a regulator's guidance is not automatically law. A CRA interpretation bulletin, an OSC staff notice, or an IRS revenue ruling states the administrator's position, and a court can and does disagree with it. Second, the common law is not a fallback for gaps in legislation. It is a live body of binding rules in its own right, and a great deal of the law that governs your professional exposure, notably negligence, exists nowhere in any statute.

2.2 Common law, civil law, and the fact that both countries are mixed

The common law tradition, inherited from England, builds rules case by case from decided disputes, and treats prior decisions as binding on later courts through stare decisis. The civil law tradition, descended from Roman law through the French and German codes, starts from a comprehensive written code and reasons deductively from its articles; prior decisions are persuasive rather than binding. Nine Canadian provinces and three territories are common law jurisdictions. Forty-nine American states are common law jurisdictions.

Each country has one exception, and they are not symmetric. Quebec applies the Civil Code of Québec to private law: contracts, property, obligations, civil liability, family, and succession. Public law in Quebec, including criminal law, constitutional law, and administrative law, remains common law. Canada is therefore genuinely bijural, and federal statutes that touch private law concepts have to be drafted to work in both traditions. The Department of Justice runs a harmonization programme for exactly this reason. Louisiana retains a civil-law-derived code for private law, but its procedure, commercial law, and constitutional structure are substantially common law, and the federal overlay is common law throughout.

2.3 Who has power over what

This is the single most important structural difference between the two systems, and it is an inversion.

Canada The Constitution Act, 1867 enumerates federal powers in section 91 and provincial powers in section 92. Anything not assigned to either falls to the federal Parliament through the residual "peace, order and good government" power. Federal heads relevant to business include trade and commerce, banking, bankruptcy and insolvency, currency, interest, and criminal law. Provincial heads include property and civil rights in the province under section 92(13), which is the broadest and most consequential head in Canadian business law, along with the administration of justice and the incorporation of provincial companies. Both levels can tax, with the provinces limited to direct taxation within the province.

United States The federal Constitution enumerates federal powers in Article I, section 8, and the Tenth Amendment reserves everything else to the states. The residual power runs to the states, not the centre. The workhorse federal head is the Commerce Clause, which has been read broadly enough to support the entire federal securities, labour, and environmental apparatus. The Supremacy Clause makes valid federal law override conflicting state law.

2.4 Courts

Canada One integrated hierarchy. Each province has a superior court of inherent jurisdiction that hears any matter, federal or provincial, unless a statute removes it, and an appellate court above it. The Supreme Court of Canada sits at the top of everything: criminal, civil, constitutional, common law, and Quebec civil law alike. Alongside this runs a small set of specialized federal courts, notably the Federal Court and Federal Court of Appeal for judicial review of federal decision-makers and intellectual property, and the Tax Court of Canada, which is where an income tax dispute with the CRA actually goes. There is one final word on the law of Canada.

United States Two parallel systems that touch only at the top and only on federal questions. Federal district courts are courts of limited jurisdiction and can only hear a case if there is a federal question or if the parties are citizens of different states and the amount in controversy exceeds a statutory threshold ("diversity jurisdiction"). Above them sit thirteen circuit courts of appeal, which frequently disagree with each other, producing a "circuit split" that persists until the Supreme Court resolves it or does not. State courts run in parallel and their supreme courts are final on questions of state law; the US Supreme Court cannot correct a state supreme court's reading of its own state's contract law. Under the Erie doctrine, a federal court hearing a diversity case applies state substantive law, so a federal judge in Texas decides a Texas contract dispute by predicting what the Texas Supreme Court would do.

2.5 Precedent and how to read a citation

Both systems bind lower courts to higher courts within the same hierarchy, and treat decisions from outside that hierarchy as persuasive only. In Canada, a Supreme Court decision binds every court in the country; an Ontario Court of Appeal decision binds Ontario courts and persuades everyone else. In the United States, a Second Circuit decision binds federal district courts within the Second Circuit and nobody else, and Delaware Chancery decisions carry enormous persuasive weight on corporate matters nationwide despite binding only Delaware.

Learn to read the court out of the citation before you read the holding. A case that says something useful is worth nothing to you if it comes from a court that does not bind your client's jurisdiction, and this is the most common error people make when they search American law from Canada.

3Contract

The body of law that creates almost every asset and liability you will ever measure. Broadly convergent between the two countries, with a handful of divergences that matter.

3.1 Formation, in both countries

A contract requires an offer, an acceptance that matches it, consideration (something of value moving each way), an intention to create legal relations, capacity, and a lawful object. Both countries inherited this from English law and the elements are recognizably the same. Consideration is the one that generates most of the divergence, because it is the requirement that a bare promise, however sincere, is unenforceable unless the promisee gave something for it.

3.2 Where the two diverge

3.3 Interpretation and limitation clauses

Canadian courts read commercial contracts as a whole in light of the surrounding circumstances, and the Supreme Court held in Sattva Capital Corp v Creston Moly Corp, 2014 SCC 53, that contractual interpretation is largely a question of mixed fact and law, which narrows appellate review. American courts vary by state on how much extrinsic evidence they will admit, with New York taking a notably strict four-corners approach and California a more permissive one.

Limitation of liability and exclusion clauses matter to you directly, because they are the mechanism by which an accounting firm caps its exposure on a non-audit engagement. Canada applies the framework from Tercon Contractors Ltd v British Columbia, 2010 SCC 4: the clause is enforced if it applies on its terms, was not unconscionable at formation, and no overriding public policy defeats it. US enforceability varies by state, and several states restrict or void limitation clauses in professional engagements, particularly audits. [VERIFY] the state position before assuming a cap holds.

4Tort and professional liability

The section that decides whether you get sued. Read this one twice.

4.1 The structure of a negligence claim

A plaintiff suing in negligence must establish five things in both countries: that the defendant owed a duty of care, that the defendant's conduct fell below the applicable standard of care, that the breach caused the loss, that the loss was not too remote, and that damage occurred. For a professional, the standard of care is that of a reasonably competent member of the profession, which in practice means compliance with the applicable professional standards (Canadian Auditing Standards in Canada, PCAOB standards for US issuer audits) is strong evidence of meeting the standard but is not automatically conclusive.

Duty of care is where the systems part company. Canada uses a single structured test. The United States does not have one.

4.2 Negligent misrepresentation and pure economic loss

Financial statements cause economic loss, not physical injury, and courts in both countries have always been more restrictive about recovery for pure economic loss than for personal injury or property damage. The reason is the indeterminacy problem: a defective bridge injures the people who cross it, while a defective audit opinion can be read by every investor on earth.

Canada recognizes negligent misrepresentation following Hedley Byrne, with the elements set out in Queen v Cognos Inc, [1993] 1 SCR 87: a duty of care based on a special relationship, an untrue or misleading representation, negligence in making it, reasonable reliance by the plaintiff, and resulting damage. The United States runs the equivalent claim through Restatement (Second) of Torts § 552 in most states, which is where the auditor cases live.

4.3 Auditor liability to third parties: the four cases that define the field

4.4 Statutory liability sits on top of the tort claim

Do not stop at negligence. Securities legislation in both countries creates statutory causes of action against auditors that operate on different, and often easier, terms than a common law claim. Those are set out in section 6, because they are part of the securities architecture rather than of tort law. The point to carry forward is that a plaintiff suing an auditor will generally plead both, and the statutory claim is usually the stronger one.

4.5 What actually protects you

• The engagement letter. After Livent, it is the primary document defining the scope of the undertaking, which is the primary determinant of duty. Vague scope language is a liability position, not a client-service accommodation.
• Third-party reliance letters. Where a lender or purchaser wants to rely on your work, the response is a negotiated reliance letter with defined terms, not silence. Silence in the United States can put you inside Restatement § 552 as a known intended user without any of the protections you would have negotiated.
• Limitation of liability clauses. Available on non-assurance engagements, enforceable in Canada under Tercon, restricted in some US states. Independence rules constrain their use on audits.
• Documentation. The standard of care is judged against professional standards, and unrecorded work is, in evidentiary terms, work that did not happen.
• The firm structure. LLP status shields partners from liability for the negligence of other partners, but never for their own. See section 5.

5Business organizations

Who owns the entity, who runs it, who is on the hook, and who the directors actually owe their duties to. The last question splits the two countries.

5.1 The forms

Both countries offer the same basic menu, and the tax and liability consequences drive the choice. A sole proprietorship has no separate legal existence and the owner bears unlimited personal liability. A general partnership arises automatically when two or more persons carry on business in common with a view to profit, whether or not anyone intended to form one, and each partner is liable for the firm's obligations without limit and can bind the firm as its agent. A limited partnership gives passive partners liability capped at their contribution, provided they stay out of management. A corporation is a separate legal person; shareholders risk their investment and no more.

The professional form matters to you personally. Accounting and law firms in both countries typically operate as limited liability partnerships, which shield each partner from personal liability for the negligence of other partners while leaving them fully exposed for their own acts and for firm obligations generally. In Ontario the LLP is available to professions whose governing statute permits it. The one structural difference worth knowing: the United States has the limited liability company (LLC), a flexible pass-through entity with no true Canadian equivalent. Canada has no LLC statute, and a US LLC is generally treated as a corporation for Canadian tax purposes, which creates recurring cross-border headaches around double taxation and treaty benefits. [VERIFY] the current CRA administrative position and treaty analysis before advising on any specific structure.

5.2 Where you incorporate

5.3 Directors' duties: the real divergence

Both countries impose two duties on directors: a fiduciary duty of loyalty and good faith, and a duty of care to exercise the care, diligence and skill of a reasonably prudent person. The divergence is in the answer to a single question: to whom is the fiduciary duty owed?

Canada CBCA section 122(1)(a) requires directors to act honestly and in good faith with a view to the best interests of the corporation. The Supreme Court held in BCE Inc v 1976 Debentureholders, 2008 SCC 69, that this means the corporation itself, and not the shareholders. Directors may consider the interests of other stakeholders in deciding what the corporation's best interests are. Parliament codified this in 2019 by adding section 122(1.1), which lists factors directors may consider: shareholders, employees, retirees and pensioners, creditors, consumers, governments, the environment, and the long-term interests of the corporation. Peoples Department Stores Inc (Trustee of) v Wise, 2004 SCC 68, had earlier held that the fiduciary duty does not shift to creditors when a corporation approaches insolvency, though the duty of care may be owed to creditors.

United States Delaware law places fiduciary duties of care and loyalty on directors, owed to the corporation and its shareholders. Shareholder wealth maximization is the orienting principle in a way it is not in Canada. Delaware layers on context-specific duties: Revlon duties to maximize immediate value once a sale of control becomes inevitable, Unocal proportionality review of defensive measures, and Caremark oversight obligations that make a sustained failure to monitor a breach of the duty of loyalty. Many states have adopted "constituency statutes" permitting consideration of other stakeholders, but Delaware has not.

5.4 The business judgment rule

Both countries protect honest, informed business decisions from being second-guessed with hindsight. In Delaware the business judgment rule operates as a strong presumption that directors acted on an informed basis, in good faith, and in the honest belief the action was in the company's best interests, which a plaintiff must rebut before the court will examine the merits. Canadian courts apply a functionally similar deference, asking whether the decision fell within a range of reasonable alternatives, but Canadian formulations treat it as a standard of review rather than a formal burden-shifting presumption. The practical outcomes converge more than the doctrinal framing suggests.

5.5 Shareholder remedies

5.6 Piercing the corporate veil

Separate legal personality holds in both countries and courts disturb it rarely. Canadian courts, following the Ontario formulation in Transamerica Life Insurance Co of Canada v Canada Life Assurance Co (1996), generally require complete domination of the subsidiary plus conduct akin to fraud. American courts apply alter-ego or instrumentality tests that vary by state and are, in aggregate, somewhat more willing to pierce, particularly in closely held companies with disregarded formalities and commingled funds. In both countries the practical protection is the same: maintain separate books, separate bank accounts, arm's-length intercompany terms, and real corporate records. Those are all things an accountant controls.

6Securities regulation and the reporting environment

The most consequential structural difference in the entire document, and the one that most directly governs the profession.

6.1 Who regulates

Canada There is no federal securities regulator. Each of the ten provinces and three territories has its own securities legislation and its own commission, of which the Ontario Securities Commission is the largest, with the Autorité des marchés financiers in Quebec, the Alberta Securities Commission, and the British Columbia Securities Commission also significant. They coordinate through the Canadian Securities Administrators, an umbrella body with no independent legal authority of its own, which develops National Instruments that each jurisdiction then adopts as its own rule. A passport system lets a filer deal with a principal regulator and have the decision recognized elsewhere, though Ontario does not participate and instead applies an interface arrangement.

This is not for want of trying. The Supreme Court struck down a proposed federal Canadian Securities Act in 2011 as exceeding the federal trade and commerce power. A subsequent Cooperative Capital Markets Regulatory System was held constitutional in a 2018 reference, but implementation work paused in 2021 and the system was never brought into force. [VERIFY] the current status if you need it for anything real; the file has been dormant rather than formally closed.

United States Federal primacy through the Securities and Exchange Commission, created under the Securities Exchange Act of 1934. The Securities Act of 1933 governs offerings and registration statements; the 1934 Act governs the secondary market, continuous reporting, and market conduct. State "blue sky" laws survive underneath, but the National Securities Markets Improvement Act of 1996 preempted much of their reach over covered securities. One regulator, one rulebook, one set of forms.

6.2 What issuers have to do

6.3 Civil liability for misleading disclosure

This is where an auditor's statutory exposure lives, and the two regimes are built on opposite compromises.

United States Under section 11 of the 1933 Act, an auditor who consents to the use of its report in a registration statement is liable to purchasers for material misstatements, with no requirement to prove reliance or scienter, subject to a due diligence defence the auditor must establish. Under section 10(b) and Rule 10b-5 of the 1934 Act, secondary market plaintiffs must prove scienter, meaning intent or recklessness, but they get the benefit of the fraud-on-the-market presumption of reliance from Basic Inc v Levinson in an efficient market, which is what makes class certification achievable. The Private Securities Litigation Reform Act of 1995 tightened pleading standards and introduced proportionate liability for defendants who did not knowingly violate the securities laws.

Canada Prospectus liability under provincial legislation (in Ontario, section 130 of the Securities Act) is broadly analogous to section 11. Secondary market liability came much later, through Part XXIII.1 of the Ontario Securities Act, in force 31 December 2005, with parallel provisions across the CSA jurisdictions. Its design is deliberately more restrictive than the American model:

• Leave of the court is required before an action can be commenced. The plaintiff must show the action is brought in good faith and has a reasonable possibility of success at trial, on a paper record, before any discovery. The Supreme Court has described the screen as a "robust deterrent" to unmeritorious claims.
• Statutory liability caps apply. For issuers, the greater of 5% of market capitalization or $1 million. For directors and officers, the greater of 50% of their aggregate compensation or $25,000. There is a separate cap for experts, including auditors, tied to the revenue earned from the issuer [VERIFY] the formula and figure directly in the statute before quoting it. The caps do not protect a defendant who authorized or acquiesced in a misrepresentation knowing it was false.
• Statutory defences exist for reasonable investigation, reliance on an expert, and forward-looking information accompanied by cautionary language and stated risk factors.
• Canadian courts have rejected fraud-on-the-market for the parallel common law negligent misrepresentation claims, so individual reliance must be proven, which limits what can be certified as a common issue.
• The limitation period runs to the earlier of three years from the misrepresentation and six months from the news release announcing that leave was granted, with the clock suspended while the leave motion is pending.

7Insolvency and secured lending

Federal statutes in both countries, sitting on top of sub-national security law in both countries. The restructuring processes are built on different philosophies.

7.1 The statutes

7.2 CCAA versus Chapter 11

Both processes stay creditor enforcement, keep management in place, and require a plan approved by creditors and sanctioned by the court. The differences are in how much the statute dictates and who watches the debtor.

8Employment

The largest single divergence in day-to-day commercial consequence, and the one most likely to distort a cross-border model.

8.1 At-will and its absence

United States Employment is at will in nearly every state, meaning either party may end the relationship at any time, for any reason or no reason, without notice or payment. Montana is the recognized exception, having replaced at-will with a statutory good-cause regime. The at-will default is cut back by exceptions that vary by state, including public policy limits, implied contract from handbooks or conduct, and in some states an implied covenant of good faith. A federal statutory overlay prohibits discrimination on protected grounds (Title VII, ADEA, ADA), sets wage and hour rules (FLSA), and requires advance notice of mass layoffs (WARN).

Canada At-will employment does not exist. An indefinite-term employee dismissed without cause is entitled to reasonable notice of termination or pay in lieu. Two separate entitlements stack. Employment standards legislation, such as Ontario's Employment Standards Act, 2000, sets a statutory floor of notice and, above a threshold, severance pay. Above that floor, the common law implies a term of reasonable notice whose length is assessed on the Bardal factors: character of employment, length of service, age, and availability of similar employment. Long-service senior employees routinely receive notice periods measured in many months. A written contract can limit the entitlement to the statutory minimum, but Canadian courts read termination clauses strictly and strike them down readily, in which case the common law entitlement revives in full.

Just cause in Canada is a high bar reserved for misconduct that fundamentally repudiates the employment relationship, and an employer who alleges it and fails pays the full notice entitlement anyway. Constructive dismissal arises where the employer unilaterally makes a fundamental change to the terms of employment, which lets the employee treat the contract as terminated and claim notice.

8.2 Employee versus independent contractor

Both countries police this boundary hard because it drives payroll withholding, benefits, and employment protections, and both use multi-factor control-and-integration tests rather than the parties' label. Canada asks about control, ownership of tools, chance of profit and risk of loss, and integration into the business, and recognizes an intermediate dependent contractor category entitled to reasonable notice, which the United States does not have in the same form. The CRA and the IRS both apply their own tests for tax purposes that do not necessarily align with the employment-law characterization, so an individual can be a contractor for one purpose and an employee for another.

9Tax law as law

You already know Canadian tax. This section is about the legal architecture around it, and about the American structure you have not been trained in.

9.1 Architecture

9.2 Anti-avoidance: the two approaches

Both countries police the gap between the letter of the tax law and its purpose, and they reached the same destination by opposite routes. Canada legislated a general rule in 1988; the United States developed judicial doctrines first and codified one of them in 2010.

Canada The general anti-avoidance rule in section 245 of the Income Tax Act denies a tax benefit arising from an avoidance transaction that constitutes a misuse or abuse of the Act read as a whole. It was materially strengthened by amendments that received royal assent on 20 June 2024:

• An interpretive preamble was added, directing that GAAR applies to abusive avoidance while preserving legitimate planning.
• The avoidance transaction threshold moved from a transaction undertaken primarily for tax purposes to one where obtaining the tax benefit is one of the main purposes. This widens the net considerably.
• A transaction significantly lacking economic substance now tends to indicate abuse.
• A 25% penalty on the additional tax was introduced, avoidable by disclosure under the mandatory disclosure rules or by voluntary disclosure by the filing deadline.
• The reassessment period is extended by three years for GAAR assessments absent prior disclosure.

Most of the amendments apply to transactions occurring on or after 1 January 2024, with the preamble and penalty operating from royal assent. [VERIFY] the precise coming-into-force rule for any particular provision against the enacting legislation before applying it to a real file.

United States No general anti-avoidance rule. Instead, a set of judicial doctrines: substance over form, step transaction, sham transaction, business purpose, and the economic substance doctrine. Congress codified the last of these in IRC § 7701(o), which requires that a transaction both change the taxpayer's economic position in a meaningful way apart from tax effects and serve a substantial non-tax purpose. The penalty structure under § 6662 is the aggressive part: 20% where the transaction was adequately disclosed, and 40% on a strict liability basis where it was not, with no reasonable cause defence available for the 40% penalty. Litigation continues over the threshold question of when the doctrine is even "relevant" to a transaction, so this is an active area rather than a settled one.

9.3 Privilege: the difference that can end a career

This is the item on this page with the sharpest practical edge for an accountant, and it is the one most often misunderstood.

10Regulation of the profession

Who lets you practise, who can take it away, and what obligations attach to the licence.

10.1 Licensing

Canada Regulation is provincial. CPA Ontario, operating under Ontario legislation, admits members and separately licenses public accounting, which is a distinct authorization from the CPA designation itself. CPA Canada is a national body that supports the profession and, through the Accounting Standards Board and Auditing and Assurance Standards Board, oversees the standard-setting that populates the CPA Canada Handbook. It is not a regulator. Discipline, licensing, and practice inspection sit with the provincial body.

United States Regulation is by state boards of accountancy, fifty of them plus territories, coordinated through NASBA and guided by the Uniform Accountancy Act. Licensure requires the Uniform CPA Examination plus state-specific education and experience requirements that are not uniform. CPA mobility provisions allow a licensee in good standing in one state to practise in another without a second licence, but the scope and conditions vary and the model has been under active legislative revision in several states. Standard setting is split: the FASB sets US GAAP, the AICPA's Auditing Standards Board sets standards for non-issuer audits, and the PCAOB sets them for issuer audits.

10.2 Anti-money laundering obligations

Both countries impose AML duties on accountants, and in both cases the trigger is handling or directing the movement of value, not giving advice.

Canada Under the Proceeds of Crime (Money Laundering) and Terrorist Financing Act and its regulations, accountants and accounting firms become reporting entities to FINTRAC when they engage in, or give instructions on behalf of a client in respect of, receiving or paying funds or virtual currency, purchasing or selling securities, real property or business assets, or transferring funds, virtual currency or securities. Compensation is irrelevant to the trigger. Audit, review, and compilation engagements are excluded. Once captured, the obligations are a compliance programme, client identification and beneficial ownership verification, politically exposed person determinations, ongoing monitoring, record keeping, and reporting of suspicious transactions, terrorist property, and large cash or virtual currency transactions. Administrative monetary penalties follow non-compliance.

The distinction between advising and instructing does the work. Recommending a course of action is advice. Directing the movement of the funds is an instruction, and it is what brings the firm inside the regime.

United States The Bank Secrecy Act framework administered by FinCEN historically did not treat accountants as a covered financial institution in the way Canada does, and the obligations that reach accountants arrive indirectly, through client-side requirements, IRS Form 8300 cash reporting, and beneficial ownership reporting rules. [VERIFY] the current scope of US obligations, including the beneficial ownership reporting regime, which has changed repeatedly and is not a stable target.

11Procedure and litigation risk

Two countries with similar substantive law generate litigation on different scales, because procedure decides who can afford to sue.

12Translation table

Terms that look interchangeable and are not. Learn these as pairs, not as synonyms.

13Where to look things up

Free, authoritative, and worth bookmarking. Secondary summaries are for orientation; primary sources are for anything you will act on.

14What is flagged, and why

Everything in this document marked [VERIFY] in one place, so you can clear the list rather than hunt through the text.

1. Hercules, full reasons. Every access route to the full judgment was blocked in this session (CanLII by robots policy, the SCC site returned an error). The description in section 4.3 rests on secondary case summaries. The holding is well settled, but read the reasons yourself at [1997] 2 SCR 165 before quoting the Court's language.
2. Rosas v Toca outside British Columbia. Whether contract variation without fresh consideration is good law in Ontario or your province is not settled by a BC appellate decision.
3. Limitation of liability clauses in US professional engagements. State-by-state, and some states restrict them for audits specifically.
4. US LLCs for Canadian tax purposes. Treatment and treaty entitlement have been contested. Check the current CRA administrative position.
5. Director residency requirements. Ontario removed its Canadian-resident director requirement; the CBCA and other provinces differ. Confirm per jurisdiction.
6. Cooperative Capital Markets Regulatory System. Implementation paused in 2021 rather than formally terminated. Confirm the current position before describing it as dead.
7. PCAOB mandate. Its elimination was proposed in 2025 and removed from the bill on procedural grounds; a new chairman and board were named on 30 January 2026. The mandate is under active reconsideration.
8. Part XXIII.1 expert liability cap. I confirmed the issuer cap (greater of 5% of market capitalization or $1 million) and the director and officer cap (greater of 50% of compensation or $25,000) but not the formula for experts. Read section 138.1 and the liability limits provisions in the Securities Act (Ontario) directly.
9. GAAR coming-into-force detail. Different amendments in the 2024 package have different effective dates. Confirm per provision.
10. Privilege by lawyer retainer in Canada. Whether an accountant's work is protected when engaged through counsel depends on how the retainer is structured and the case law is fact-specific.
11. IQEX and US licensure for Canadian CPAs. Eligibility rules and participating boards change. Confirm with NASBA and the specific state board.
12. US AML scope for accountants. Including the beneficial ownership reporting regime, which has moved repeatedly.

15Sources

Primary and secondary material consulted in preparing this document.

• Government of Canada, The constitutional distribution of legislative powers
• Department of Justice Canada, The Fundamentals of Bijuralism
• Canadian securities regulation (overview)
• Hercules Managements Ltd v Ernst & Young, 1997 CanLII 345 (SCC)
• Deloitte & Touche v Livent Inc (Receiver of), 2017 SCC 63 (CanLII)
• Deloitte & Touche v Livent Inc, case overview
• Bily v Arthur Young & Co, 3 Cal. 4th 370 (1992), Justia
• Canada Business Corporations Act, s. 122, Justice Laws
• Audit Analytics, Canadian Controls: What is Disclosed and What is Not (NI 52-109 vs SOX 404)
• OSC, National Instrument 52-110 Audit Committees
• Osler, Defending Securities Class Actions in Canada
• McMillan, Bears v Bulls: Secondary Market Securities Class Actions in Ontario
• Blakes, Chapter 11 and CCAA: A Cross-Border Comparison
• Doane Grant Thornton, Significant changes to GAAR
• Canadian Tax Foundation, GAAR in 2024 and Beyond
• Crowe, Codified Economic Substance: 5 Things to Know (IRC 7701(o), 6662)
• EisnerAmper, IRC Sec. 7525 Federally Authorized Tax Practitioner Privilege
• Fasken, The Only Way to Keep Tax Planning Confidential (privilege in Canada)
• FINTRAC, Accountants and accounting firms
• SEC, Press Release 2026-16: SEC Appoints New Chairman and Board Members of PCAOB
• Journal of Accountancy, Elimination of PCAOB can't remain in budget bill
• BLG, Bill 161: sweeping changes to Ontario's Class Proceedings Act
• Dickinson Wright, Canadian and US Litigation Differences
• Aird & Berlis, What American Employers Should Know About Canadian Employment Law
• Stikeman Elliott, Directors' Duties in Canada: Six Key Concepts
• Blakes, CBCA Amendments Codify Best Interests Considerations
• Oppression remedy in Canadian corporate law (overview)
• Becker, Dual certification for Canadian CPAs: IQEX explained
• Canadian Public Accountability Board