The Canadian legal system

Engineers do not need to become lawyers, but they do need a working map of the legal system. When a client sends a contract, when a regulator opens a file, when a site accident triggers an investigation or when a bridge owner sues, the engineer who understands where the rules come from, which court will hear the case and what the other side must prove is far better placed to protect the public, the firm and themselves. This lesson draws that map.

Canada has two legal traditions. Quebec private law is based on the civil law tradition, codified in the Civil Code of Québec, while the other provinces and territories, and federal law, follow the common law tradition inherited from England. Over both sits a written constitution that divides power between Parliament and the provinces and protects rights through the Canadian Charter of Rights and Freedoms. Indigenous legal orders, and the constitutional protection of Aboriginal and treaty rights in section 35 of the Constitution Act, 1982, add a third strand that matters a great deal for infrastructure projects.

As in lesson 1, nothing here is legal advice. It is a general description meant to help you recognize issues and talk to lawyers usefully.

Sources of law

Law comes from a small number of sources, ranked in a clear order. When two rules conflict, the higher source wins.

At the top is the Constitution. The Constitution Act, 1867 divides legislative power: Parliament has authority over matters such as criminal law, navigation and shipping, interprovincial railways and works, and federal lands, while the provinces have authority over property and civil rights, local works, municipal institutions and the regulation of professions. That is why your licence is provincial, why most construction and contract law is provincial, and why a bridge over a navigable river may also need federal approval under the Canadian Navigable Waters Act. The Charter protects rights such as freedom of expression and equality against government action; it rarely touches private contracts but can matter when an engineer's speech is disciplined by a regulator.

Next come statutes: acts passed by Parliament or a provincial legislature, such as a provincial engineering act, an occupational health and safety act, a builders' lien act or the federal Impact Assessment Act. Statutes often authorize regulations, detailed rules made by cabinet or a minister, such as the regulations under a professional engineers act that set out licensing requirements and the code of ethics. Building codes are a special case: the National Building Code of Canada is a model code with no force of its own until a province adopts it, with or without changes, as a regulation. Municipal bylaws, made under authority delegated by the province, sit below provincial law.

Finally there is case law, the body of rules made by judges when they decide disputes. In the common law tradition, judges do more than apply statutes; they develop whole areas of law, such as contract and negligence, case by case. Judges also interpret statutes and decide whether laws are constitutional, and those interpretations become part of the law.

Precedent and how judges make law

The doctrine of precedent, often called by its Latin name stare decisis, means that courts follow earlier decisions on the same legal point. A lower court must follow a decision of a higher court in the same hierarchy. A court is usually expected to follow its own earlier decisions too, although top appellate courts can depart from them. Decisions from other jurisdictions are persuasive but not binding: a court may adopt reasoning from another province, state or country if it finds it convincing.

The binding part of a decision is the ratio decidendi (or holding): the legal principle needed to decide the case on its material facts. Comments that were not necessary to the result are obiter dicta, which may be influential but do not bind. Lawyers argue about which facts were material, so they can either apply a precedent to a new case or distinguish it as different. When you read a summary of a famous engineering case in this course, focus on the rule and the facts that mattered.

The civil law tradition works differently. In Quebec, the Civil Code is the primary source of private law, and judges reason from its general provisions; earlier decisions are respected and influential but do not bind in the same formal way. Quebec engineers also work under the Code's specific rules on contracts for services and enterprise, including the solidary liability of architects, engineers and contractors for the loss of a work within five years of completion, set out in article 2118.

The courts

Canada has a unified court hierarchy with the Supreme Court of Canada at the top. Each province has superior trial courts (for example, the Court of King's Bench in Saskatchewan and Alberta, the Superior Court of Justice in Ontario, and the Supreme Court of British Columbia), provincial courts for smaller civil claims and most criminal matters, and a court of appeal. The Supreme Court of Canada hears appeals from every provincial court of appeal, but only with leave, and it grants leave in a small number of cases of national importance. The Federal Court and Federal Court of Appeal handle specific federal matters such as intellectual property and judicial review of federal agencies.

Public law and private law

Law is often divided into public law, which governs the relationship between people and the state, and private law, which governs relationships between private parties. Criminal law, constitutional law, administrative law and regulatory offences are public law. Contract, tort and property law are private law. Engineers meet both: a collapse can lead to a regulatory prosecution under safety legislation, a discipline hearing before the engineering regulator and a private lawsuit for damages, all arising from the same facts.

The three proceedings have different purposes, different parties and different standards of proof. A prosecution is brought by the state to punish and deter. A discipline hearing is brought by the regulator to protect the public. A civil action is brought by the injured party to obtain compensation. Each is decided on its own evidence, and an engineer may win one and lose another.

Canadian criminal law is federal and found mainly in the Criminal Code. After the Westray mine explosion in Nova Scotia in 1992, which killed 26 miners, Parliament added section 217.1 to the Criminal Code in 2004. It imposes a legal duty on anyone who directs how work is done to take reasonable steps to prevent bodily harm, and it lets organizations be convicted of criminal negligence through the conduct of their senior officers. Most workplace safety prosecutions, though, are regulatory offences under provincial occupational health and safety acts. These are usually strict liability offences: the prosecutor need only prove that the prohibited act happened, and the accused avoids conviction only by proving due diligence, that it took all reasonable care, on a balance of probabilities. That rule comes from the Supreme Court of Canada's 1978 decision in R. v. Sault Ste. Marie.

Administrative law and the regulators

Much of the law that touches engineers is administered by agencies and tribunals rather than courts: licensing bodies, safety regulators, environmental agencies, labour boards and municipal permit offices. Administrative law sets the rules for how these bodies must act. They must stay within the powers their statute gives them, follow fair procedures (notably, giving a person a fair hearing before deciding against them) and make decisions that can be justified.

When an engineer disagrees with a regulator's decision, the usual route is an appeal if the statute provides one, or an application to court for judicial review. Since the Supreme Court of Canada's 2019 decision in Canada (Minister of Citizenship and Immigration) v. Vavilov, courts presume that the standard of review is reasonableness: the court asks whether the decision is justified, transparent and intelligible, not whether it would have reached the same answer. Correctness review applies to a limited set of questions, such as constitutional issues, and where the legislature provides a statutory appeal, appellate standards apply. In practice, this means discipline decisions by an engineering regulator are hard to overturn unless the process was unfair or the reasoning does not hold together.

Engineers working on infrastructure also need to know about the Crown's duty to consult. The Supreme Court of Canada held in Haida Nation v. British Columbia (2004) that when the Crown contemplates conduct that might adversely affect an Aboriginal or treaty right, whether proven or credibly asserted, it has a duty to consult and, where appropriate, accommodate the affected Indigenous peoples. The duty belongs to the Crown and cannot be delegated away, but the procedural parts of consultation are often carried out by project proponents and their consultants, including engineers, who gather information, present design options and modify designs to reduce impacts. Getting this wrong can delay or halt a project; getting it right builds relationships that last beyond it.

Limitation periods

A limitation period is the deadline for starting a lawsuit. Miss it and the claim is lost, however strong it is. Most provinces now have a general limitations statute with a basic period, typically two years from when the claimant discovered, or ought to have discovered, the injury, its cause and the identity of the person responsible, and an ultimate period, often 15 years from the act or omission, after which no claim may be brought regardless of discovery. Saskatchewan's Limitations Act follows that two-year and 15-year pattern; Ontario's Limitations Act, 2002 does too. Quebec's general period is three years. These periods can be suspended or extended in specific circumstances, and some statutes and contracts create their own deadlines, so lawyers always check the specific rules.

Engineers care about limitation periods for two reasons. First, they determine how long the firm is exposed to claims after a project ends, which affects insurance and record keeping. Second, they decide whether a claim the firm wants to bring, such as an unpaid fee, is still alive. The short program below calculates the last day to sue for three defects on the bridge under assumed rules. Real deadlines need a lawyer.

from datetime import date

# Assumed limitation rules for the example (check the current statute):
BASIC_YEARS = 2       # basic period runs from discovery
ULTIMATE_YEARS = 15   # ultimate period runs from the act or omission

def add_years(d, n):
    try:
        return d.replace(year=d.year + n)
    except ValueError:            # February 29
        return d.replace(year=d.year + n, day=28)

def deadline(act, discovered):
    basic = add_years(discovered, BASIC_YEARS)
    ultimate = add_years(act, ULTIMATE_YEARS)
    return min(basic, ultimate), basic, ultimate

claims = [
    ("Cracked deck coating", date(2027, 9, 30), date(2031, 4, 12)),
    ("Bearing corrosion", date(2027, 9, 30), date(2041, 6, 1)),
    ("Railing vibration", date(2027, 9, 30), date(2028, 2, 3)),
]
for name, act, found in claims:
    last, basic, ult = deadline(act, found)
    rule = "basic" if last == basic else "ultimate"
    print(f"{name:22} discovered {found}  last day to sue {last} ({rule} period)")

Cracked deck coating   discovered 2031-04-12  last day to sue 2033-04-12 (basic period)
Bearing corrosion      discovered 2041-06-01  last day to sue 2042-09-30 (ultimate period)
Railing vibration      discovered 2028-02-03  last day to sue 2030-02-03 (basic period)

The bearing corrosion claim shows how the ultimate period works: although the corrosion was discovered in 2041, the ultimate period, counted from completion in 2027, ended in 2042, which is earlier than the two-year basic period would allow. In a province with no ultimate period, or if the defect had been concealed, the answer could differ.

Working with lawyers

Engineers and lawyers work together often: on contracts, claims, investigations, expert evidence and regulatory compliance. A few habits make the relationship productive. Bring the lawyer in early, before you sign a contract with unusual terms or respond to a claim letter, not after. Give the lawyer the facts, the documents and the technical background, including the facts that hurt. Understand that communications with your lawyer for the purpose of legal advice are usually protected by solicitor-client privilege (in the US, attorney-client privilege), but that ordinary business records, including project emails, are not, and may be disclosed in litigation. Write project correspondence as if a judge will read it, because one may.