Arbitration Board — Ontario Employment Law

8 casesDecisions from 1967–1989

About Arbitration Board

In unionized workplaces across Ontario, labor disputes are rarely decided in a traditional courtroom. Instead, under the Ontario Labour Relations Act, 1995, collective agreements must include a mechanism for the final and binding settlement of disputes. The specialized adjudicative body that hears and resolves these disagreements is known as an arbitration board.

An arbitration board can take two main forms. Most commonly today, it consists of a single, neutral arbitrator who acts as the entire board. However, for particularly complex or highly contentious disputes, parties may use a tripartite arbitration board. In this three-person setup, the union appoints one side-person (a nominee), the employer appoints a second nominee, and those two select a neutral chairperson. The nominees bring specialized industry perspectives to the table, though the neutral chairperson ultimately holds the deciding vote if a consensus cannot be reached.

Arbitration boards wield significant authority in the workplace. Their primary role is to interpret and apply the provisions of a collective agreement—such as seniority rights, work-load provisions, or calculating fringe benefits. However, their power extends beyond the four corners of the contract. In Ontario, an arbitration board has the statutory authority to interpret and apply employment-related laws, including the Employment Standards Act, 2000 (ESA) and the Human Rights Code, even if those statutes are not expressly written into the collective agreement. Furthermore, if an arbitration board finds that an employee was disciplined or dismissed without just cause, they often possess the power to substitute a lesser penalty, such as converting a termination into a suspension.

Because an arbitration board's ruling is meant to be final and binding, challenging one is difficult. Unionized employees generally cannot bypass the board and sue their employer in civil court. If a party believes the board made a fundamental legal error, they must seek a "judicial review" at the Ontario Divisional Court. Keep in mind that courts are highly deferential to arbitration boards; they will typically only overturn a decision if it is deemed legally "unreasonable" or if the board exceeded its jurisdiction. Given the complexities of tripartite panels, union representation rules, and the high threshold for judicial review, unions and employers must carefully assess their legal strategy with specialized counsel before advancing a grievance to a board.

Frequently Asked Questions

What is the difference between an arbitrator and an arbitration board?

While the terms are often used interchangeably, a single arbitrator is one individual appointed to resolve a dispute, whereas a traditional arbitration board is a three-person panel (tripartite board). A tripartite board includes a union nominee, an employer nominee, and a neutral chairperson who makes the final ruling if the nominees disagree.

Does an arbitration board only look at the collective agreement?

No. Under Ontario labour law, an arbitration board also has the authority and responsibility to apply minimum statutory standards. For example, they must ensure the employer's actions comply with the Employment Standards Act, 2000 and the Ontario Human Rights Code, integrating these legal principles directly into their analysis.

Can an arbitration board overturn an employer's decision to fire someone?

Yes. If an arbitration board reviews the evidence and determines that an employee committed misconduct but termination was too severe an employer response, the board has the statutory power to substitute a lesser penalty, such as a temporary suspension without pay, and reinstate the worker.

Is the decision made by an arbitration board completely final?

Arbitration board decisions are intended to be final and binding, meaning you cannot simply appeal because you dislike the outcome. However, a decision can be challenged in court through a process called "judicial review" if the board acted unreasonably, showed bias, or exceeded its legal jurisdiction.

As an individual union member, can I personally appeal the board's decision to a court?

In most cases, the union "owns" the grievance and is the legal party to the arbitration. Therefore, it is generally up to the union, not the individual worker, to decide whether to invest the resources and time strictly required to seek a judicial review of an arbitration board's decision.

How long do we have to challenge an arbitration board's ruling through judicial review?

While there isn't a strict statutory deadline for filing a judicial review of a labour arbitration decision in Ontario, the courts expect applications to be brought promptly—usually within 30 days of the board's decision. Delays in seeking judicial review can result in the court dismissing the application.

When should we get a lawyer involved for a board hearing?

Legal counsel should ideally be involved during the initial selection of the board or arbitrator, as standardizing the procedure and picking a chair with the right industry expertise is vital. You definitely need a lawyer to assess the viability of filing for a judicial review, as it requires arguing complex standards of administrative law in court.

Common Scenarios

  • A school board and a teachers' union disagree over whether the employer is required to reimburse legal costs for a worker acquitted of criminal charges. The dispute goes to a three-person arbitration board, which must carefully interpret precise language in the collective agreement against the backdrop of the Education Act.
  • A single-arbitrator board hears a grievance regarding holiday pay calculations for part-time nurses. The board must determine if the specific formula used in the collective agreement falls short of the mandatory minimums outlined in the Employment Standards Act, 2000.
  • A unionized manufacturing employee loses their seniority and the employer argues they have reverted to probationary status. The union advances the case to an arbitration board to resolve the conflicting interpretations of the contract's seniority tracking provisions.
  • Following a deeply contentious ruling on overtime calculation methods, an employer believes the arbitration board ignored the express language of the contract. The employer applies to the Ontario Divisional Court for a judicial review, asking a judge to legally quash the board's decision as unreasonable.

What You Should Know

  • When facing a complex industry-specific dispute, consider pushing for a tripartite arbitration board rather than a single arbitrator, as the union and employer nominees can help quietly guide the neutral chair on industry norms.
  • If you lose at arbitration, do not assume you can easily appeal; courts give high deference to arbitration boards and will only overturn decisions that lack a rational chain of analysis or break the law.
  • Always ensure that any human rights or Employment Standards Act violations are explicitly raised during the grievance process, so the arbitration board clearly knows it has the jurisdiction to rule on those statutory issues.
  • If a board issues a decision that you believe exceeds their jurisdiction, consult an administrative law practitioner immediately, as courts expect judicial review applications to be filed without undue delay.

Featured Cases

O.P.S.E.U. v. Seneca College (Div. Ct.)

1989 CanLII 4164 (ON SC) · 1989-04-10

Judicial Review of Arbitration Board Decision in Collective Agreement Dispute

A judicial review of an arbitration board's decision in a collective agreement dispute, where the board found the employer breached the agreement by using a rolling average method instead of a fixed weekly maximum method. The board refused to issue a declaration or compensation, citing union conduct and lack of employer intent. The court found the board's decision patently unreasonable and granted judicial review.

arbitration board collective agreements judicial review labour and employment work-load provisions

Metropolitan Separate School Board v. C.U.P.E. Local 1280 (Div. Ct.)

1988 CanLII 4564 (ON SC) · 1988-04-19

Collective Agreement Dispute: Legal Costs Reimbursement for Employee Acquitted of Employment-Related Charge

A merits decision involving a dispute over whether a school board was required to reimburse an employee's legal costs under a collective agreement after the employee was acquitted of a sexual assault charge related to employment. The arbitration board's interpretation of the collective agreement was upheld as reasonable and consistent with the Education Act.

arbitration board collective agreements education act labour and employment reimbursement of legal costs

Re I.C.L. International Carriers Ltd. and Teamsters Union, Locals 141, 879, 880 and 938

1984 CanLII 1989 (ON SC) · 1984-11-20

Labour Dispute: Arbitration Board's Authority to Substitute Penalty for Dismissal

A labour dispute involving the interpretation of a collective agreement's disciplinary provisions and the arbitration board's authority to substitute a penalty for dismissal. The case also examines the admissibility of prior infractions and the standard of review for arbitration board decisions under the Canada Labour Code.

arbitration board canada labour code collective agreements grievance arbitration labour and employment

Re Hotel Dieu Hospital and Ontario Nurses' Association

1984 CanLII 1970 (ON SC) · 1984-05-25

Collective Agreement Dispute: Arbitration Board Exceeds Jurisdiction in Holiday Pay Case

A judicial review case concerning whether an arbitration board erred in interpreting a collective agreement by incorporating provisions of the Employment Standards Act, specifically regarding holiday pay for regular part-time nurses. The board's decision to grant holiday pay was quashed for exceeding its jurisdiction by ignoring express provisions of the agreement.

arbitration board collective agreements employment standards act fringe benefits labour and employment

Re United Glass & Ceramic Workers of North America et al. and Libbey-St. Clair Inc. et al.

1981 CanLII 1728 (ON SC) · 1981-09-25

Collective Agreement Dispute: Seniority and Management Rights Review

A labor and employment case involving disputes over the interpretation of a collective agreement regarding seniority, probationary status, and management rights. The court reviewed whether an employee who lost seniority reverted to probationary status and whether an employer's decision to deny a leave of absence for an employee serving a jail sentence was subject to reasonableness review. The arbitration board's interpretation of the collective agreement was partially found unreasonable, and the decision was quashed and remitted for reconsideration.

arbitration board collective agreements labour and employment management rights seniority

Re Canadian Union of General Employees and Toronto Western Hospital

1973 CanLII 610 (ON SC) · 1973-05-31

Hospital Labour Dispute: Arbitration Board Jurisdiction

A labour relations dispute involving the Canadian Union of General Employees and Toronto Western Hospital, focusing on the jurisdiction of the arbitration board under the Hospital Labour Disputes Arbitration Act, s. 6(1).

arbitration board hospital dispute hospital labour disputes arbitration act labour relations

Re Hamilton Street Railway Co. and Amalgamated Transit Union, Division 107

1971 CanLII 440 (ON SC) · 1971-10-28

Collective Agreement Penalty: Arbitration Board Dismissal Quashed

A merits decision involving the interpretation of a collective agreement and the Labour Relations Act, where the arbitration board's reinstatement of an employee was quashed for erroneously substituting a lesser penalty in place of a specified dismissal for reporting to work with an alcoholic breath.

arbitration board collective agreements employment contract labour relations specific penalty

Regina v. Barber et al., Ex parte Warehousemen and Miscellaneous Drivers' Union Local 419

1967 CanLII 321 (ON SC) · 1967-08-08

Collective Agreement Interpretation: Part-Time Employee Benefits Dispute

A labour and employment case involving the interpretation of a collective agreement and whether part-time employees are entitled to benefits under it. The court reviewed whether the Arbitration Board exceeded its jurisdiction by using extrinsic evidence to interpret unambiguous provisions of the agreement, with the decision being quashed and remitted for reconsideration.

arbitration board collective agreements employee benefits interpretation labour and employment