Offshore Employers Association Limited v Construction, Forestry and Maritime Employees Union [2026] FCA 134

This case started with a practical payroll and entitlement disagreement, but it turned into a much larger argument about the limits of Fair Work Commission arbitration. Cyan Vessel Operations Pty Ltd, formerly known as MMA Offshore Vessel Operations Pty Ltd, was covered by an enterprise agreement in the offshore oil and gas industry. That agreement included a dispute resolution procedure in clause 10 and a long service leave clause in clause 39.2.

The long service leave clause said that an employee who had completed at least 10 years' continuous service with the employer was entitled to 13 weeks' long service leave, with further leave after each additional five years. It also said that the entitlement would operate prospectively from the approval date of the agreement. The commercial problem was obvious. Did that wording mean the more generous entitlement only accrued on service after the agreement was approved, or did it apply once an employee reached 10 years' service after approval even if much of that service had been completed earlier?

The immediate trigger was Mr Geoffrey Ammon. Cyan's employee relations manager emailed him on 4 February 2025 and explained the company's position. Cyan said the clause operated prospectively, not retrospectively, so service before 6 December 2023 did not attract the higher rate. Mr Ammon initially replied that he understood. But later that day, a union official said the union did not agree and indicated the matter was part of a current dispute before the Fair Work Commission.

On 14 February 2025, the union filed a Form 10 application in the Commission under the enterprise agreement's dispute procedure and s 739 of the Fair Work Act. That application did not describe the dispute in broad workforce terms. It said the dispute arose with respect to the long service leave entitlements for Geoffrey Ammon. It then set out the employer's position on his leave balance and said the union did not agree.

The judgment places strong emphasis on the statutory setting. That matters because the Fair Work Commission is not a court exercising the judicial power of the Commonwealth. It can deal with disputes only where the Fair Work Act authorises it to do so, and in this case that authority depended on the enterprise agreement's dispute resolution clause together with ss 595 and 739 of the Fair Work Act.

Clause 10.1 of the enterprise agreement set out a stepped dispute resolution procedure. A matter first had to be discussed at workplace level, then escalated through representatives, and only if unresolved could a person bound or covered by the agreement, including the union, refer the dispute to the Commission for conciliation and or arbitration. Clause 10.2 then authorised the Commission to deal with the dispute in two stages, including by arbitration, and to make a binding determination on the parties to the dispute. Clause 10.4 said the parties agreed to be bound by a decision made by the Commission in accordance with that clause, subject to appeal rights.

That framework was critical. The Court was not simply asking what the best interpretation of clause 39.2 might be in the abstract. It was asking what dispute had actually gone through the agreed process and been referred to the Commission. The answer to that question controlled the scope of the Commission's arbitral function and the legal effect of its award.

The Court also referred to the constitutional distinction between arbitration and judicial power. The Commission may form legal views when doing something within its own power, but it cannot issue a binding declaration on a legal issue detached from the dispute it is authorised to determine. In practical terms, that means a broad legal question asked later in the process does not automatically enlarge the dispute if the original referral was narrower.

One of the most useful parts of the judgment for business readers is the procedural story. Cyan initially responded to the union's Form 10 by challenging jurisdiction. In that application, Cyan itself described the dispute as one about Mr Ammon's present entitlement to long service leave and the correct quantum of that entitlement. Cyan also argued at that stage that the Commission was not the appropriate forum to declare individual employee long service leave accruals. Later, however, Cyan informed the Commission that it did not press the jurisdictional objection.

There was also reference to a related matter called the 'Lucas' matter', but the judgment does not explain that matter in detail. What the reasons do show is that the parties and the Commission were aware that the long service leave issue had broader significance in the industry. An email from Cyan's solicitor described the key contested question in the Ammon matter as whether clause 39.2's more generous long service leave entitlements applied prospectively upon future accruals or applied to employees' existing periods of continuous employment before the agreement commenced.

Then the procedural framing became broader. On 14 March 2025, the union proposed questions for arbitration asking what the final sentence of clause 39.2 meant. The proposed alternatives were framed generally, not by reference to Mr Ammon. On 17 March 2025, Cyan's solicitor said the client was comfortable with those questions, and on 18 March 2025 the Deputy President directed that the question to be resolved would be in those terms.

The written submissions before the Commission also focused heavily on the proper construction of clause 39.2 in general terms. The union's submissions did not mention Mr Ammon. Cyan's submissions began with facts specific to Mr Ammon's service, but the final answer it sought to the arbitration question was also framed generally. The hearing transcript in evidence did not mention Mr Ammon, although the Court noted the transcript was incomplete and declined to infer more than the evidence supported.

Finally, the Commission's arbitral decision of 9 June 2025 did not mention Mr Ammon. It stated the question for determination in general terms and concluded that an employee who reaches 10 years of continuous service after the approval date of the agreement is entitled to 13 weeks of long service leave. That set up the Federal Court fight. Did the general wording of the arbitration question and the arbitral reasons mean the award bound Cyan for all employees, or was the award still confined to the dispute originally referred about Mr Ammon?

Jackson J answered the preliminary question in favour of Cyan's narrower position. The Court ordered that the arbitral award made by the Fair Work Commission on 9 June 2025 bound Cyan only in so far as it concerned the entitlements of Mr Geoffrey Ammon under clause 39 of the enterprise agreement. In other words, the award was not treated as binding across all employees covered by the agreement.

The catchwords and reasons show that the Court's conclusion turned on the proper characterisation of the arbitral dispute and the nature and limits of the Commission's statutory function. The Court accepted that the Commission can arbitrate disputes where the parties have agreed, through an enterprise agreement and the Fair Work Act, to submit those disputes to it. But the Commission cannot use that arbitral role to make a binding declaration on a legal issue detached from the dispute actually referred.

That is why the original Form 10 mattered so much. It expressly said the dispute arose with respect to Mr Ammon's long service leave entitlements. Cyan's own early jurisdictional material also described the dispute as the correct quantum of Mr Ammon's entitlement. Although the parties later agreed on broader questions for arbitration, the Court held that this did not transform the dispute into a broader arbitral controversy of the kind the union contended for.

The Court's catchwords also indicate that it rejected the idea that the parties had expanded the scope of the dispute by consent after referral in a way that would support an enterprise-wide binding outcome. So even though the Commission's reasons were expressed generally and did not mention Mr Ammon, the legal effect of the award remained tied to the dispute that had actually been referred and processed under the agreement.

The case was not only about the preliminary question. It also involved an interlocutory application about who should be parties to the Federal Court proceeding. Offshore Employers Association Limited was removed as an applicant. Cyan then became the first applicant, and the Court joined several additional employers as applicants: Bhagwan Marine Limited, Fugro Australia Pty Ltd, GO Offshore Pty Ltd, Jetwave Marine Services Pty Ltd, OSM Australia Pty Ltd, Programmed Offshore Pty Ltd and Solstad Australia Pty Ltd.

The Court made those orders under rules 9.05 and 9.08 of the Federal Court Rules. The catchwords say joinder would enable determination of related disputes. The reasons also note that the significance of some jurisdictional arguments diminished once the further applicants were joined, because on any view they were unaffected by the particular arbitral award concerning Cyan and Mr Ammon.

That procedural point is commercially important. It shows how a dispute that begins with one employee and one employer can still raise broader industry questions, especially where similar enterprise agreement wording appears across multiple employers. But it also shows that a narrow arbitral award in one employer's dispute may not settle the position for everyone else. Joined court proceedings may still be needed where several businesses want clarity on common wording.

The procedural background also explains why the preliminary question mattered. Cyan had appealed the arbitral decision to the Commission's Full Bench, but then commenced the Federal Court proceeding and obtained an injunction restraining the Commission from hearing or determining the appeal until the Court proceeding was determined. The Court said the answer to the preliminary question bore on whether that injunction should continue and whether there remained a live controversy before the Court.

For employers, the practical lesson is not simply about long service leave. It is about dispute framing. Enterprise agreement disputes often begin with one employee's complaint, but the way the issue is documented can shape the legal scope of any later arbitration. If the referral says the dispute concerns one employee's entitlement, that may limit the binding effect of the result even where the legal reasoning has broader implications.

That can work in different ways depending on your objective. If an employer wants to resist an enterprise-wide outcome from a single employee dispute, this case shows there may be a strong argument that the arbitral award is confined to the dispute actually referred. But if a business wants certainty across the workforce, it should not assume that a generally worded arbitral decision in one employee's matter will settle the issue for everyone. The safer course is to decide early whether the issue should be framed and processed as a broader dispute under the agreement, or whether court proceedings are needed for wider declaratory relief.

It is also a reminder to keep the internal and external paperwork aligned. The internal steps under the dispute resolution clause, the Form 10 application, any jurisdictional objections, agreed facts, written submissions and agreed questions for arbitration can all matter. If those documents point in different directions, the Court may return to the original referral and ask what dispute was actually before the Commission.

Finally, businesses operating in sectors with common enterprise agreement wording should think beyond the immediate dispute. If several employers are affected by the same clause, a joined proceeding may be a more effective way to obtain broader certainty than relying on the spillover effect of one arbitral award.

The key dates visible from the judgment are these. The enterprise agreement was approved on 6 December 2023. The email exchange involving Mr Ammon and the union occurred on 4 February 2025. The union filed its Form 10 application on 14 February 2025. The parties agreed to the proposed questions for arbitration in mid-March 2025, and the Commission directed those questions on 18 March 2025. The arbitral award was made on 9 June 2025. The Federal Court had stated the preliminary question on 9 September 2025, and Jackson J delivered judgment and orders on 20 February 2026.

The judgment available for this page is sufficient to explain the preliminary question, the joinder orders and the Court's core reasoning. However, because the published reasons available here are truncated before the end, this page does not go beyond the points clearly supported by the text.