Merger-control timing is now an execution variable

Observed facts: notification can gate completion

Australia's mandatory merger-control regime applies to acquisitions that meet the prescribed notification thresholds or fall within specified classes. The Australian Competition and Consumer Commission states that an acquisition must not proceed unless it has been notified and the ACCC has permitted it, where the notification requirements apply [1]. The legislation provides the statutory framework, while the thresholds determination supplies the operative monetary and transaction tests [4][5]. This makes threshold analysis a completion issue rather than only a competition-law housekeeping item.

The threshold exercise is also not confined to the target's latest headline revenue. ACCC guidance requires parties to consider the connected entities of the acquirer and target, and in some cases acquisitions made during the previous three years [1]. That creates an evidence dependency at the perimeter of the deal: group structure, Australian turnover, prior acquisitions, asset values and transaction classification may need to be established before the parties can confidently determine whether notification is mandatory. A late threshold conclusion can therefore change the regulatory path after commercial terms have already hardened.

Observed facts: the statutory clock is not the whole timetable

The ACCC's published assessment periods are measured from an effective notification. Phase 1 is generally 15 business days, Phase 2 is generally 50 business days, and a public-benefit application is generally 50 business days [3]. Those periods are important, but they do not represent the complete elapsed time from a board decision to completion. They sit after threshold work, preparation of the notification, payment of the applicable fee, and any pre-notification engagement needed to make the filing ready for review [2][3].

The ACCC encourages pre-notification engagement and asks parties to allow at least 20 business days before their intended notification date for a standard acquisition, with more time for complex matters [2]. It may consider a draft form, identify missing material and indicate whether the parties should provide further information before lodging. This is a practical scheduling fact: a transaction model that budgets only the formal assessment period omits a regulator-facing preparation phase that can be comparable in length to Phase 1 itself.

Observed facts: evidence quality affects when review can start

A notification becomes effective only when it is properly made, on time and accompanied by the applicable fee [3][4]. ACCC guidance says the agency will check whether the form is complete and may advise that a notification has not been properly made if required information or documents are missing [2]. The consequence is not merely editorial rework. Until the notification is effective, the formal assessment timetable does not provide the expected execution certainty.

The notification process therefore depends on evidence that may sit across legal, finance, strategy and operating teams. Relevant material can include ownership and control information, transaction documents, market descriptions, customer and competitor evidence, internal analysis, prior acquisitions and data supporting the parties' market position [2]. The regime does not make every acquisition contentious, but it does make document retrieval and factual consistency part of readiness. Assertions that cannot be reconciled across the form, board materials and underlying data can create avoidable questions even where the substantive competition position may ultimately be manageable.

Oakhampton inference: build a regulatory critical path

Oakhampton's inference is that merger control should be managed as an integrated transaction workstream from the first credible deal timetable, not as a filing task opened immediately before signing. The observed rules support front-loading four linked decisions: whether the regime is engaged, what evidence is required, when regulator engagement should begin, and how the sale agreement allocates timing risk. This is an execution conclusion drawn from the official process, not a prediction about the ACCC's decision in any individual matter.

Timing also has an economic dimension. Current transaction commentary notes that delayed completion can shift value between buyer and seller and has increased attention on ticking fees and other mechanisms that compensate for the passage of time [6]. The appropriate mechanism remains deal-specific, but the broader point is transferable: regulatory duration can affect funding, working capital, leakage, employee retention, integration planning and the point at which commercial control changes. A regulatory assumption should therefore connect to the financial model rather than sit only in a conditions-precedent schedule.

• Complete an initial threshold and aggregation analysis before treating the signing or completion date as firm.
• Create a source-controlled evidence list covering group structure, turnover, prior acquisitions, transaction documents and market support.
• Schedule pre-notification work separately from the formal ACCC assessment period and identify internal owners for rapid factual responses.
• Align long-stop dates, funding availability, conduct covenants and any delay-pricing mechanism with the regulatory base case and downside case.

Remaining uncertainty

The actual path remains matter-specific. Threshold application can depend on transaction structure and connected-entity data; the ACCC may require more or less pre-notification engagement; and a matter can move beyond Phase 1 if competition concerns require deeper review [1][2][3]. Published process periods do not guarantee a particular result, and this article does not determine whether any proposed acquisition is notifiable or likely to receive clearance.

The bounded conclusion is operational. Under a mandatory and suspensory regime, notification timing, evidence completeness and transaction documentation are connected variables. Parties can reduce avoidable execution risk by resolving the notification perimeter early, preserving a reliable evidence trail, separating pre-notification preparation from statutory review, and carrying regulatory timing through the commercial model. Legal interpretation and filing strategy still require transaction-specific advice, particularly where thresholds, control, aggregation or market definition are uncertain.