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Biofouling Contingencies: Managing DAFF's 30-Day Cleaning Deadlines

Published 10 August 2026

Navigating Contingency Biofouling Requirements in 2026

As of August 2026, the Australian biofouling reporting regime has matured, but it remains one of the most stringent biosecurity hurdles for commercial vessels calling at ports like Brisbane. The Department of Agriculture, Fisheries and Forestry (DAFF) enforces these requirements under the Biosecurity Act 2015. Many operators still confuse this regime with the port state control functions administered by the Australian Maritime Safety Authority (AMSA). It is crucial to remember that AMSA handles anti-fouling systems (AFS) certification and safety inspections, while DAFF holds the line on invasive marine pests.

The Three Pillars of DAFF Compliance

When you submit your Maritime Arrivals Reporting System (MARS) pre-arrival report, you must declare how the vessel has proactively managed biofouling. DAFF accepts exactly three proactive management practices:

1. Operating under a Biofouling Management Plan and Record Book consistent with the Australian Biofouling Management Requirements (ABFMR).
2. Cleaning all biofouling from the hull and niche areas within 30 days before arrival in Australian territorial seas.
3. Implementing an alternative management practice pre-approved by DAFF, which requires an application at least 30 days before arrival.

Importantly, relying on a compliant antifouling coating alone is not an accepted practice. The baseline expectation is that your vessel operates under a compliant plan (Method 1). The ABFMR Version 4 took effect on 30 April 2026, setting strict minimum standards. But what happens when your plan falls short, perhaps due to a missed drydock or severe coating degradation? You are forced into contingency planning using Method 2 or Method 3.

The 30-Day Cleaning Contingency

If your management plan is non-compliant, DAFF expects you to clean the entire hull and all niche areas within 30 days prior to arrival. This is a massive logistical challenge. Niche areas (such as sea chests, bow thruster tunnels, and bilge keels) are notorious for accumulating marine growth and are difficult to clean thoroughly in the water.

The maritime industry is rapidly adapting to support this stringent requirement. Classification societies are formalizing the approval of vendors who perform these critical tasks. For instance, Lloyd's Register recently outlined new categories of service suppliers specifically for underwater biofouling inspections and hull cleaning activities. Using class-approved vendors ensures that the in-water cleaning report meets the minimum content requirements set out in Appendix B of the ABFMR Version 4.

Alternative Management Practices

If cleaning within 30 days is impossible, operators must rely on Method 3: an alternative management practice. This is not a quick fix. You must submit your proposal to DAFF at least 30 days before your arrival. DAFF will evaluate the proposed measures to determine if they adequately mitigate the biosecurity risk.

This process requires robust evidence. You will need recent underwater inspection reports, detailed operational histories, and a clear mitigation strategy. Leveraging a tool like the biofouling copilot in Berthfile can help operators compile the necessary historical data and documentation efficiently to support these complex DAFF applications.

Alignment with IMO 2023 Guidelines

While DAFF's requirements are mandatory for Australian arrivals, they are heavily informed by international standards. The current benchmark is the 2023 IMO guidelines, adopted in July 2023. These voluntary guidelines, formally adopted as the MEPC.378(80) resolution, supersede the older 2011 guidelines. They provide a comprehensive framework for managing marine growth and minimizing the transfer of invasive species.

As noted on the official IMO Biofouling web page, the updated guidelines represent a globally consistent approach. Although the IMO guidelines themselves are voluntary, aligning your contingency procedures and record books with MEPC.378(80) is the most reliable way to demonstrate best practices to DAFF inspectors during a biosecurity audit in Brisbane or any other Australian port.

Practical Takeaways for Operators and Agents

Preparing for an Australian port call requires vigilance. If your primary management plan is compromised, follow these steps:

• Assess the Timeline: Determine immediately if you need to execute a 30-day pre-arrival clean or apply for an alternative method. Do not wait until the MARS report is due.
• Vet Your Suppliers: If opting for in-water cleaning, ensure your service supplier is approved by a recognized classification society for biofouling inspections and cleaning. Their report must explicitly cover all niche areas.
• Prepare Robust Documentation: For alternative management applications, gather all recent inspection reports and operational logs. Submitting an incomplete application to DAFF will result in severe delays.
• Review PSC Risks: While managing DAFF biosecurity, do not neglect AMSA port state control readiness. Use the free PSC risk check in Berthfile to ensure your safety management systems and AFS certificates are in order before arrival.

Biofouling compliance in 2026 demands proactive management. By understanding the strict parameters of DAFF's contingency options, operators can avoid costly delays and protect the marine environment.

Disclaimer: This article provides general information only and does not constitute legal or regulatory advice. Always refer to the latest DAFF guidelines and classification society rules for specific compliance requirements.