2026-27 BMSB Rules for China Imports to Australia

Australia's 2026-27 brown marmorated stink bug season begins on 1 September. Importers shipping from China need to check the rules before booking, but they should not assume every China-origin container requires mandatory BMSB treatment.

The outcome depends on what the goods are, where they were manufactured or shipped from, the shipped-on-board date, routing and transhipment, cargo mode and—in some cases—the vessel's port history.

What changed for 2026-27

DAFF's seasonal measures list three operational changes:

• ethyl formate has been added as an onshore BMSB treatment option;
• the Rolled Goods Policy has been removed; and
• the Safeguarding Arrangements Scheme is no longer available.

The removal of those pathways matters to importers who used them in earlier seasons. Do not reuse last season's booking or clearance plan without checking the current options.

Which shipment date controls

The seasonal goods measures apply to applicable cargo shipped between 1 September 2026 and 30 April 2027 inclusive. DAFF uses the shipped-on-board date shown on the Ocean Bill of Lading. A gate-in date is not a substitute.

Before approving the sailing, obtain the proposed shipped-on-board date and allow for rollovers that could move a shipment into the seasonal period.

China is not treated like every target-risk country

China appears in DAFF's 2026-27 settings as an emerging-risk country and for heightened vessel surveillance. That does not mean ordinary China origin automatically creates the mandatory treatment rule that applies to target high-risk goods manufactured in or shipped from target-risk countries.

DAFF states that goods shipped from China during the season can be subject to random inspection. It also identifies extra emerging-risk chapters 39, 94 and 95 for random inspection settings.

The practical distinction is:

• goods rules: depend on classification, manufacture/shipment country, route, cargo mode and other live DAFF conditions;
• vessel surveillance: applies to relevant Ro-Ro vessel movements and inspections of the vessel; and
• random inspection: is not the same as mandatory offshore treatment for every shipment.

A five-step check before booking

1. Identify the exact goods and tariff chapter

Confirm the product, materials and proposed tariff classification. Machinery, vehicles, metal, wood, stone, ceramics, furniture and other risk categories can produce different BMSB outcomes.

Do not use the supplier's generic HS code as the only classification evidence. Ask the customs broker to review the Australian classification and the live DAFF target-goods list.

2. Confirm manufacture, shipment and transhipment countries

The supplier address does not prove where the goods were manufactured or which risk countries the cargo or vessel may pass through.

Ask for the country of manufacture, port of loading, planned transhipment ports and any possible routing alternatives. Recheck after a carrier changes the sailing.

3. Confirm cargo mode and container type

Hard six-sided containers, open tops, flat racks, modified containers and break bulk can face different treatment or on-arrival options. Some untreated break-bulk or open cargo cannot rely on an onshore solution.

Record the intended equipment type in the purchase and freight plan rather than waiting for the booking confirmation.

4. Check treatment and provider status where treatment is required

If the live decision path requires treatment, confirm whether it must occur offshore or can occur onshore for the actual cargo mode. Use a currently recognised treatment provider and ensure the certificate matches DAFF's methodology and consignment details.

Ethyl formate is an added option, not a universal replacement for other treatments and not proof that every cargo can be treated after arrival.

5. Keep the shipping documents consistent

The bill of lading date, origin/manufacture evidence, treatment certificate, invoice, packing list and container details need to describe the same shipment. A mismatch can trigger holds or prevent DAFF from accepting the treatment evidence.

Ro-Ro vessel surveillance is a separate rule

DAFF's heightened surveillance applies to relevant Ro-Ro vessels that berthed, loaded or transhipped in listed countries, including China, during the vessel surveillance period. The vessel may receive a seasonal pest inspection on arrival.

This is a rule about the vessel and should not be presented as automatic mandatory treatment for every good carried on it. Vehicle and machinery importers should nevertheless ask the carrier or agent how the vessel's route is being managed.

What to ask your broker or forwarder

Send the product classification, manufacture country, port and route, shipped-on-board date, equipment type and any treatment proposal. Ask for a written answer to:

1. Are the goods in a target high-risk or target-risk tariff category?
2. Does manufacture, shipment or transhipment involve a target-risk country?
3. Is China creating an emerging-risk random-inspection or vessel-surveillance setting for this movement?
4. Is treatment required, and if so, where and by whom can it be performed?
5. What happens if the vessel or routing changes after booking?

Bottom line

For China imports, the 2026-27 BMSB answer is not a blanket yes or no. It is a shipment decision built from goods, date, origin, route, cargo mode and vessel facts.

Run that check before the booking is fixed. The cost of changing equipment, routing or treatment before shipment is usually easier to manage than a non-compliant arrival.

For help coordinating supplier, freight and import requirements, contact Ocean Port Link.