1. A label communicates risk; it does not create factory control
“Contains” and “may contain” answer different questions. The first concerns an allergen used as an ingredient; the second concerns potential cross-contamination during production when applicable under the facts and the relevant rules.
Whatever the label says, the manufacturer still needs evidence that it knows the risk sources, controls the movement of ingredients, people, equipment, work in progress and packaging, and makes decisions from the actual product and lot.
2. Start with the formula and supplier data, not the snack name
A snack led by durian may also involve milk, soy, tree nuts, gluten-containing cereals or other materials through the recipe, processing aids, compound ingredients or a supplier's line. The front-of-pack name is not enough.
The evidence file should connect the current master-formula version with specifications, supplier allergen information, receiving controls and the real process. This article does not classify or identify allergens for a Siam Diamond product without those records.
3. An allergen map makes a shared line visible
Codex calls for risk assessment based on actual operations. A map should cover receiving, storage, weighing, mixing, processing, work-in-progress holds, packing, shared utensils, dust or spills, people flows and label storage.
The purpose is not merely to list allergens. It is to locate where cross-contact could happen, who controls each point, by what method and what evidence is required before start-up or lot release.
4. Segregation, sequencing and rework must work together
Where full physical separation is not feasible, time separation, sequencing from simpler to more complex allergen profiles, and controls for containers, utensils, work in progress, rework and residual material can form part of a risk-based programme.
A schedule alone is insufficient if ingredient substitutions, rush jobs, rework or label changes bypass change control. The record must reflect what actually happened on that shift and lot.
5. “Cleaned” needs a method and evidence
Codex emphasizes effective cleaning that reaches accumulation points and is verified as appropriate to risk. Saying the line was cleaned—or seeing no residue—does not by itself show that the control was suitable.
The method, criteria, tools, sampling points, frequency, responsibilities, results, deviations and response should connect. This article sets no threshold or test method because those choices depend on the product, equipment, risk and applicable requirements.
6. A wrong label version can break the whole system
Codex identifies outdated labels, misprints, wrong packaging and translation errors among causes of undeclared allergens. Control should therefore cover artwork approval, issue, line clearance, reconciliation and disposal of obsolete stock.
Before release, formula code, packaging code, language, destination and the material actually used on line should agree. A historic artwork approval is not evidence for the current lot.
7. Seven layers of an Allergen Control Evidence File
Each layer should remain distinct yet connect through the same SKU, formula, line, date, shift and lot identifiers.
- Product definition: formula, processing aids, intended use and destination market
- Supply-chain information: specifications, allergen declarations, supplier approval and change notification
- Map and risk assessment: cross-contact points and flows of people, ingredients, equipment and dust
- Production controls: separation in space or time, sequencing, dedicated tools, rework, carry-over and deviations
- Cleaning: method, suitability evidence, verification, actual results and response
- Label control: artwork, version, language, issue, line clearance and reconciliation
- Lot release and lifecycle: shift records, approval, training, complaints, recall readiness and change control
8. Thai rules, export context and the limit of this conclusion
Notification No. 450 appeared in Thailand's Government Gazette on 18 July 2024; the Thai FDA page was published on 19 July 2024 and links a correction published on 14 July 2025. Codex CXC 80-2020 identifies 2026 as its latest amendment year.
Allergen lists, wording, language and conditions for precautionary labelling can differ by destination. Codex itself notes that export-market requirements may vary, so the current formula, process, law and importer information must be checked before applying the framework to a real SKU.
