What the tier decides
The tier has nothing to do with headcount or turnover; it depends solely on which threshold the quantity of dangerous substances passes. A small warehouse can be upper tier and a large factory lower tier.
The difference in obligations
| Obligation | Lower tier | Upper tier |
|---|---|---|
| Notification | Yes | Yes |
| Major accident prevention policy | Yes | Yes |
| Safety management system | Yes | Yes |
| Information to the public | Yes | Yes — extended |
| Safety report | — | Yes |
| Internal emergency plan | — | Yes |
| Information for the external plan | — | Yes |
| Planned inspection | Yes | Yes — more frequent |
The regimes are not identical
The naming and detail of the obligations do not map one to one between Türkiye and the European Union: the Turkish side has items of its own, such as the major accident scenario document and the dangerous substance intervention card. Copying one country's list to the other produces either missing or wasted work.
The tier can change
Stock policy, a new product or a change in a substance's classification can change the tier. When it does, the obligation list changes with it — and that this requires a fresh notification is often missed.
How this stands in Optifora
Each of the 26 obligation records is tagged with its regime (Turkish / EU) and its tier (lower · upper · both); when the establishment's profile changes, the list regenerates itself.