- Normative
List of changes in version 4.0 compared to version 3.1
The differences between version 3.1 and 4.0
The differences between version 3.1 and 4.0
List of CO2 reduction measures companies take.
Helps organisations assess whether OIE are relevant to them.
This document is normative as of 17 February 2025.
IISD Report (2025).
For independent experts conducting dialogues with certificate holders.
An organisation can add an independent expert to the pool.
For the transition period from Handbook 3.1 to Handbook 4.0.
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