The OEFSRs shall be peer reviewed.

The OEFSRs shall furthermore define the appropriate unit for intensity-based metrics, required for specific communication purposes.

The OEFSRs shall specify whether the OEF results shall be reported separately for each of the selected life cycle stages.

The OEFSRs shall furthermore define the appropriate unit for intensity-based metrics required for specific communication purposes.

The OEFSR shall address potential data gaps and provide detailed guidance for filling these gaps.

The PEFCR shall identify the most relevant EF impact categories for the sector.

OEFSRs shall be based on at a minimum a two-digit code division of NACE codes (default option).

The OEFSR shall further specify sources, quality and review requirements for the data used in an OEF study.

The OEFSR shall further specify how the Product Portfolio is defined, in particular with respect to how well and for how long.

For modelling processes/activities within the defined Organisational boundary (i.e. gate-to-gate stage), the OEFSR shall also specify

If a fixed time span is not appropriate or relevant for a certain sector (e.g. some consumable products), the OEFSR shall specify and justify why this is the case.

Where allocation by some other relationship is to be applied, the OEFSR shall specify the relationship and establish the relevant allocation factors.

The OEFSR shall specify and justify any exclusion of the default EF impact categories, especially related to aspects of comparability.

The PEFCRs shall specify whether the PEF results shall be reported separately for each of the selected life cycle stages.

For multi-functionality in EOL situations, the OEFSR shall specify how to calculate the different parts within the provided mandatory formula.