The WEM Procedure - Portfolio Assessment sets out the methodology and processes by which the Economic Regulation Authority makes a Portfolio Assessment in accordance with the ESM Rules’ clause 2.16D.15.
Prior to May 2026, this WEM Procedure was known as 'WEM Procedure: Portfolio Determination'.
Requesting guidance in relation to the Offer Construction Guideline
Market Participants that have been notified that they are a Material Portfolio or Material Constrained Portfolio (ESM Rules’ clauses 2.16C.1(c)(ii) and 2.16C.2(d)) may request guidance from the ERA in relation to the Offer Construction Guideline (ESM Rules’ clause 2.16D.6).
In accordance with the WEM Procedure and the ESM Rules’ clause 2.16D.6, for the ERA to consider providing guidance, a request must:
- be in writing, using the online form linked below.
- identify the matters in the Offer Construction Guideline on which the Market Participant is seeking guidance.
- specify the Market Participant's reasons for seeking guidance.
- where relevant, provide supporting materials that illustrate or evidence the matters raised in the request.
The ERA is only required to consider requests for guidance on the Offer Construction Guideline that comply with ESM Rules’ clause 2.16D.5.
Procedure Change EEPC_2024_03
The November 2024 update refined wording in some sections of the Monitoring Protocol and clarified the risk assessment processes referred to in section 2.1, 4.5 and Appendix 1.