All Bulk Power System (BPS) owners, operators, and users are required to register with the North American Electric Reliability Corporation (NERC) and are subject to compliance with approved NERC Reliability Standards. The process for registration is described in Section 500 and Appendix 5A of the NERC Rules of Procedure.

NERC developed a Statement of Compliance Registry Criteria, detailed in Appendix 5B of the NERC Rules of Procedure, that delineates the selection criteria employed by NERC and the Regional Entities to determine fairly and consistently which organizations should be registered as owners, operators, or users of the bulk power system and therefore should be included on the NERC Compliance Registry (NCR). A full list of registered entities can be found in the NCR.

Registered entities in the Midwest Reliability Organization (MRO) Region can be found in MRO’s Compliance Registry, which is updated monthly.

Registration as a BPS owner, operator or user in the MRO Region is processed through NERC's Centralized Organization Registration ERO System (CORES) application. Prior to registration, users must register for an ERO Portal account to access the CORES application. Once you are logged into the ERO Portal, click on "New Entity Registration Request" and fill in the requested information. Submit questions regarding registration to The CORES and ERO Portal User Guides are available on the NERC website.

The NERC Rules of Procedure, Appendix 5A – Organization Registration and Certification Manual, requires all Balancing Authorities, Transmission Operators, and Reliability Coordinators to be certified to perform their respective functions and are subject to Certification reviews if there have been material changes that may affect their Real-time operations. The most common triggers for a review are the replacement of an existing SCADA/EMS, relocation of a control center or a change of footprint. For a complete list of changes subject to a review see section IV – Organization Certification Process of Appendix 5A. Any entity planning to start operating in one of the three above-mentioned functions, or any entity registered within MRO Region and planning on a change, are requested to complete the Certification Request form.