NOTICE DATE:  April 23, 2012

NOTICE TYPE:  W-B022812-02 Operations

SHORT DESCRIPTION:  Registration in NAESB Web Registry

INTENDED AUDIENCE:  QSEs

DAY AFFECTED:  May 14, 2012

LONG DESCRIPTION:  The North American Electric Reliability Corporation (NERC) Transmission System Information Network (TSIN) Registry, currently used by Qualified Scheduling Entities (QSEs) to schedule flows over DC ties in ERCOT, is going to be replaced by the North American Energy Standards Board (NAESB) Open Access Technology International, Inc. (OATI) Web Registry. This project is being sponsored and transitioned from NERC to OATI by the NAESB.

The registration phase began on March 19, 2012, and ERCOT has registered itself as a Transmission Service Provider (TSP), Balancing Authority (BA) and Reliability Coordinator (RC) in the new OATI Web Registry. The registration period ends on May 14, 2012. The tentative date of the first publication of OATI Web Registry is May 14, 2012.

ACTION REQUIRED:  QSEs who schedule flows over DC ties in ERCOT are required to register with the new registry in order to continue scheduling flows over DC ties once this transition is complete.

ADDITIONAL INFORMATION:  Documents from the NAESB training webinar can be found at http://www.naesb.org/weq/weq_eir.asp.

CONTACT:  If you have any questions, please contact [log in to unmask] or the OATI Helpdesk at (763) 201-2020. You can also contact [log in to unmask]. For any ERCOT related questions, you may call your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

dh