NOTICE DATE: May 22, 2015 NOTICE TYPE: M-B052215-01 NPRR SHORT DESCRIPTION: Implementation details of NPRR543 INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: June 22- 26, 2015 LONG DESCRIPTION: From June 22 to June 26, 2015, ERCOT will implement Nodal Protocol Revision Request (NPRR) 543, Message for Confirmed E-Tags, which was approved by the ERCOT Board on November 19, 2013. This NPRR provides for notification to the Market Information System (MIS) Certified Area when a confirmed Electronic Tag (e-Tag) is downloaded, cancelled, or curtailed by ERCOT's systems. ADDITIONAL INFORMATION: Pursuant to Nodal Protocol Section 21.6, Nodal Protocol Revision Implementation, ERCOT is required to provide notice as soon as practicable, but no later than ten days prior to implementation. NPRR543<http://www.ercot.com/mktrules/issues/NPRR543> and associated documents can be found on the ERCOT website. CONTACT: If you have any questions, please contact 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]<mailto:[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. mm