***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. ***** Resending with updated implementation date. NOTICE DATE: January 26, 2018 NOTICE TYPE: M-B012618-01 NPRR SHORT DESCRIPTION: Implementation Details of NPRR659 INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: February 8, 2018 LONG DESCRIPTION: On February 8, 2018, Nodal Protocol Revision Request (NPRR) 659, Discontinue RMR Cost Data Deviation Requests/Responses Report, will be implemented. This NPRR proposes the discontinuation of the posting requirement for Reliability Must Run Cost Data Deviation Requests/Responses, ERCOT Market Information List (EMIL) ID, NP3-558-M (Report ID 11468). 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. NPRR659<http://www.ercot.com/mktrules/issues/NPRR659> 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 a public 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. sa