NOTICE DATE: December 16, 2014 NOTICE TYPE: W-A121614-01 Operations SHORT DESCRIPTION: Notification of Change of Generation Resource Designation for Martin Lake Unit 3 INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: December 30, 2014 LONG DESCRIPTION: On December 15, 2014, ERCOT received a Notification of Change of Generation Resource Designation (NCGRD) for the following Generation Resource with a proposed effective date of December 30, 2014: * Luminant Generation Company LLC, Martin Lake Unit 3 (MLSES_UNIT3) The NCGRD proposes that this Mothballed Generation Resource operating under a Seasonal Operation Period will change the start date of its Seasonal Operation Period from May 15, 2015, to December 30, 2014, for calendar year 2015 only. ADDITIONAL INFORMATION: Pursuant to Section 3.14.1.9 (6), ERCOT has posted the notification in the list titled "Notice of Change of Generation Resource Designation" on the Generation page<https://mis.ercot.com/pps/tibco/mis/Pages/Grid+Information/Generation> of the Market Information System (MIS) Secure Area. An ERCOT Digital Certificate is required to access the MIS. 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. sa