NOTICE DATE: March 19, 2013 NOTICE TYPE: M-B031913-01 NPRR SHORT DESCRIPTION: Implementation details for NPRR521 INTENDED AUDIENCE: CRR Account Holders DAY AFFECTED: April 1, 2013 LONG DESCRIPTION: On April 1, 2013, Nodal Protocol Revision Request (NPRR) 521, Transitional CRR Auction Capacity Value for Initial CRR Long-Term Auction Sequence, shall become effective. NPRR521, which was approved by the ERCOT Board on March 19, 2013, increases the Congestion Revenue Right (CRR) Auction Capacity for the first six-month portion of the initial CRR Long-Term Auction Sequence from 60% to 70%. This change will only be effective for the initial CRR Long-Term Auction Sequence (CRRs for July - December 2013), in order to mitigate potential system and market issues during the transition. The key dates and activities for the initial auction sequence are below. * Long-Term Auction Sequence 1 (CRRs for July - December 2013) o Post Network Model - April 2, 2013 o Post Auction Notice and open Credit Window - April 10, 2013 o Credit Lock - April 29, 2013 o Bid submission open - April 30, 2013 o Bid submission close - May 2, 2013 o Results posted - May 16, 2013 Monthly auction activities have not been changed and will continue to run in parallel to the CRR Long-Term Auction Sequences. ADDITIONAL INFORMATION: NPRR521 and associated documents can be found on the ERCOT website, under Market Rules, at http://www.ercot.com/mktrules/issues/nprr/501-525/521/index. The 2013-2014 CRR Activity Calendar is located on the Market Information/Congestion Revenue Rights webpage at http://www.ercot.com/mktinfo/crr/, and on the Markets/CRR landing page on the Market Information System (MIS), under CRR Information, at https://mis.ercot.com/pps/tibco/mis/Pages/Market+Information/CRR. 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 the ERCOT CRR Team 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<http://lists.ercot.com/>. ka