March 3, 2015 Dear Market Participants and Other Interested Parties RE: Notice of Alberta Reliability Standard Effective Date: a) Adoption of New Alberta Reliability Standard BAL-004-AB-0, Time Error Correction (“BAL004-AB-0”); b) Retirement of Existing Alberta Reliability Standard BAL-004-AB-1, Time Error Correction (“BAL-004-AB-1”); and c) Amendments to Existing Alberta Reliability Standard BAL-005-AB1-0.2b, Automatic Generation Control (“BAL-005-AB1-0.2b”). Further to the Notice of Application posted by the Alberta Utilities Commission (“AUC”) on February 3, 2015, please see the following table for a summary of the filing and effective dates for the adoption of new BAL004-AB-0 and amended BAL-005-AB1-0.2b, and the retirement of BAL-004-AB-1. Previously Existing Alberta Reliability Standard Changed/New/Removed Standard AUC Application No. Date Filed with AUC AUC Notice of Application Date AUC Decision No. Effective Date BAL-004-AB-1 BAL-004-AB-0 20130-A001 February 2, 2015 February 3, 2015 20130-D012015 July 1, 2015 None BAL-004-AB-1 20130-A001 February 2, 2015 February 3, 2015 20130-D012015 July 1, 2015 BAL-005-AB0.2b BAL-005-AB1-0.2b 20130-A001 February 2, 2015 February 3, 2015 20130-D012015 July 1, 2015 In accordance with section 19 of the Transmission Regulation, the objection period has now passed, and on February 23, 2015, the AUC approved the adoption, retirement and amendment of these reliability standards. This reliability standards will become effective on July 1, 2015. For more information on Alberta reliability standards, please view Current Standards. Alternatively, please visit the AESO website at www.aeso.ca and follow the path: Rules & Standards > Alberta Reliability Standards > Current Standards. If you have any questions, please contact the undersigned. Sincerely, “Original Signed By” Kerry Snelson Regulatory Specialist Ph: 403-539-2470 E-mail: [email protected] Page 1