In accordance with Certificate Condition 6 and Order Condition 7, NGTL encloses Commitment Tracking Table No. 3 for the Project. The reporting period for this submission is April 3, 2017 to April 30, 2017.

NGTL encloses its Commitment Tracking Table No. 1. This submission is in response to both Section 52 Condition 6 and Section 58 Condition 7 located in Appendices II and III of the Report.

TransCanada Pipelines Ltd — Financial Statements — 2020

This report describes the Commitment Tracking Table No. 4 dated from September 2, 2015 to May 31, 2017 for the Towerbirch Expansion Project.

This report—produced since 2001—provides us with the opportunity to comprehensively and transparently report on our economic, social and environmental performance. We define corporate responsibility (CR) as our “commitment to operating in an economically, socially and environmentally sustainable manner while recognizing the interests of our stakeholders.”