WEBSITE DISCLOSURE REQUIRED BY SECTION 303A(11) OF THE NEW YORK STOCK EXCHANGE COMPANY MANUAL

Summary of significant ways corporate governance practices followed by TransCanada
Corporation differ from corporate governance practices required to be followed by U.S.
domestic issuers under the New York Stock Exchange rules

As a Canadian reporting issuer with securities listed on the Toronto Stock Exchange ("TSX"), TransCanada has in place a system of corporate governance practices which comply with the Canadian Securities Administrators ("CSA") Multilateral Instrument pertaining to audit committees and with the CSA’s National Policy pertaining to corporate governance guidelines, as well as the New York Stock Exchange Corporate Governance Rules ("NYSE Rules") applicable to foreign private issuers.

The Board of Directors of TransCanada has formally adopted and published a set of Corporate Governance Guidelines which affirm TransCanada’s commitment to maintaining a high standard of corporate governance. These guidelines are published on this website under the heading "Corporate Governance, Corporate Governance Guidelines". As well, disclosure relating to TransCanada’s corporate governance practices are published in its Management Proxy Circular under the heading "Corporate Governance" and in Schedule "A" thereto.

In the context of its listing on the New York Stock Exchange ("NYSE"), TransCanada is classified as a foreign private issuer and therefore only certain of the NYSE Rules are applicable to TransCanada. However, TransCanada benchmarks its policies and procedures against major North American companies, with a view to adopting best practices when appropriate to its circumstances. Some of TransCanada’s best practices are derived from the NYSE Rules and are in compliance with applicable rules adopted by the SEC to give effect to provisions of the Sarbanes-Oxley Act of 2002.

TransCanada’s corporate governance practices do not significantly differ from those required to be followed by U.S. domestic issuers under the NYSE’s listing standards.

Revised: February 27, 2006