Exhibit 5.3
MAYER
BROWN
ROWE
& MAW
Mayer, Brown, Rowe & Maw LLP
71 South Wacker Drive
Chicago, Illinois 60606-4637
Main Tel (312) 782-0600
Main Fax (312) 701-7711
www.mayerbrownrowe.com
January 31, 2007
TransCanada Corporation
450 - 1st Street S.W.
Calgary, Alberta, Canada, T2P 5H1
Ladies and Gentlemen:
We hereby consent to the references to this firm under the caption "Legal Matters" in the prospectus included as part of the registration statement on Form F-10 (Registration No. 333-140150) of TransCanada Corporation.
| Very truly yours, | ||
/s/ Mayer, Brown, Rowe & Maw LLP Mayer, Brown, Rowe & Maw LLP |
Berlin Brussels Charlotte Chicago Cologne Frankfurt Hong Kong Houston London Los Angeles New York Palo Alto Paris Washington, D.C.
Independent Mexico City Correspondent: Jauregui, Navarrete y Nader S.C.
Mayer, Brown, Rowe & Maw LLP operates in combination with our associated
English limited liability partnership in the offices listed above.
