Mayer Brown LLP | |
| Main Tel +1 312 782 0600 |
December 23, 2019 | Main Fax +1 312 701 7711 |
| www.mayerbrown.com |
TransCanada PipeLines Limited
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. 333-235546) of TransCanada PipeLines Limited.
| Very truly yours, |
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| /s/ Mayer Brown LLP |
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| Mayer Brown LLP |
Mayer Brown is a global services provider comprising an association of legal practices that are separate entities including
Mayer Brown LLP (Illinois, USA), Mayer Brown International LLP (England), Mayer Brown (a Hong Kong partnership)
and Tauil & Chequer Advogados (a Brazilian partnership).