Company: TCPA
Filing Date: 2025-10-06
Form Type: SUPPL
Source: 0001193125-25-231083
Chunk: 27

Company: TRANSCANADA PIPELINES LTD
Filing Date: 2025-10-06
Form: SUPPL
Chunk 27
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 the close of business on the date (whether or not such day is a business day) fifteen calendar days immediately preceding the relevant Interest Payment Date.

Interest on the Notes will be calculated on the basis of a 360-day year consisting of twelve 30-day months and, for any period shorter than three months, on the basis of the actual number of days elapsed per 30-day month. For the purposes of disclosure under the
Interest Act(Canada), and without affecting the interest payable on the Notes, whenever the interest rate on the Notes is to be calculated on the basis of a period of less than a calendar year, the yearly interest rate equivalent for such
interest rate will be the interest rate multiplied by the actual number of days in the relevant calendar year and divided by the number of days used in calculating the specified interest rate.

If an Interest Payment Date, redemption date or the Maturity Date falls on a day that is not a business day, the payment of interest,
principal or premium due on such day will be postponed to the next business day, and no further interest, principal or premium, as applicable, will accrue in respect of such postponement.

Listing and Trading

Wewill
applyto list the Notes on the NYSE. If approved for listing, trading on the NYSE is expected to commence within 30 days after the Notes are first issued.The Notes are expected to trade “flat”, meaning that purchasers will
not pay and sellers will not receive any accrued and unpaid interest on the Notes that is not included in the trading price.

Specified Denominations

The Notes will be issued only in minimum denominations of U.S.$25and integral multiples of U.S.$25in excess thereof.

S-17

Additional Notes We may from time to time, without notice to, or the consent of, the holders of the Notes, create and issue additional Notes under the Indenture, equal in rank to the Notes in all respects so that the new Notes may be consolidated and form a single series with the Notes and have the same terms as to status, redemption and otherwise as the Notes issued under this prospectus supplement. Deferral Right So long as no event of default has occurred and is continuing, we may elect, in our sole discretion, at any date other than an Interest Payment Date, to defer the interest payable on the Notes on one or more occasions for up to 10 consecutive years (a “ Deferral Period”). There is no limit on the number of Deferral Periods that may occur.