Fifth Amending Agreement to the Amended and Restated Credit Agreement, dated as of September 28, 2023, among AltaLink Investments, L.P., as borrower, AltaLink Investment Management Ltd., as general partner, Royal Bank of Canada, as administrative agent, and Lenders

FIFTH AMENDING AGREEMENT TO THE AMENDED AND RESTATED CREDIT AGREEMENT, dated as of September 28, 2023, among AltaLink Investment Management Ltd., in its capacity as general partner of AltaLink Investments, L.P., as Borrower, AltaLink Investment Management Ltd., as General Partner, Royal Bank of Canada, as Agent of the Lenders (the “Agent”), and the Lenders party hereto.

WHEREAS AltaLink Investment Management Ltd., in its capacity as general partner of AltaLink Investments, L.P., as Borrower, Royal Bank of Canada, as Agent of the Lenders, and the Lenders are parties to an Amended and Restated Credit Agreement made as of January 24, 2020, as amended by a first amending agreement dated as of April 27, 2020, a second amending agreement dated as of May 17, 2021, a third amending agreement dated as of December 15, 2021 and a fourth amending agreement dated as of September 5, 2023 (collectively, the “Original Credit Agreement”);

AND WHEREAS the Borrower, the General Partner, the Lenders and the Agent have agreed to amend certain provisions of the Original Credit Agreement in the manner and on the terms and conditions provided for herein.

NOW THEREFORE for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows:

All capitalized terms not otherwise defined herein shall have the meanings ascribed thereto in the Original Credit Agreement.

(a)The definition of “Applicable Margin” in Section 1.1 of the Original Credit Agreement is deleted in its entirety and replaced with the following:

“Applicable Margin” means the applicable fee or margin amount set out in the following grid for the rating which corresponds to the senior unsecured credit rating received from S&P or DBRS for the Borrower and which is determined below:

Provided that if at any time neither S&P nor DBRS maintains a senior unsecured credit rating for the Borrower then “Applicable Margin” shall thereafter mean the applicable fee or margin amount set out in the following grid for the rating which corresponds to the issuer credit rating received from S&P or DBRS for the Borrower and which is determined below.

For purposes of this Agreement, if at any time the ratings assigned by the Rating Agencies fall within different rating categories in accordance with the above tables, (a) in the case where the lowest senior unsecured credit rating or issuer credit rating, as applicable, is BBB- or higher, the Applicable Margin will be the higher of the ratings and (b) in the case where the lowest senior unsecured credit rating or issuer credit rating, as applicable, is lower than BBB-, the Applicable Margin will be based on the average of the ratings.

Any increase or decrease in the Applicable Margin (other than with respect to Bankers’ Acceptances) resulting from a change in the rating assigned by one or more Rating Agency shall be calculated with reference to the new Applicable Margin and fee effective on and after the date on which such rating change is published, notwithstanding that any affected Advance may have been made or issued prior to such date. Any increase or decrease in the applicable Banker’s Acceptance Fee shall apply to all Bankers’ Acceptances drawn by the Borrower or on rollover or conversion pursuant to Section 2.8(f), as of the date of such drawing, rollover or conversion, as the case may be.

This Fifth Amending Agreement shall become effective when the Agent shall have received an executed copy of this Fifth Amending Agreement from each of the Agent, the Lenders, the Borrower and the General Partner.

The Borrower and General Partner each hereby represents and warrants to the Agent and the Lenders that after giving effect to this Fifth Amending Agreement, (i) each of the representations and warranties of the Borrower and the General Partner, as the case may be, contained in the Original Credit Agreement and each of the other Loan Documents is true and correct on, and as of, the date hereof as if made on such date (except to the extent that such representation or warranty expressly relates to an earlier date and except for changes therein expressly permitted or expressly contemplated by the Original Credit Agreement), and (ii) no event has occurred and is continuing which constitutes or would constitute a Default or an Event of Default.

Except as expressly set forth herein, the Original Credit Agreement and all Loan Documents shall be unmodified and shall continue to be in full force and effect in accordance with their terms.

Time is of the essence in the performance of the parties’ respective obligations in this Fifth Amending Agreement.

This Fifth Amending Agreement is a contract made under, and shall be governed by and construed in accordance with, the laws of the Province of Alberta and the federal laws of Canada applicable therein.

This Fifth Amending Agreement shall enure to the benefit of, and be binding upon, the parties hereto and their respective successors and any assigns, transferees and endorsees of the Agent or any Lender. Nothing in this Fifth Amending Agreement, express or implied, shall give to any Person, other than the parties hereto and their successors hereunder, any benefit or any legal or equitable right, remedy or claim under the Original Credit Agreement, as amended by this Fifth Amending Agreement.

This Fifth Amending Agreement may be executed by the parties hereto in counterparts and may be delivered by facsimile or other electronic means (including via electronic mail in portable document format) and all such counterparts shall together constitute one and the same agreement.

The parties hereto have duly executed this Fifth Amending Agreement as of the date set forth on the first page of this Agreement.