Document:

Exhibit 4.1

 

ENBRIDGE INC.

 

OFFICERS’ CERTIFICATE

PURSUANT TO SECTIONS 102, 201, AND 301 OF THE INDENTURE

 

We,
Maximilian G. Chan, Vice President, Treasury & Enterprise Risk, and Karen K.L. Uehara, Vice President & Corporate
Secretary, of Enbridge Inc., a corporation duly incorporated under the Companies Act of the Northwest Territories and continued and existing
under the Canada Business Corporations Act (the “Company”), in connection with the issuance by the Company on the
date hereof of (i) US$1,000,000,000 aggregate principal amount of the Company’s 2.500% Sustainability-Linked Senior Notes
due 2033 (the “Sustainability-Linked Senior Notes”) and (ii) US$500,000,000 aggregate principal amount of the Company’s 3.400%
Senior Notes due 2051 (the “Senior Notes” and, collectively with the Sustainability-Linked Senior Notes, the “Notes”),
each hereby certify pursuant to Sections 102, 201 and 301 of the Indenture, dated as of February 25, 2005, between the Company and
Deutsche Bank Trust Company Americas, as Trustee (the “Trustee”), as amended and supplemented by the First Supplemental Indenture,
dated as of March 1, 2012, between the Company and the Trustee, the Sixth Supplemental Indenture, dated as of May 13, 2019,
among the Trustee, the Company, Spectra Energy Partners, LP, a Delaware limited partnership (“SEP”), and Enbridge Energy
Partners, L.P., a Delaware limited partnership (“EEP” and, together with SEP, the “Guarantors”) and the Eighth
Supplemental Indenture, dated as of June 28, 2021, among the Trustee, the Company and the Guarantors (the indenture as amended and
supplemented, the “Indenture”), that:

 

		1.	The undersigned has read all of the conditions (including all definitions
                                            relating thereto) set forth in the Indenture for the authorization, issuance, authentication
                                            and delivery of the Notes.

 

		2.	The undersigned has examined the documents submitted by the Company
                                            to the Trustee relating to the Notes and certain other Company documents and records, including
                                            the Resolutions of the Board of Directors of the Company (the “Board”) referred
                                            to below and the actions of the Vice President, Treasury & Enterprise Risk and the
                                            Vice President & Corporate Secretary of the Company referred to below.

 

		3.	The undersigned has made such examination or investigation as is
                                            necessary to enable him or her, as the case may be, to express the informed opinion set forth
                                            in Paragraph 4 of this Certificate.

 

		4.	In the opinion of the undersigned, the conditions of the applicable
                                            provisions of the Indenture have been complied with in connection with the issuance of the
                                            Notes.

 

     

     

    

 

		5.	On
                                            June 24, 2021, in accordance with the Resolutions approved by the Board of Directors
                                            of the Company at meetings of the Board held on February 12 and 13, 2019 and December 1,
                                            2020, certain of the Authorized Officers (as defined in the Resolutions), following discussions
                                            by telephone among the officers of the Company and representatives of the Underwriters (as
                                            defined below) with respect to the terms to be established in respect of the issue and sale
                                            of the Notes to the several underwriters named in Schedule II (the “Underwriters”)
                                            to the Underwriting Agreement, dated as of June 24, 2021, among the Company and each
                                            of the Guarantors and Credit Suisse Securities (USA) LLC, BofA Securities, Inc., Citigroup
                                            Global Markets Inc., J.P. Morgan Securities LLC and SMBC Nikko Securities America, Inc.
                                            as representatives of the Underwriters, and the resale by the Underwriters of the
                                            Notes to the public, agreed upon and set the terms concerning the issue of the Notes, in
                                            accordance with Section 301 of the Indenture. The terms of the Notes, form of the Sustainability-Linked
                                            Notes and form of the Senior Notes are attached hereto as Exhibits A, B and C, respectively.

 

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blank]

 

    -2-

     

    

 

IN WITNESS WHEREOF, each of the undersigned has
executed this Certificate on behalf of the Company as of this 28th day of June, 2021.

 

	 	Enbridge Inc.
	 	 
	 	 
	 	By:	/s/ Maximilian G. Chan
	 	 	Name:	Maximilian G. Chan
	 	 	Title:	Vice President, Treasury & Enterprise Risk
	 	 	 
	 	 	 
	 	By:	/s/ Karen K.L. Uehara
	 	 	Name:	Karen K.L. Uehara
	 	 	Title:	Vice President & Corporate Secretary

 

[Signature Page to Officer’s Certificate
Pursuant to Indenture]

 

    

     

    

 

Exhibit A

 

    A-1

     

    

 

Terms of US$1,000,000,000 2.500% Sustainability-Linked
Senior Notes due 2033

 

Capitalized terms used but not defined herein
shall have the meanings given to such terms in the Indenture.

 

		(1)	Title
                                            of Securities: “2.500% Sustainability-Linked Senior Notes due 2033” (the
                                            “Sustainability-Linked Senior Notes”).

 

		(2)	Total
                                            Aggregate Principal Amount of Sustainability-Linked Senior Notes to be initially issued and
                                            sold to the Underwriters for Resale to the Public: US$1,000,000,000. The Company may,
                                            at any time, and from time to time, issue additional Sustainability-Linked Senior Notes under
                                            the Indenture in unlimited amounts having the same terms as the Sustainability-Linked Senior
                                            Notes, and such additional Sustainability-Linked Senior Notes will, together with the then
                                            existing Sustainability-Linked Senior Notes and any notes which may be issued in exchange
                                            or substitution therefor, constitute a single series of notes under the Indenture.

 

		(3)	Guarantees:
                                            In accordance with Section 1401 of the Indenture, the Sustainability-Linked Senior Notes
                                            are guaranteed by both Guarantors.

 

		(4)	Maturity
                                            Date: August 1, 2033 (the “Sustainability-Linked Maturity Date”).

 

		(5)	Interest:
                                            The Sustainability-Linked Senior Notes will bear interest at the rate of 2.500% per annum
                                            (the “Initial Sustainability-Linked Interest Rate”), subject to increase as described
                                            in the immediately following provisions of this Section (5), accruing from June 28,
                                            2021, or from the most recent Interest Payment Date to which interest has been paid or duly
                                            provided for.

 

From and including August 1, 2026 (or if such day is
not a Business Day, the next succeeding Business Day) (the “First Step Up Date”), the interest rate payable on the Sustainability-Linked
Senior Notes shall be increased by 5 basis points to 2.550% per annum (the “First Step Up Interest Rate”), unless the Company
has notified the Trustee in writing on or before the date that is 15 days prior to August 1, 2026 (the “First Notification
Due Date”) in the form of an Officers’ Certificate (the “Satisfaction Notification”) that (i) the Company
has determined that the Company has satisfied the Percentage of Racial & Ethnic Diversity Performance Target (as defined herein)
and (ii) the Company has received a related assurance letter from the External Verifier (as defined herein) (such letter, an “Assurance
Letter”). From and including August 1, 2031 (or if such day is not a Business Day, the next succeeding Business Day)
(the “Second Step Up Date”), the interest rate payable on the Sustainability-Linked Senior Notes shall be increased by 50
basis points to (x) 3.050% per annum (the “Fully Adjusted Second Step Up Interest Rate”) if the First Step Up Interest
Rate was in effect immediately prior to the Second Step Up Date or (y) 3.000% per annum (the “Partially Adjusted Second Step
Up Interest Rate”) if the Initial Sustainability-Linked Interest Rate was in effect immediately prior to the Second Step Up Date,
unless the Company has provided a Satisfaction Notification to the Trustee in writing on or before the date that is 15 days prior to
August 1, 2031 (the “Second Notification Due Date” and, with the First Notification Due Date, each a “Notification
Due Date”) that (i) the Company has determined that the Company has satisfied the GHG Emissions Performance Target (as defined
herein) and (ii) the Company has received a related Assurance Letter from the External Verifier. For the avoidance of doubt, if
the Company has provided the Trustee with the applicable Satisfaction Notification on or prior to each Notification Due Date, then the
interest rate payable on the Sustainability-Linked Senior Notes shall not increase from the Initial Sustainability-Linked Interest Rate
pursuant to this paragraph.

 

    A-2

     

    

 

The interest rate applicable to the Sustainability-Linked
Senior Notes will only be adjusted on the First Step Up Date and the Second Step Up Date based upon the satisfaction or non-satisfaction
of a SPT on or prior to the applicable Notification Due Date. Any satisfaction of a SPT subsequent to the applicable Notification Due
Date or cessation of satisfaction, or any failure to satisfy a SPT subsequent to the applicable Notification Due Date will not result
in an adjustment to the interest rate payable on the Sustainability-Linked Senior Notes.

 

The Trustee shall not be obliged to monitor, inquire or verify
as to whether a SPT has been satisfied. With respect to the rate at which the Sustainability-Linked Senior Notes will bear interest,
the Trustee shall be fully protected in conclusively relying upon the Satisfaction Notification delivered to the Trustee by the Company
on or prior to the applicable Notification Due Date, which sets out, among other things, the interest rate for the Sustainability-Linked
Senior Notes.

 

For purposes of this Section 5 and, as applicable, Section 9,
the following defined terms apply:

 

“Absolute GHG Emissions” means, for any period,
the total aggregate amount of Scope 1 Emissions and Scope 2 Emissions for such period, which, for greater certainty, will not include
the purchase of carbon offsets.

 

“Environmental SPT Observation Date” means December 31,
2030.

 

“External Verifier” means one or more qualified
independent public accountants or environmental consultants (solely with respect to verifying the GHG Intensity Performance Target) of
recognized national standing designated from time to time by the Company to provide limited assurance on the Company’s GHG Intensity
and/or Percentage of Racial & Ethnic Diversity.

 

“GHG Intensity” means the Absolute GHG Emissions
per petajoule of energy delivered (throughput) by assets under the operational control of the Company and its Subsidiaries in a fiscal
year, as calculated at the end of such fiscal year in accordance with the Company’s internal throughput calculation methodology.
The Company may elect, without the consent of the Noteholders, to switch from the operational control method for calculating GHG Intensity
to an equity share method and make, in good faith, adjustments to the 2018 baseline GHG Intensity and the Company’s internal methodology
for calculating energy throughput and Absolute GHG Emissions in order to account for such switch.

 

    A-3

     

    

 

“GHG Intensity Performance Reference Period” means
the fiscal year of the Company ending December 31, 2030.

 

“GHG Intensity Performance Target” means a reduction
of GHG Intensity of 35% during the GHG Intensity Performance Reference Period relative to the GHG Intensity for the Company’s 2018
fiscal year, provided that if the Company subsequently issues sustainability-linked notes linked to the same GHG Intensity Performance
Target and the same Environmental SPT Observation Date, but with a higher reduction target, the GHG Intensity Performance Target shall
be automatically adjusted upward to equal the GHG Intensity reduction percentage required by such subsequent sustainability-linked notes.

 

“GHG Protocol” means the second (2nd) revised
edition of the GHG Protocol Corporate Accounting and Reporting Standard of the World Business Council for Sustainable Development and
World Resources Institute available at https://ghgprotocol.org/sites/default/files/standards/ghg-protocolrevised.pdf. In the event an
updated version of the GHG Protocol is published, the Company may elect at its option to apply such revised version for the purposes
of calculating Absolute GHG Emissions.

 

“Percentage of Racial & Ethnic Diversity”
means the total number of permanent employees of the Company who self-identify as ethnic or racial minorities divided by the total number
of permanent employees of the Company, as calculated by the Company at the end of the fiscal year ending on the Social SPT Observation
Date.

 

“Percentage of Racial & Ethnic Diversity Performance
Target” means achieving a Percentage of Racial & Ethnic Diversity equal to or exceeding 28%, provided that if the Company
subsequently issues sustainability-linked notes linked to the same Percentage of Racial & Ethnic Diversity performance target
and the same Social SPT Observation Date, but with a higher percentage target, the Percentage of Racial & Ethnic Diversity Performance
Target shall be automatically adjusted upward to equal the Percentage of Racial & Ethnic Diversity required by such subsequent
sustainability-linked notes.

 

“Scope 1 Emissions” means, for any period, direct
greenhouse gas emissions or equivalent CO2 emissions occurring from sources that are controlled by the Company and its Subsidiaries in
the operation of their business, which are determined by the Company in accordance with the GHG Protocol and the Company’s internally
developed methodology.

 

“Scope 2 Emissions” means, for any period, indirect
greenhouse gas emissions or equivalent CO2 emissions occurring from the generation of purchased and imported electricity consumed by
the Company and its Subsidiaries in the operation of their business, which are determined by the Company in accordance with the GHG Protocol
and the Company’s internally developed methodology.

 

    A-4

     

    

 

“Social SPT Observation Date” means December 31,
2025.

 

“SPTs” means the GHG Intensity Performance Target
and the Percentage of Racial & Ethnic Diversity Performance Target.

 

“Subsidiary” means, solely with respect to the
definitions of “Scope 1 Emissions” and “Scope 2 Emissions”, with respect to the Company: (a) any corporation
of which at least a majority of the outstanding shares having by the terms thereof ordinary voting power to elect a majority of the board
of directors of such corporation (irrespective of whether at the time shares of any other class or classes of such corporation might
have voting power by reason of the happening of any contingency, unless the contingency has occurred and then only for as long as it
continues) is at the time directly, indirectly or beneficially owned or controlled by the Corporation or one or more of its Subsidiaries,
or by the Company and one or more of its Subsidiaries; (b) any partnership of which, at the time, the Corporation or one or more
of its Subsidiaries, or the Company and one or more of its Subsidiaries: (i) directly, indirectly or beneficially own or control
more than 50% of the income, capital, beneficial or ownership interests (however designated) thereof; and (ii) is a general partner
(or the general partner of a general partner), in the case of limited partnerships, or is a partner or has authority to bind the partnership,
in all other cases; or (c) any other person of which at least a majority of the income, capital, beneficial or ownership interests
(however designated) are at the time directly, indirectly or beneficially owned or controlled by the Company, or one or more of its Subsidiaries,
or the Company and one or more of its Subsidiaries.

 

		(6)	Interest
                                            Payment Dates: February 1 and August 1 of each year, beginning February 1,
                                            2022, subject to adjustment if any such day is not a Business Day.

 

		(7)	Regular
                                            Record Dates for Interest Payable on any Interest Payment Date: The interest so payable,
                                            and punctually paid or duly provided for, on any Interest Payment Date will be paid to the
                                            Person in whose name the Sustainability-Linked Senior Notes (or one or more Predecessor Securities)
                                            is registered at the close of business on the Regular Record Date for such interest, which
                                            shall be the January 15 or July 15, whether or not a Business Day, as the case
                                            may be, next preceding such Interest Payment Date. Any such interest not so punctually paid
                                            or duly provided for will forthwith cease to be payable to the Holder on such Regular Record
                                            Date and may either be paid to the Person in whose name the Sustainability-Linked Senior
                                            Note (or one or more Predecessor Securities) is registered at the close of business on a
                                            Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee,
                                            notice whereof shall be given to Holders of the Sustainability-Linked Senior Notes not less
                                            than 10 days prior to such Special Record Date, or be paid at any time in any other lawful
                                            manner not inconsistent with the requirements of any securities exchange on which the Sustainability-Linked
                                            Senior Notes may be listed, and upon such notice as may be required by such exchange, in
                                            each case, all as more fully provided in the Indenture.

 

    A-5

     

    

 

		(8)	Place
                                            of Payment for the Sustainability-Linked Senior Notes: The place of payment of the principal
                                            of (and premium, if any) and any such interest on the Sustainability-Linked Senior Notes
                                            will be the office or agency of the Company maintained for that purpose, which initially
                                            shall be the Trustee’s corporate trust office in the City of New York, in such coin
                                            or currency of the United States of America as at the time of payment is legal tender for
                                            payment of public and private debts, including by wire transfer of such payment to the person
                                            entitled to receive such payments as specified in the Security Register; provided, however,
                                            that at the option of the Company payment of interest may be made by check mailed to the
                                            address of the Person entitled thereto as such address shall appear in the Security Register.
                                            Notwithstanding the foregoing, payment of any amount payable in respect of a Global Security
                                            will be made in accordance with the applicable procedures of the Depositary.

 

		(9)	Optional
                                            Redemption: Prior to the date that is three months prior to the Sustainability-Linked
                                            Maturity Date, the notes of this series will be subject to redemption, in whole or in part,
                                            at the Company’s option at any time, or from time to time, at a Redemption Price equal
                                            to the greater of:

 

		a.	100%
                                            of the principal amount of the Sustainability-Linked Senior Notes to be redeemed, and

 

		b.	the Sustainability
                                            Make Whole Redemption Amount,

 

plus,
in either case, accrued interest on the principal amount being redeemed to the Sustainability-Linked Redemption Date. The Redemption
Price for the Sustainability-Linked Senior Notes to be redeemed on any Sustainability-Linked Redemption Date that is on or after the
date that is three months prior to the Sustainability-Linked Maturity Date will be equal to 100% of the principal amount of the Sustainability-Linked
Senior Notes being redeemed, plus accrued and unpaid interest on the principal amount being redeemed to the Sustainability-Linked
Redemption Date.

 

Notwithstanding
the foregoing, installments of interest on Sustainability-Linked Senior Notes being redeemed that are due and payable on Interest
Payment Dates falling on or prior to the relevant Sustainability-Linked Redemption Date will be payable to the Holders of Sustainability-Linked
Senior Notes registered at the close of business on the relevant record dates according to the terms and provisions of the Indenture.

 

Notice
of any redemption will be delivered by first-class mail at least 10 days, but not more than 60 days, before the Sustainability-Linked
Redemption Date to each Holder of the Sustainability-Linked Senior Notes to be redeemed.

 

    A-6

     

    

 

Unless
the Company defaults in payment of the Redemption Price, on and after the Sustainability-Linked Redemption Date, interest will cease
to accrue on the Sustainability-Linked Senior Notes or portions of the Sustainability-Linked Senior Notes called for redemption.

 

In
the case of a partial redemption of Sustainability-Linked Senior Notes, selection of such Sustainability-Linked Senior Notes for
redemption will be made on a pro rata basis. If any Sustainability-Linked Senior Note is redeemed in part, the notice of redemption
relating to such Sustainability-Linked Senior Note shall state the portion of the principal amount thereof to be redeemed; provided
that no Sustainability-Linked Senior Note in an aggregate principal amount of US$1,000 or less shall be redeemed in part. A replacement
Sustainability-Linked Senior Note in the principal amount equal to the unredeemed portion thereof will be issued in the name of the Holder
thereof upon cancellation of the original Sustainability-Linked Senior Note.

 

In connection with such optional redemption, the
following defined terms apply:

 

“Adjusted Treasury Rate” means, with
respect to any Sustainability-Linked Redemption Date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated
(on a day count basis) of the Comparable Treasury Issue (as defined below), assuming a price for the Comparable Treasury Issue (expressed
as a percentage of its principal amount) equal to the Comparable Treasury Price (as defined below) for the Sustainability-Linked Redemption
Date.

 

“Comparable Treasury Issue” means the
United States Treasury security or securities selected by the Quotation Agent (as defined below) as having an actual or interpolated
maturity comparable to the remaining term of the Sustainability-Linked Senior Notes to be redeemed (assuming that such Sustainability-Linked
Senior Notes matured May 1, 2033, the date that is three months prior to the Sustainability-Linked Maturity Date) that would be
utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities
of comparable maturity to the remaining term of the Sustainability-Linked Senior Notes to be redeemed.

 

“Comparable Treasury Price” means, with
respect to any Sustainability-Linked Redemption Date, (i) the average of the Reference Treasury Dealer Quotations (as defined below)
for such Sustainability-Linked Redemption Date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or
(ii) if the Quotation Agent obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations.

 

“Quotation Agent” means one of the Reference
Treasury Dealers, which is appointed by the Company.

 

“Reference Treasury Dealer” means each
of Credit Suisse Securities (USA) LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC and a Primary
Treasury Dealer (as defined below) selected by SMBC Nikko Securities America, Inc. and their respective successors; provided, however,
that if such entity or its successor shall cease to be a primary U.S. Government securities dealer in New York City (a “Primary
Treasury Dealer”), the Company shall substitute therefor another nationally recognized investment banking firm that is a Primary
Treasury Dealer.

 

    A-7

     

    

 

“Reference Treasury Dealer Quotations”
means, with respect to each Reference Treasury Dealer and any Sustainability-Linked Redemption Date, the average, as determined by the
Reference Treasury Dealer, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its
principal amount) quoted in writing to the Quotation Agent by such Reference Treasury Dealer at 3:30 p.m. (New York time) on the
third Business Day preceding such Sustainability-Linked Redemption Date.

 

“Second Step Up Interest Rate” means,
(i) if the First Step Up Interest Rate was in effect (or deemed to be in effect) immediately prior to the Second Step Up Date, the
Fully Adjusted Second Step Up Interest Rate or (ii) if the Initial Sustainability-Linked Interest Rate was in effect (or deemed
to be in effect) immediately prior to the Second Step Up Date, the Partially Adjusted Second Step Up Interest Rate.

 

“Sustainability-Linked Redemption Date”
means the date fixed for redemption of the Sustainability-Linked Senior Notes.

 

“Sustainability
Make Whole Redemption Amount” means the sum of the present values of the remaining scheduled payments of principal and interest
on the Sustainability-Linked Senior Notes to be redeemed (assuming that such Sustainability-Linked Senior Notes matured on May 1,
2033, the date that is three months prior to the Sustainability-Linked Maturity Date), not including any portion of the payments of interest
accrued as of the Sustainability-Linked Redemption Date (calculated at the Initial Sustainability-Linked Interest Rate (i) until
the First Step Up Date, at which point, the interest rate shall be deemed to be the First Step Up Interest Rate, unless the Company has
provided the Trustee with the applicable Satisfaction Notification with respect to the Percentage of Racial & Ethnic Diversity
Performance Target on or prior to the First Notification Due Date, in which case the interest rate shall remain at the Initial Sustainability-Linked
Interest Rate and (ii) until the Second Step Up Date, at which point, the interest rate shall be deemed to be increased to the Second
Step Up Interest Rate, unless the Company has provided the Trustee with the applicable Satisfaction Notification with respect to the
GHG Emissions Performance Target on or prior to the Second Notification Due Date, in which case the interest rate shall remain at the
interest rate it deemed to be applicable immediately prior to the Second Step Up Date pursuant to clause (i) of this paragraph,
discounted to the Sustainability-Linked Redemption Date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months)
at the Adjusted Treasury Rate (as defined above) plus 17 basis points.

 

In the event of redemption of the Sustainability-Linked
Senior Notes in part only, a new Sustainability-Linked Senior Note or notes of the series and of like tenor for the unredeemed portion
hereof will be issued in the name of the Holder thereof upon the cancellation thereof.

 

    A-8

     

    

 

		(10)	Additional
                                            Amounts:

 

The Company will, subject to the exceptions and
limitations set forth below, pay to the Holder of a Sustainability-Linked Senior Note who is a non-resident of Canada under the Income
Tax Act (Canada) such additional amounts as may be necessary so that every net payment on such Sustainability-Linked Senior Note,
after deduction or withholding by the Company or of any Paying Agent for or on account of any present or future tax, assessment or other
governmental charge (including penalties, interest and other liabilities related thereto) imposed by the government of Canada (or any
political subdivision or taxing authority thereof or therein) (collectively, “Canadian Taxes”) upon or as a result of such
payment, will not be less than the amount provided in the Sustainability-Linked Senior Notes to be then due and payable (and the Company
shall remit the full amount withheld to the relevant authority in accordance with applicable law); provided, however, that
the Company will not be required to make any payment of additional amounts:

 

		(a)	to any person in respect of whom such taxes are required to be withheld
                                            or deducted as a result of such person or any other person that has a beneficial interest
                                            in respect of any payment under the Sustainability-Linked Senior Notes not dealing at arm’s
                                            length with the Company (within the meaning of the Income Tax Act (Canada)), (ii) being
                                            a “specified shareholder” (as defined in subsection 18(5) of the Income
                                            Tax Act (Canada)) of the Company, or (iii) not dealing at arm’s length (for
                                            the purposes of the Income Tax Act (Canada)) with such a “specified shareholder”;

 

		(b)	to any person by reason of such person being connected with Canada (otherwise
                                            than merely by holding or ownership of a Sustainability-Linked Senior Note or receiving any
                                            payments or exercising any rights thereunder), including without limitation a non-resident
                                            insurer who carries on an insurance business in Canada and in a country other than Canada;

 

		(c)	for or on account of any tax, assessment or other governmental charge
                                            which would not have been so imposed but for: (i) the presentation by the Holder of
                                            a Sustainability-Linked Senior Note for payment on a date more than 30 days after the date
                                            on which such payment became due and payable or the date on which payment thereof is duly
                                            provided for, whichever occurs later; or (ii) the Holder’s failure to comply with
                                            any certification, identification, information, documentation or other reporting requirements
                                            if compliance is required by law, regulation, administrative practice or an applicable treaty
                                            as a precondition to exemption from or a reduction in the rate of deduction or withholding
                                            of, any such taxes, assessment or charge;

 

		(d)	for or on account of any estate, inheritance, gift, sales, transfer,
                                            personal property tax or any similar tax, assessment or other governmental charge;

 

		(e)	for or on account of any tax, assessment or other governmental charge
                                            required to be withheld by any Paying Agent from any payment to a person on a Sustainability-Linked
                                            Senior Note if such payment can be made to such person without such withholding by at least
                                            one other Paying Agent the identity of which is provided to such person;

 

    A-9

     

    

 

		(f)	for or on account of any tax, assessment or other governmental charge
                                            which is payable otherwise than by withholding from a payment on a Sustainability-Linked
                                            Senior Note;

 

		(g)	any withholding or deduction imposed pursuant to: (i) Sections
                                            1471 to 1474 of the U.S. Internal Revenue Code of 1986, as amended (“FATCA”),
                                            or any successor version thereof, or any similar legislation imposed by any other governmental
                                            authority, (ii) any treaty, law, regulation or other official guidance enacted by Canada
                                            implementing FATCA or an intergovernmental agreement with respect to FATCA or any similar
                                            legislation imposed by any other governmental authority, or (iii) any agreement between
                                            the Company or the Guarantors and the United States or any authority thereof implementing
                                            FATCA; or

 

		(h)	for any combination of items (a), (b), (c), (d), (e), (f) and (g).

 

nor will additional amounts be paid with respect to any payment on
a Sustainability-Linked Senior Note to a Holder who is a fiduciary or partnership or other than the sole beneficial owner of such payment
to the extent such payment would be required by the laws of Canada (or any political subdivision thereof) to be included in the income
for Canadian federal income tax purposes of a beneficiary or settlor with respect to such fiduciary or a member of such partnership or
a beneficial owner who would not have been entitled to payment of the additional amounts had such beneficiary, settlor, member or beneficial
owner been the Holder of such Sustainability-Linked Senior Note.

 

The Company will furnish to the Holders of the Sustainability-Linked
Senior Notes by mail, within 30 days after the date of the payment of any Canadian Taxes is due under applicable law, certified copies
of tax receipts or other documents evidencing such payment.

 

Wherever in the Sustainability-Linked Senior Notes
or the Indenture there is mentioned, in any context, the payment of principal (and premium, if any), interest or any other amount payable
under or with respect to the Sustainability-Linked Senior Notes, such mention shall be deemed to include mention of the payment of additional
amounts to the extent that, in such context additional amounts are, were or would be payable in respect thereof.

 

		(11)	Tax
                                            Redemption: The Sustainability-Linked Senior Notes will be subject to redemption at any
                                            time at a Redemption Price equal to the principal amount of the Sustainability-Linked Senior
                                            Notes, together with accrued and unpaid interest to the Sustainability-Linked Redemption
                                            Date, upon the giving of notice by first-class mail at least 10 days, but not more than 60
                                            days, before the Sustainability-Linked Redemption Date to each Holder of the Sustainability-Linked
                                            Senior Notes to be redeemed, if the Company (or its successor) determines that (1) as
                                            a result of (A) any amendment to or change (including any announced prospective change)
                                            in the laws or related regulations of Canada (or the Company’s successor’s jurisdiction
                                            of organization) or of any applicable political subdivision or taxing authority or (B) any
                                            amendment to or change in an interpretation or application of such laws or regulations by
                                            any legislative body, court, governmental agency or regulatory authority announced or becoming
                                            effective on or after June 24, 2021, the Company has or will become obligated to pay,
                                            on the next Interest Payment Date for the Sustainability-Linked Senior Notes, additional
                                            amounts with respect to any notes of the series as described above, or (2) on or after
                                            June 24, 2021, any action has been taken by any taxing authority of, or any decision
                                            has been rendered by a court in, Canada (or the Company’s successor’s jurisdiction
                                            of organization) or any applicable political subdivision or taxing authority, including any
                                            of those actions specified in (1) above, whether or not the action was taken or decision
                                            rendered with respect to the Company, or any change, amendment, application or interpretation
                                            is officially proposed, which, in the opinion of the Company’s counsel, will result
                                            in the Company becoming obligated to pay, on the next Interest Payment Date, additional amounts
                                            with respect to any note of the series, and the Company has determined that the obligation
                                            cannot be avoided by the use of reasonable available measures.

 

    A-10

     

    

 

		(12)	Denominations:
                                            The Sustainability-Linked Senior Notes are issuable only in registered form without coupons
                                            in denominations of US$2,000 and integral multiples of US$1,000 thereof.

 

		(13)	Sinking
                                            Fund: The Sustainability-Linked Senior Notes will not be subject to any sinking fund.

 

		(14)	Defeasance
                                            and Covenant Defeasance: The Sustainability-Linked Senior Notes will be subject to defeasance
                                            and discharge as provided in Sections 1302 and 1303 of the Indenture.

 

		(15)	Form of
                                            Securities: The Sustainability-Linked Senior Notes will be initially represented by fully
                                            registered global notes deposited in book-entry form with, or on behalf of, The Depository
                                            Trust Company (the “Depositary”), and registered in the name of Cede &
                                            Co., as nominee of the Depositary, or such other name as may be requested by an authorized
                                            representative of the Depositary. The Sustainability-Linked Senior Notes may be transferred
                                            or exchanged only through the Depositary and its participants, except under the circumstances
                                            specified in the Indenture.

 

    A-11

     

    

 

Terms of US$500,000,000 3.400% Senior Notes
due 2051

 

Capitalized terms used but not defined herein
shall have the meanings given to such terms in the Indenture.

 

		(1)	Title
                                            of Securities: “3.400% Senior Notes due 2051” (the “Senior Notes”).

 

		(2)	Total
                                            Aggregate Principal Amount of Senior Notes to be initially issued and sold to the Underwriters
                                            for Resale to the Public: US$500,00,000. The Company may, at any time, and from time
                                            to time, issue additional Senior Notes under the Indenture in unlimited amounts having the
                                            same terms as the Senior Notes, and such additional Senior Notes will, together with the
                                            then existing Senior Notes and any notes which may be issued in exchange or substitution
                                            therefor, constitute a single series of notes under the Indenture.

 

		(3)	Guarantees:
                                            In accordance with Section 1401 of the Indenture, the Senior Notes are guaranteed by
                                            both Guarantors.

 

		(4)	Maturity
                                            Date: August 1, 2051 (the “Senior Maturity Date”).

 

		(5)	Interest:
                                            The Senior Notes will bear interest at the rate of 3.400% per annum, accruing from June 28,
                                            2021, or from the most recent Interest Payment Date to which interest has been paid or duly
                                            provided for.

 

		(6)	Interest
                                            Payment Dates: February 1 and August 1 of each year, beginning February 1,
                                            2022, subject to adjustment if any such day is not a Business Day.

 

		(7)	Regular
                                            Record Dates for Interest Payable on any Interest Payment Date: The interest so payable,
                                            and punctually paid or duly provided for, on any Interest Payment Date will be paid to the
                                            Person in whose name the Senior Notes (or one or more Predecessor Securities) is registered
                                            on the close of business on the Regular Record Date for such interest, which shall be the
                                            January 15 or July 15, whether or not a Business Day, as the case may be, next
                                            preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided
                                            for will forthwith cease to be payable to the Holder on such Regular Record Date and may
                                            either be paid to the Person in whose name the Senior Note (or one or more Predecessor Securities)
                                            is registered at the close of business on a Special Record Date for the payment of such Defaulted
                                            Interest to be fixed by the Trustee, notice whereof shall be given to Holders of the Senior
                                            Notes not less than 10 days prior to such Special Record Date, or be paid at any time in
                                            any other lawful manner not inconsistent with the requirements of any securities exchange
                                            on which the Senior Notes may be listed, and upon such notice as may be required by such
                                            exchange, in each case, all as more fully provided in the Indenture.

 

		(8)	Place
                                            of Payment for the Senior Notes: The place of payment of the principal of (and premium,
                                            if any) and any such interest on the Senior Notes will be the office or agency of the Company
                                            maintained for that purpose, which initially shall be the Trustee’s corporate trust
                                            office in the City of New York, in such coin or currency of the United States of America
                                            as at the time of payment is legal tender for payment of public and private debts, including
                                            by wire transfer of such payment to the person entitled to receive such payments as specified
                                            in the Security Register; provided, however, that at the option of the Company payment of
                                            interest may be made by check mailed to the address of the Person entitled thereto as such
                                            address shall appear in the Security Register. Notwithstanding the foregoing, payment of
                                            any amount payable in respect of a Global Security will be made in accordance with the applicable
                                            procedures of the Depositary.

 

    A-12

     

    

 

		(9)	Optional
                                            Redemption: Prior to the date that is six months prior to the Senior Maturity Date, the
                                            notes of this series will be subject to redemption, in whole or in part, at the Company’s
                                            option at any time, or from time to time, at a Redemption Price equal to the greater of:

 

		a.	100%
                                            of the principal amount of the Senior Notes to be redeemed, and

 

		b.	the sum
                                            of the present values of the remaining scheduled payments of principal and interest on the
                                            Senior Notes to be redeemed (assuming that such Senior Notes matured on February 1,
                                            2051, the date that is six months prior to the Senior Maturity Date), not including any portion
                                            of the payments of interest accrued as of the date fixed for redemption of the Senior Notes
                                            (the “Senior Redemption Date”), discounted to the Senior Redemption Date on a
                                            semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Adjusted
                                            Treasury Rate (as defined below) plus 20 basis points,

 

plus,
in either case, accrued interest on the principal amount being redeemed to the Senior Redemption Date. The Redemption Price for the Senior
Notes to be redeemed on any Senior Redemption Date that is on or after the date that is six months prior to the Senior Maturity Date
will be equal to 100% of the principal amount of the Senior Notes being redeemed, plus accrued and unpaid interest on the principal
amount being redeemed to the Senior Redemption Date.

 

Notwithstanding
the foregoing, installments of interest on Senior Notes being redeemed that are due and payable on Interest Payment Dates falling
on or prior to the relevant Senior Redemption Date will be payable to the Holders of Senior Notes registered at the close of business
on the relevant record dates according to the terms and provisions of the Indenture.

 

Notice
of any redemption will be delivered by first-class mail at least 10 days, but not more than 60 days, before the Senior Redemption
Date to each Holder of the Senior Notes to be redeemed.

 

Unless
the Company defaults in payment of the Redemption Price, on and after the Senior Redemption Date, interest will cease to accrue on the
Senior Notes or portions of the Senior Notes called for redemption.

 

In
the case of a partial redemption of Senior Notes, selection of such Senior Notes for redemption will be made on a pro rata
basis. If any Senior Note is redeemed in part, the notice of redemption relating to such Senior Note shall state the portion of the
principal amount thereof to be redeemed; provided that no Senior Note in an aggregate principal amount of US$1,000 or less shall
be redeemed in part. A replacement Senior Note in the principal amount equal to the unredeemed portion thereof will be issued in the
name of the Holder thereof upon cancellation of the original Senior Note.

 

    A-13

     

    

 

In connection with such optional redemption, the
following defined terms apply:

 

“Adjusted Treasury Rate” means, with
respect to any Senior Redemption Date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated (on a
day count basis) of the Comparable Treasury Issue (as defined below), assuming a price for the Comparable Treasury Issue (expressed as
a percentage of its principal amount) equal to the Comparable Treasury Price (as defined below) for the Senior Redemption Date.

 

“Comparable
Treasury Issue” means the United States Treasury security or securities selected by the Quotation Agent (as defined below) as having
an actual or interpolated maturity comparable to the remaining term of the Senior Notes to be redeemed (assuming that such Senior Notes
matured February 1, 2051, the date that is six months prior to the Senior Maturity Date) that would be utilized, at the time
of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity
to the remaining term of the Senior Notes to be redeemed.

 

“Comparable Treasury Price” means, with
respect to any Senior Redemption Date, (i) the average of the Reference Treasury Dealer Quotations (as defined below) for such Senior
Redemption Date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (ii) if the Quotation Agent
obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations.

 

“Quotation Agent” means one of the Reference
Treasury Dealers, which is appointed by the Company.

 

“Reference Treasury Dealer” means each
of Credit Suisse Securities (USA) LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC and a Primary
Treasury Dealer (as defined below) selected by SMBC Nikko Securities America, Inc. and their respective successors; provided, however,
that if such entity or its successor shall cease to be a primary U.S. Government securities dealer in New York City (a “Primary
Treasury Dealer”), the Company shall substitute therefor another nationally recognized investment banking firm that is a Primary
Treasury Dealer.

 

“Reference Treasury Dealer Quotations”
means, with respect to each Reference Treasury Dealer and any Senior Redemption Date, the average, as determined by the Reference Treasury
Dealer, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount)
quoted in writing to the Quotation Agent by such Reference Treasury Dealer at 3:30 p.m. (New York time) on the third Business Day
preceding such Senior Redemption Date.

 

    A-14

     

    

 

In the event of redemption of the Senior Notes in
part only, a new Senior Note or notes of the series and of like tenor for the unredeemed portion hereof will be issued in the name of
the Holder thereof upon the cancellation thereof.

 

		(10)	Additional
                                            Amounts: The Company will, subject to the exceptions and limitations set forth below,
                                            pay to the Holder of a Senior Note who is a non-resident of Canada under the Income Tax
                                            Act (Canada) such additional amounts as may be necessary so that every net payment on
                                            such Senior Note, after deduction or withholding by the Company or of any Paying Agent for
                                            or on account of any present or future tax, assessment or other governmental charge (including
                                            penalties, interest and other liabilities related thereto) imposed by the government of Canada
                                            (or any political subdivision or taxing authority thereof or therein) (collectively, “Canadian
                                            Taxes”) upon or as a result of such payment, will not be less than the amount provided
                                            in the Senior Notes to be then due and payable (and the Company shall remit the full amount
                                            withheld to the relevant authority in accordance with applicable law); provided, however,
                                            that the Company will not be required to make any payment of additional amounts:

 

		(a)	to any person in respect of whom such taxes are required to be withheld
                                            or deducted as a result of such person or any other person that has a beneficial interest
                                            in respect of any payment under the Senior Notes not dealing at arm’s length with the
                                            Company (within the meaning of the Income Tax Act (Canada)), (ii) being a “specified
                                            shareholder” (as defined in subsection 18(5) of the Income Tax Act (Canada))
                                            of the Company, or (iii) not dealing at arm’s length (for the purposes of the
                                            Income Tax Act (Canada)) with such a “specified shareholder”;

 

		(b)	to any person by reason of such person being connected with Canada (otherwise
                                            than merely by holding or ownership of a Senior Note or receiving any payments or exercising
                                            any rights thereunder), including without limitation a non-resident insurer who carries on
                                            an insurance business in Canada and in a country other than Canada;

 

		(c)	for or on account of any tax, assessment or other governmental charge
                                            which would not have been so imposed but for: (i) the presentation by the Holder of
                                            a Senior Note for payment on a date more than 30 days after the date on which such payment
                                            became due and payable or the date on which payment thereof is duly provided for, whichever
                                            occurs later; or (ii) the Holder’s failure to comply with any certification, identification,
                                            information, documentation or other reporting requirements if compliance is required by law,
                                            regulation, administrative practice or an applicable treaty as a precondition to exemption
                                            from or a reduction in the rate of deduction or withholding of, any such taxes, assessment
                                            or charge;

 

		(d)	for or on account of any estate, inheritance, gift, sales, transfer,
                                            personal property tax or any similar tax, assessment or other governmental charge;

 

    A-15

     

    

 

		(e)	for or on account of any tax, assessment or other governmental charge
                                            required to be withheld by any Paying Agent from any payment to a person on a Senior Note
                                            if such payment can be made to such person without such withholding by at least one other
                                            Paying Agent the identity of which is provided to such person;

 

		(f)	for or on account of any tax, assessment or other governmental charge
                                            which is payable otherwise than by withholding from a payment on a Senior Note;

 

		(g)	any withholding or deduction imposed pursuant to: (i) Sections
                                            1471 to 1474 of the U.S. Internal Revenue Code of 1986, as amended (“FATCA”),
                                            or any successor version thereof, or any similar legislation imposed by any other governmental
                                            authority, (ii) any treaty, law, regulation or other official guidance enacted by Canada
                                            implementing FATCA or an intergovernmental agreement with respect to FATCA or any similar
                                            legislation imposed by any other governmental authority, or (iii) any agreement between
                                            the Company or the Guarantors and the United States or any authority thereof implementing
                                            FATCA; or

 

		(h)	for any combination of items (a), (b), (c), (d), (e), (f) and (g).

 

nor will additional amounts be paid with respect to any payment on
a Senior Note to a Holder who is a fiduciary or partnership or other than the sole beneficial owner of such payment to the extent such
payment would be required by the laws of Canada (or any political subdivision thereof) to be included in the income for Canadian federal
income tax purposes of a beneficiary or settlor with respect to such fiduciary or a member of such partnership or a beneficial owner
who would not have been entitled to payment of the additional amounts had such beneficiary, settlor, member or beneficial owner been
the Holder of such Senior Note.

 

The Company will furnish to the Holders of the Senior
Notes by mail, within 30 days after the date of the payment of any Canadian Taxes is due under applicable law, certified copies of tax
receipts or other documents evidencing such payment.

 

Wherever in the Senior Notes or the Indenture there
is mentioned, in any context, the payment of principal (and premium, if any), interest or any other amount payable under or with respect
to the Senior Notes, such mention shall be deemed to include mention of the payment of additional amounts to the extent that, in such
context additional amounts are, were or would be payable in respect thereof.

 

		(11)	Tax
                                            Redemption: The Senior Notes will be subject to redemption at any time at a Redemption
                                            Price equal to the principal amount of the Senior Notes, together with accrued and unpaid
                                            interest to the Senior Redemption Date, upon the giving of notice by first-class mail at
                                            least 10 days, but not more than 60 days, before the Senior Redemption Date to each Holder
                                            of the Senior Notes to be redeemed, if the Company (or its successor) determines that (1) as
                                            a result of (A) any amendment to or change (including any announced prospective change)
                                            in the laws or related regulations of Canada (or the Company’s successor’s jurisdiction
                                            of organization) or of any applicable political subdivision or taxing authority or (B) any
                                            amendment to or change in an interpretation or application of such laws or regulations by
                                            any legislative body, court, governmental agency or regulatory authority announced or becoming
                                            effective on or after June 24, 2021, the Company has or will become obligated to pay,
                                            on the next Interest Payment Date for the Senior Notes, additional amounts with respect to
                                            any notes of the series as described above, or (2) on or after June 24, 2021, any
                                            action has been taken by any taxing authority of, or any decision has been rendered by a
                                            court in, Canada (or the Company’s successor’s jurisdiction of organization)
                                            or any applicable political subdivision or taxing authority, including any of those actions
                                            specified in (1) above, whether or not the action was taken or decision rendered with
                                            respect to the Company, or any change, amendment, application or interpretation is officially
                                            proposed, which, in the opinion of the Company’s counsel, will result in the Company
                                            becoming obligated to pay, on the next Interest Payment Date, additional amounts with respect
                                            to any note of the series, and the Company has determined that the obligation cannot be avoided
                                            by the use of reasonable available measures.

 

    A-16

     

    

 

		(12)	Denominations:
                                            The Senior Notes are issuable only in registered form without coupons in denominations of
                                            US$2,000 and integral multiples of US$1,000 thereof.

 

		(13)	Sinking
                                            Fund: The Senior Notes will not be subject to any sinking fund.

 

		(14)	Defeasance
                                            and Covenant Defeasance: The Senior Notes will be subject to defeasance and discharge
                                            as provided in Sections 1302 and 1303 of the Indenture.

 

		(15)	Form of
                                            Securities: The Senior Notes will be initially represented by fully registered global
                                            notes deposited in book-entry form with, or on behalf of, The Depository Trust Company (the
                                            “Depositary”), and registered in the name of Cede & Co., as nominee
                                            of the Depositary, or such other name as may be requested by an authorized representative
                                            of the Depositary. The Senior Notes may be transferred or exchanged only through the Depositary
                                            and its participants, except under the circumstances specified in the Indenture.

 

    A-17

     

    

 

 

Exhibit B

 

    

     

    

 

THIS NOTE IS A GLOBAL SECURITY WITHIN
THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS NOTE MAY NOT
BE EXCHANGED IN WHOLE OR IN PART FOR A NOTE REGISTERED, AND NO TRANSFER OF THIS NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN
THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

 

UNLESS THIS CERTIFICATE IS PRESENTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY OR ITS AGENT
FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

 

    

     

    

 

ENBRIDGE INC.

 

2.500% Sustainability-

Linked Senior Notes due

2033

 

CUSIP No.:
29250N BF1

 

ISIN No.:
US29250NBF15

 

	No. R-1	US$500,000,000

 

ENBRIDGE INC., a corporation duly incorporated under
the Companies Act of the Northwest Territories and continued and existing under the Canada Business Corporations Act (herein called the
 “Company,” which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby
promises to pay to CEDE & CO., or registered assigns, the principal sum of $500,000,000 Dollars on August 1, 2033, and to
pay interest thereon from June 28, 2021 or from the most recent Interest Payment Date to which interest has been paid or duly provided
for, semi-annually on February 1 and August 1 in each year, commencing February 1, 2022 at the rate of 2.500% per annum
(the “Initial Interest Rate”), subject to increase as described in the reverse hereof, until the principal hereof is paid
or made available for payment. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as
provided in such Indenture, be paid to the Person in whose name this Note (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest, which shall be January 15 or July 15 (whether or not a Business
Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will
forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the Person in whose name this Note (or
one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted
Interest to be fixed by the Trustee, notice whereof shall be given to Holders of the Notes of this series not less than 10 days prior
to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities
exchange on which the Notes of this series may be listed, and upon such notice as may be required by such exchange, in each case, all
as more fully provided in said Indenture.

 

Payment of the principal of (and premium, if any)
and any such interest on this Note will be made at the office or agency of the Company maintained for that purpose in the City of New
York or Calgary, Alberta, Canada, in such coin or currency of the United States of America as at the time of payment is legal tender for
payment of public and private debts, including by wire transfer of such payment to the person entitled to receive such payments as specified
in the Security Register; provided, however, that at the option of the Company payment of interest may be made by check
mailed to the address of the Person entitled thereto as such address shall appear in the Security Register. Notwithstanding the foregoing,
payment of any amount payable in respect of a Global Security will be made in accordance with the applicable procedures of the Depositary.

 

    

     

    

 

Unless the certificate of authentication hereon has
been executed by the Trustee referred to on the reverse hereof by manual or electronic signature, this Note shall not be entitled to any
benefit under the Indenture or be valid or obligatory for any purpose.

 

    

     

    

 

IN WITNESS WHEREOF, the Company has caused this instrument
to be duly executed.

 

	 	ENBRIDGE INC.
	 	 
	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:

 

	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:

 

[Signature Page to Note]

 

    

     

    

 

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

 

This is one of the Securities of the series designated
therein referred to in the within-mentioned Indenture.

 

Dated: June ___, 2021

 

	 	
    Deutsche Bank Trust Company Americas,

    As Trustee

	 	 
	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:

 

[Certificate of Authentication]

 

    

     

    

 

(REVERSE OF NOTE)

 

Enbridge Inc.

 

2.500% Sustainability-

Linked Senior Notes due

2033

 

This Security is one of a duly authorized issue of
securities of the Company (herein called the “Notes”), issued and to be issued in one or more series under an Indenture, dated
as of February 25, 2005, between the Company and Deutsche Bank Trust Company Americas, as Trustee (herein called the “Trustee,”
which term includes any successor trustee under the Indenture), as amended and supplemented by the First Supplemental Indenture, dated
as of March 1, 2012, between the Company and the Trustee, the Sixth Supplemental Indenture, dated as of May 13, 2019, among
the Company, Spectra Energy Partners, LP (“SEP”), Enbridge Energy Partners, L.P. (“EEP” and, together with SEP,
the “Guarantors”) and the Trustee and the Eighth Supplemental Indenture, dated as of June 28, 2021, among the Company,
the Guarantors and the Trustee (herein called the “Indenture,” which term shall have the meaning assigned to it in such instrument),
and reference is hereby made to the Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder
of the Company, the Guarantors, the Trustee and the Holders of the Notes and of the terms upon which the Notes are, and are to be, authenticated
and delivered. This Note is one of the series designated as the 2.500% Sustainability-Linked Senior Notes due 2033 of the Company, issued
in initial aggregate principal amount of $1,000,000,000.

 

From and including August 1, 2026 (or if such
day is not a Business Day, the next succeeding Business Day) (the “First Step Up Date”), the interest rate payable on this
Note shall be increased by 5 basis points to 2.550% per annum (the “First Step Up Interest Rate”), unless the Company has
notified the Trustee in writing on or before the date that is 15 days prior to August 1, 2026 (the “First Notification
Due Date”) in the form of an Officers’ Certificate (the “Satisfaction Notification”) that the Company has determined
that (i) the Company has satisfied the Percentage of Racial & Ethnic Diversity Performance Target (as defined herein) and
(ii) the Company has received a related assurance letter from the External Verifier (as defined herein) (such letter, an “Assurance
Letter”). From and including August 1, 2031 (or if such day is not a Business Day, the next succeeding Business Day) (the “Second
Step Up Date”), the interest rate payable on this Note shall be increased by 50 basis points to (x) 3.050% per annum (the “Fully
Adjusted Second Step Up Interest Rate”) if the First Step Up Interest Rate was in effect immediately prior to the Second Step Up
Date or (y) 3.000% per annum (the “Partially Adjusted Second Step Up Interest Rate”) if the Initial Interest Rate was
in effect immediately prior to the Second Step Up Date, unless the Company has provided a Satisfaction Notification to the Trustee in
writing on or before the date that is 15 days prior to August 1, 2031 (the “Second Notification Due Date” and, with the
First Notification Due Date, each a “Notification Due Date”) that the Company has determined that (i) the Company has
satisfied the GHG Emission Performance Target (as defined herein) and (ii) the Company has received a related Assurance Letter from
the External Verifier.

 

    

     

    

 

Whenever in this Note there is mentioned, in any
context, the payment of amounts based upon the principal amount of this Note or of principal, interest or of any other amount payable
under, or with respect to, this Note, such mention shall be deemed to include mention of the payment of interest for this Note calculated
at the First Step Up Interest Rate, the Partially-Adjusted Second Step Up Interest Rate or the Fully Adjusted Second Step Up Interest
Rate, as context may require, to the extent that, in such context, interest calculated at the First Step Up Interest Rate, the Partially-Adjusted
Second Step Up Interest Rate or the Fully Adjusted Second Step Up Interest Rate, as applicable, is, was or would be payable in respect
thereof.

 

The interest rate applicable to this Note will only
be adjusted on the First Step Up Date and the Second Step Up Date based upon the satisfaction or non-satisfaction of a SPT on or prior
to the applicable Notification Due Date. Any satisfaction of a Step Up Target subsequent to the applicable Notification Due Date or cessation
of satisfaction, or any failure to satisfy a Step Up Target subsequent to the applicable Notification Due Date will not result in an adjustment
to the interest rate payable on this Note.

 

The Trustee shall not be obliged to monitor or inquire
as to whether the Step Up Targets have been satisfied. With respect to the rate at which this Note will bear interest, the Trustee shall
be fully protected in conclusively relying upon an Officers’ Certificate delivered to the Trustee by the Corporation on or prior
to the applicable Notification Due Date, which sets out the interest rate for this Note.

 

In connection with this interest determination provisions
of this Note and the redemption provisions described below, the following defined terms apply:

 

“Absolute GHG Emissions” means, for any
period, the total aggregate amount of Scope 1 Emissions and Scope 2 Emissions for such period, which, for greater certainty, will not
include the purchase of carbon offsets.

 

“Environmental SPT Observation Date”
means December 31, 2030.

 

“External Verifier” means one or more
qualified independent public accountants or environmental consultants (solely with respect to verifying the GHG Intensity Performance
Target) of recognized national standing designated from time to time by the Company to provide limited assurance on the Company’s
GHG Intensity and/or Percentage of Racial & Ethnic Diversity.

 

“GHG Intensity” means the Absolute GHG
Emissions per petajoule of energy delivered (throughput) by assets under the operational control of the Company and its Subsidiaries in
a fiscal year, as calculated at the end of such fiscal year in accordance with the Company’s internal throughput calculation methodology.
The Company may elect, without the consent of the Noteholders, to switch from the operational control method for calculating GHG Intensity
to an equity share method and make, in good faith, adjustments to the 2018 baseline GHG Intensity and the Company’s internal methodology
for calculating energy throughput and Absolute GHG Emissions in order to account for such switch.

 

    

     

    

 

“GHG Intensity Performance Reference Period”
means the fiscal year of the Company ending December 31, 2030.

 

“GHG Intensity Performance Target” means
a reduction of GHG Intensity of 35% during the GHG Intensity Performance Reference Period relative to the GHG Intensity for the Company’s
2018 fiscal year, provided that if the Company subsequently issues sustainability-linked notes linked to the same GHG Intensity Performance
Target and the same Environmental SPT Observation Date, but with a higher reduction target, the GHG Intensity Performance Target shall
be automatically adjusted upward to equal the GHG Intensity reduction percentage required by such subsequent sustainability-linked notes.

 

“GHG Protocol” means the second (2nd)
revised edition of the GHG Protocol Corporate Accounting and Reporting Standard of the World Business Council for Sustainable Development
and World Resources Institute available at https://ghgprotocol.org/sites/default/files/standards/ghg-protocolrevised.pdf. In the event
an updated version of the GHG Protocol is published, the Company may elect at its option to apply such revised version for the purposes
of calculating Absolute GHG Emissions.

 

“Percentage of Racial & Ethnic Diversity”
means the total number of permanent employees of the Company who self-identify as ethnic or racial minorities divided by the total number
of permanent employees of the Company, as calculated by the Company at the end of the fiscal year ending on the Social SPT Observation
Date.

 

“Percentage of Racial & Ethnic Diversity
Performance Target” means achieving a Percentage of Racial & Ethnic Diversity equal to or exceeding 28%, provided that
if the Company subsequently issues sustainability-linked notes linked to the same Percentage of Racial & Ethnic Diversity performance
target and the same Social SPT Observation Date, but with a higher percentage target, the Percentage of Racial & Ethnic Diversity
Performance Target shall be automatically adjusted upward to equal the Percentage of Racial & Ethnic Diversity required by such
subsequent sustainability-linked notes.

 

“Scope 1 Emissions” means, for any period,
direct greenhouse gas emissions or equivalent CO2 emissions occurring from sources that are controlled by the Company and its Subsidiaries
in the operation of their business, which are determined by the Company in accordance with the GHG Protocol and the Company’s internally
developed methodology.

 

“Scope 2 Emissions” means, for any period,
indirect greenhouse gas emissions or equivalent CO2 emissions occurring from the generation of purchased and imported electricity consumed
by the Company and its Subsidiaries in the operation of their business, which are determined by the Company in accordance with the GHG
Protocol and the Company’s internally developed methodology.

 

“Social SPT Observation Date” means December 31,
2025.

 

“SPTs” means the GHG Intensity Performance
Target and the Percentage of Racial & Ethnic Diversity Performance Target.

 

    

     

    

 

“Subsidiary” means, solely with respect
to the definitions of “Scope 1 Emissions” and “Scope 2 Emissions”, with respect to the Corporation: (a) any
corporation of which at least a majority of the outstanding shares having by the terms thereof ordinary voting power to elect a majority
of the board of directors of such corporation (irrespective of whether at the time shares of any other class or classes of such corporation
might have voting power by reason of the happening of any contingency, unless the contingency has occurred and then only for as long as
it continues) is at the time directly, indirectly or beneficially owned or controlled by the Corporation or one or more of its Subsidiaries,
or by the Corporation and one or more of its Subsidiaries; (b) any partnership of which, at the time, the Corporation or one or more
of its Subsidiaries, or the Corporation and one or more of its Subsidiaries: (i) directly, indirectly or beneficially own or control
more than 50% of the income, capital, beneficial or ownership interests (however designated) thereof; and (ii) is a general partner
(or the general partner of a general partner), in the case of limited partnerships, or is a partner or has authority to bind the partnership,
in all other cases; or (c) any other person of which at least a majority of the income, capital, beneficial or ownership interests
(however designated) are at the time directly, indirectly or beneficially owned or controlled by the Corporation, or one or more of its
Subsidiaries, or the Corporation and one or more of its Subsidiaries.

 

The Company will, subject to the exceptions and limitations
set forth below, pay to the Holder of a Note who is a non-resident of Canada under the Income Tax Act (Canada) such additional
amounts as may be necessary so that every net payment on such Note, after deduction or withholding by the Company or of any Paying Agent
for or on account of any present or future tax, assessment or other governmental charge (including penalties, interest and other liabilities
related thereto) imposed by the government of Canada (or any political subdivision or taxing authority thereof or therein) (collectively,
 “Canadian Taxes”) upon or as a result of such payment, will not be less than the amount provided in the Notes to be then due
and payable (and the Company shall remit the full amount withheld to the relevant authority in accordance with applicable law); provided,
however, that the Company will not be required to make any payment of additional amounts:

 

		(a)	to any person in respect of whom such taxes are required to be withheld or deducted as a result of such person or any other person
that has a beneficial interest in respect of any payment under the Notes not dealing at arm’s length with the Company (within the
meaning of the Income Tax Act (Canada)), (ii) being a “specified shareholder” (as defined in subsection 18(15)
of the Income Tax Act (Canada)) of the Company, or (iii) not dealing at arm’s length (for the purposes of the Income
Tax Act (Canada)) with such a “specified shareholder”;

 

		(b)	to any person by reason of such person being connected with Canada (otherwise than merely by holding or ownership of a Note or receiving
any payments or exercising any rights thereunder), including without limitation a non-resident insurer who carries on an insurance business
in Canada and in a country other than Canada;

 

    

     

    

 

		(c)	for or on account of any tax, assessment or other governmental charge which would not have been so imposed
but for: (i) the presentation by the Holder of a Note for payment on a date more than 30 days after the date on which such payment
became due and payable or the date on which payment thereof is duly provided for, whichever occurs later; or (ii) the Holder’s
failure to comply with any certification, identification, information, documentation or other reporting requirements if compliance
is required by law, regulation, administrative practice or an applicable treaty as a precondition to exemption from or a reduction in
the rate of deduction or withholding of, any such taxes, assessment or charge;

 

		(d)	for or on account of any estate, inheritance, gift, sales, transfer, personal property tax or any similar tax, assessment or other
governmental charge;

 

		(e)	for or on account of any tax, assessment or other governmental charge required to be withheld by any Paying Agent from any payment
to a person on a Note if such payment can be made to such person without such withholding by at least one other Paying Agent the identity
of which is provided to such person;

 

		(f)	for or on account of any tax, assessment or other governmental charge which is payable otherwise than by withholding from a payment
on a Note;

 

		(g)	any withholding or deduction imposed pursuant to: (i) Sections 1471 to 1474 of the U.S. Internal Revenue Code of 1986, as amended
(“FATCA”), or any successor version thereof, or any similar legislation imposed by any other governmental authority, (ii) any
treaty, law, regulation or other official guidance enacted by Canada implementing FATCA or an intergovernmental agreement with respect
to FATCA or any similar legislation imposed by any other governmental authority, or (iii) any agreement between the Company or the
Guarantors and the United States or any authority thereof implementing FATCA; or

 

		(h)	for any combination of items (a), (b), (c), (d), (e), (f) and (g);

 

nor will additional amounts be paid with respect to any payment on
a Note to a Holder who is a fiduciary or partnership or other than the sole beneficial owner of such payment to the extent such payment
would be required by the laws of Canada (or any political subdivision thereof) to be included in the income for Canadian federal income
tax purposes of a beneficiary or settlor with respect to such fiduciary or a member of such partnership or a beneficial owner who would
not have been entitled to payment of the additional amounts had such beneficiary, settlor, member or beneficial owner been the Holder
of such Note.

 

The Company will furnish to the Holders of the Notes
by mail, within 30 days after the date of the payment of any Canadian Taxes is due under applicable law, certified copies of tax receipts
or other documents evidencing such payment.

 

Wherever in this Note or the Indenture there is mentioned,
in any context, the payment of principal (and premium, if any), interest or any other amount payable under or with respect to the Notes,
such mention shall be deemed to include mention of the payment of additional amounts to the extent that, in such context additional amounts
are, were or would be payable in respect thereof.

 

    

     

    

 

The Company may, at any time, and from time to time,
issue additional Notes under the Indenture in unlimited amounts having the same terms as this Note, and such additional Notes will, together
with this Note and any Notes which may be issued in exchange or substitution herefor, constitute a single series of Notes under the Indenture.

 

Prior to the date that is three months prior to Maturity,
the Notes of this series will be subject to redemption, in whole or in part, at the Company’s option at any time, or from time to
time, at a Redemption Price equal to the greater of:

 

		·	100% of the principal amount of the Notes to be redeemed, and

		·	the Sustainability Make Whole Redemption Amount,

 

plus, in either case, accrued interest on the principal amount being
redeemed to the Redemption Date. The Redemption Price for the Notes to be redeemed on any Redemption Date that is on or after the date
that is three months prior to Maturity of the Notes will be equal to 100% of the principal amount of the Notes being redeemed, plus accrued
and unpaid interest on the principal amount being redeemed to the Redemption Date.

 

Notwithstanding the foregoing, installments of interest
on Notes being redeemed that are due and payable on Interest Payment Dates falling on or prior to the relevant Redemption Date will be
payable to the Holders of Notes registered at the close of business on the relevant record dates according to the terms and provisions
of the Indenture.

 

Notice of any redemption will be delivered by first-class
mail at least 10 days, but not more than 60 days, before the Redemption Date to each Holder of the Notes to be redeemed.

 

Unless the Company defaults
in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Notes or portions of the Notes
called for redemption.

 

In the case of a partial redemption of Notes, selection
of such Notes for redemption will be made on a pro rata basis. If any Note is redeemed in part, the notice of redemption relating to such
Note shall state the portion of the principal amount thereof to be redeemed; provided that no Note in an aggregate principal amount
of US$1,000 or less shall be redeemed in part. A replacement Note in the principal amount equal to the unredeemed portion thereof will
be issued in the name of the Holder thereof upon cancellation of the original Note.

 

In connection with the interest determination provisions
of this Note and such optional redemption, the following defined terms apply:

 

“Adjusted Treasury Rate” means, with respect
to any Redemption Date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated (on a day count
basis) of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its
principal amount) equal to the Comparable Treasury Price for the Redemption Date.

 

    

     

    

 

“Comparable Treasury Issue” means the
United States Treasury security or securities selected by the Quotation Agent as having an actual or interpolated maturity comparable
to the remaining term of the Notes to be redeemed (assuming that such Notes matured on May 1, 2033, the date that is three months
prior to Maturity of the Notes) that would be utilized, at the time of selection and in accordance with customary financial practice,
in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Notes.

 

“Comparable Treasury Price” means, with
respect to any Redemption Date, (i) the average of the Reference Treasury Dealer Quotations for such Redemption Date, after excluding
the highest and lowest such Reference Treasury Dealer Quotations, or (ii) if the Quotation Agent obtains fewer than four such Reference
Treasury Dealer Quotations, the average of all such quotations.

 

“Quotation Agent” means one of the Reference
Treasury Dealers, which is appointed by the Company.

 

“Reference Treasury Dealer” means each
of Credit Suisse Securities (USA) LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC and a Primary
Treasury Dealer (as defined below) selected by SMBC Nikko Securities America, Inc. and their respective successors; provided, however,
that if such entity or its successor shall cease to be a primary U.S. Government securities dealer in New York City (a “Primary
Treasury Dealer”), the Company shall substitute therefor another nationally recognized investment banking firm that is a Primary
Treasury Dealer.

 

“Reference Treasury Dealer Quotations”
means, with respect to each Reference Treasury Dealer and any Redemption Date, the average, as determined by the Reference Treasury Dealer,
of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted
in writing to the Quotation Agent by such Reference Treasury Dealer at 3:30 p.m. (New York time) on the third business day preceding
such Redemption Date.

 

“Second Step Up Interest Rate” means,
(i) if the First Step Up Interest Rate was in effect (or deemed to be in effect) immediately prior to the Second Step Up Date, the
Fully Adjusted Second Step Up Interest Rate or (ii) if the Initial Interest Rate was in effect (or deemed to be in effect) immediately
prior to the Second Step Up Date, the Partially Adjusted Second Step Up Interest Rate.

 

“Sustainability
Make Whole Redemption Amount” means the sum of the present values of the remaining scheduled payments of principal and interest
on the Notes to be redeemed (assuming that such Notes matured on May 1, 2033, the date that is three months prior to Maturity of
the Notes), not including any portion of the payments of interest accrued as of the Redemption Date (calculated
at the Initial Interest Rate (i) until the First Step Up Date, at which point, the interest rate shall be deemed to be the First
Step Up Interest Rate, unless the Company has provided the Trustee with the applicable Satisfaction Notification with respect to the Percentage
of Racial & Ethnic Diversity Performance Target on or prior to the First Notification Due Date, in which case the interest rate
shall remain at the Initial Interest Rate and (ii) until the Second Step Up Date, at which point, the interest rate shall be deemed
to be increased to the Second Step Up Interest Rate, unless the Company has provided the Trustee with the applicable Satisfaction Notification
with respect to the GHG Emissions Performance Target on or prior to the Second Notification Due Date, in which case the interest rate
shall remain at the interest rate it deemed to be applicable immediately prior to the Second Step Up Date pursuant to clause (i) of
this paragraph, discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months)
at the Adjusted Treasury Rate (as defined above) plus 17 basis points.

 

    

     

    

 

In the event of redemption of this Note in part only,
a new Note or Notes of this series and of like tenor for the unredeemed portion hereof will be issued in the name of the Holder hereof
upon the cancellation hereof.

 

The Notes of this series will be subject to redemption
at any time at a Redemption Price equal to the principal amount of the Notes, together with accrued and unpaid interest to the Redemption
Date, upon the giving of notice by first-class mail at least 10 days, but not more than 60 days, before the Redemption Date to each Holder
of the Notes to be redeemed, if the Company (or its successor) determines that (1) as a result of (A) any amendment to or change
(including any announced prospective change) in the laws or related regulations of Canada (or the Company’s successor’s jurisdiction
of organization) or of any applicable political subdivision or taxing authority or (B) any amendment to or change in an interpretation
or application of such laws or regulations by any legislative body, court, governmental agency or regulatory authority announced or becoming
effective on or after June 24, 2021, the Company has or will become obligated to pay, on the next Interest Payment Date for the Notes,
additional amounts with respect to any Notes of the series as described above, or (2) on or after June 24, 2021, any action
has been taken by any taxing authority of, or any decision has been rendered by a court in, Canada (or the Company’s successor’s
jurisdiction of organization) or any applicable political subdivision or taxing authority, including any of those actions specified in
(1) above, whether or not the action was taken or decision rendered with respect to the Company, or any change, amendment, application
or interpretation is officially proposed, which, in the opinion of the Company’s counsel, will result in the Company becoming obligated
to pay, on the next Interest Payment Date, additional amounts with respect to any Note of the series, and the Company has determined that
the obligation cannot be avoided by the use of reasonable available measures.

 

The Indenture contains provisions for defeasance
at any time of the entire indebtedness of this Note or certain restrictive covenants and Events of Default with respect to this Note,
in each case upon compliance with certain conditions set forth in the Indenture.

 

If an Event of Default with
respect to Notes of this series shall occur and be continuing, the principal of the Notes of this series may be declared due and payable
in the manner and with the effect provided in the Indenture.

 

The Indenture permits, with certain exceptions as
therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders
of the Notes of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders
of a majority in principal amount of the Notes at the time Outstanding of each series to be affected. The Indenture also contains provisions
permitting the Holders of specified percentages in principal amount of the Notes of each series at the time Outstanding, on behalf of
the Holders of all Notes of such series, to waive compliance by the Company with certain provisions of the Indenture and certain past
defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Note shall be conclusive and binding
upon such Holder and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange
herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

 

    

     

    

 

As provided in and subject to the provisions of the
Indenture, the Holder of this Note shall not have the right to institute any proceeding with respect to the Indenture or for the appointment
of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice
of a continuing Event of Default with respect to the Notes of this series, the Holders of not less than 25% in principal amount of the
Notes of this series at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such
Event of Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee shall not have received from the Holders of
a majority in principal amount of Notes of this series at the time Outstanding a direction inconsistent with such request, and shall have
failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer of indemnity. The foregoing shall
not apply to any suit instituted by the Holder of this Note for the enforcement of any payment of principal hereof or any premium or interest
hereon on or after the respective due dates expressed herein.

 

No reference herein to the Indenture and no provision
of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the
principal of and any premium and interest on this Note at the times, place and rate, and in the coin or currency, herein prescribed.

 

As provided
in the Indenture and subject to certain limitations therein set forth, certain obligations of the Company under the Indenture and this
Note are guaranteed pursuant to guarantees endorsed hereon as provided in the Indenture.  Each Holder, by holding this Note, agrees
to all of the terms and provisions of said guarantees.  The Indenture provides that either guarantor shall be released from its guarantee
upon the occurrence of certain events.

 

As provided in the Indenture and subject to certain
limitations therein set forth, the transfer of this Note is registrable in the Security Register, upon surrender of this Note for registration
of transfer at the office or agency of the Company in any place where the principal of and any premium and interest on this Note are payable,
duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly
executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes of this series and of like
tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

 

    

     

    

 

The Notes of this series are issuable only in registered
form without coupons in denominations of US$2,000 and integral multiples of US$1,000 thereof. As provided in the Indenture and subject
to certain limitations therein set forth, Notes of this series are exchangeable for a like aggregate principal amount of Notes of this
series and of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

 

No service charge shall be made for any such registration
of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable
in connection therewith.

 

Prior to due presentment of this Note for registration
of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Note is registered
as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Company, the Trustee nor any such agent shall
be affected by notice to the contrary.

 

All terms used in this Note which are not defined
in this Note and are defined in the Indenture shall have the meanings assigned to them in the Indenture.

 

    

     

    

 

 

Exhibit C

 

     

     

    

 

THIS NOTE IS A GLOBAL SECURITY WITHIN
THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS NOTE MAY NOT
BE EXCHANGED IN WHOLE OR IN PART FOR A NOTE REGISTERED, AND NO TRANSFER OF THIS NOTE IN WHOLE OR IN PART MAY BE REGISTERED, IN
THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

 

UNLESS THIS CERTIFICATE IS PRESENTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY OR ITS AGENT
FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

 

     

     

    

 

ENBRIDGE INC.

 

3.400% Senior Notes due

2051

 

CUSIP No.:
29250N BE4

 

ISIN No.:
US29250NBE40

 

	No. R-1	US$500,000,000

 

ENBRIDGE INC., a corporation duly incorporated under
the Companies Act of the Northwest Territories and continued and existing under the Canada Business Corporations Act (herein called the
 “Company,” which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby
promises to pay to CEDE & CO., or registered assigns, the principal sum of $500,000,000 Dollars on August 1, 2051,
and to pay interest thereon from June 28, 2021 or from the most recent Interest Payment Date to which interest has been paid or duly
provided for, semi-annually on February 1 and August 1 in each year, commencing February 1, 2022 at the rate of 3.400%
per annum, until the principal hereof is paid or made available for payment. The interest so payable, and punctually paid or duly provided
for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Note (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be January 15 or July 15
(whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid
or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the Person
in whose name this Note (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the
payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of the Notes of this series not
less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements
of any securities exchange on which the Notes of this series may be listed, and upon such notice as may be required by such exchange,
in each case, all as more fully provided in said Indenture.

 

Payment of the principal of (and premium, if any)
and any such interest on this Note will be made at the office or agency of the Company maintained for that purpose in the City of New
York or Calgary, Alberta, Canada, in such coin or currency of the United States of America as at the time of payment is legal tender for
payment of public and private debts, including by wire transfer of such payment to the person entitled to receive such payments as specified
in the Security Register; provided, however, that at the option of the Company payment of interest may be made by check
mailed to the address of the Person entitled thereto as such address shall appear in the Security Register. Notwithstanding the foregoing,
payment of any amount payable in respect of a Global Security will be made in accordance with the applicable procedures of the Depositary.

 

     

     

    

 

Unless the certificate of authentication hereon has
been executed by the Trustee referred to on the reverse hereof by manual or electronic signature, this Note shall not be entitled to any
benefit under the Indenture or be valid or obligatory for any purpose.

 

     

     

    

 

IN WITNESS WHEREOF, the Company has caused this instrument
to be duly executed.

 

	 	ENBRIDGE INC.

 

	 	By:	 
	 	 	Name:
	 	 	Title:

 

	 	By:	 
	 	 	Name:
	 	 	Title:

 

[Signature Page to Note]

 

     

     

    

 

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

 

This is one of the Securities of the series designated
therein referred to in the within-mentioned Indenture.

 

Dated: June ___, 2021

 

	 	Deutsche Bank Trust Company Americas, As Trustee

 

	 	By:	 
	 	 	Name:
	 	 	Title:

 

[Certificate of Authentication]

 

     

     

    

 

(REVERSE OF NOTE)

 

Enbridge Inc.

 

3.400% Senior Notes due

2051

 

This Security is one of a duly authorized issue of
securities of the Company (herein called the “Notes”), issued and to be issued in one or more series under an Indenture, dated
as of February 25, 2005, between the Company and Deutsche Bank Trust Company Americas, as Trustee (herein called the “Trustee,”
which term includes any successor trustee under the Indenture), as amended and supplemented by the First Supplemental Indenture, dated
as of March 1, 2012, between the Company and the Trustee, the Sixth Supplemental Indenture, dated as of May 13, 2019, among
the Company, Spectra Energy Partners, LP (“SEP”), Enbridge Energy Partners, L.P. (“EEP” and, together with SEP,
the “Guarantors”) and the Trustee and the Eighth Supplemental Indenture, dated as of June 28, 2021, among the Company,
the Guarantors and the Trustee (herein called the “Indenture,” which term shall have the meaning assigned to it in such instrument),
and reference is hereby made to the Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder
of the Company, the Guarantors, the Trustee and the Holders of the Notes and of the terms upon which the Notes are, and are to be, authenticated
and delivered. This Note is one of the series designated as the 3.400% Senior Notes due 2051 of the Company, issued in initial aggregate
principal amount of $500,000,000.

 

The Company will, subject to the exceptions and limitations
set forth below, pay to the Holder of a Note who is a non-resident of Canada under the Income Tax Act (Canada) such additional
amounts as may be necessary so that every net payment on such Note, after deduction or withholding by the Company or of any Paying Agent
for or on account of any present or future tax, assessment or other governmental charge (including penalties, interest and other liabilities
related thereto) imposed by the government of Canada (or any political subdivision or taxing authority thereof or therein) (collectively,
 “Canadian Taxes”) upon or as a result of such payment, will not be less than the amount provided in the Notes to be then due
and payable (and the Company shall remit the full amount withheld to the relevant authority in accordance with applicable law); provided,
however, that the Company will not be required to make any payment of additional amounts:

 

		(a)	to any person in respect of whom such taxes are required to be withheld or deducted as a result of such person or any other person
that has a beneficial interest in respect of any payment under the Notes not dealing at arm’s length with the Company (within the
meaning of the Income Tax Act (Canada)), (ii) being a “specified shareholder” (as defined in subsection 18(15)
of the Income Tax Act (Canada)) of the Company, or (iii) not dealing at arm’s length (for the purposes of the Income
Tax Act (Canada)) with such a “specified shareholder”;

 

     

     

    

 

		(b)	to any person by reason of such person being connected with Canada (otherwise than merely by holding or ownership of a Note or receiving
any payments or exercising any rights thereunder), including without limitation a non-resident insurer who carries on an insurance business
in Canada and in a country other than Canada;

 

		(c)	for or on account of any tax, assessment or other governmental charge which would not have been so imposed
but for: (i) the presentation by the Holder of a Note for payment on a date more than 30 days after the date on which such payment
became due and payable or the date on which payment thereof is duly provided for, whichever occurs later; or (ii) the Holder’s
failure to comply with any certification, identification, information, documentation or other reporting requirements if compliance
is required by law, regulation, administrative practice or an applicable treaty as a precondition to exemption from or a reduction in
the rate of deduction or withholding of, any such taxes, assessment or charge;

 

		(d)	for or on account of any estate, inheritance, gift, sales, transfer, personal property tax or any similar tax, assessment or other
governmental charge;

 

		(e)	for or on account of any tax, assessment or other governmental charge required to be withheld by any Paying Agent from any payment
to a person on a Note if such payment can be made to such person without such withholding by at least one other Paying Agent the identity
of which is provided to such person;

 

		(f)	for or on account of any tax, assessment or other governmental charge which is payable otherwise than by withholding from a payment
on a Note;

 

		(g)	any withholding or deduction imposed pursuant to: (i) Sections 1471 to 1474 of the U.S. Internal Revenue Code of 1986, as amended
(“FATCA”), or any successor version thereof, or any similar legislation imposed by any other governmental authority, (ii) any
treaty, law, regulation or other official guidance enacted by Canada implementing FATCA or an intergovernmental agreement with respect
to FATCA or any similar legislation imposed by any other governmental authority, or (iii) any agreement between the Company or the
Guarantors and the United States or any authority thereof implementing FATCA; or

 

		(h)	for any combination of items (a), (b), (c), (d), (e), (f) and (g);

 

nor will additional amounts be paid with respect to any payment on
a Note to a Holder who is a fiduciary or partnership or other than the sole beneficial owner of such payment to the extent such payment
would be required by the laws of Canada (or any political subdivision thereof) to be included in the income for Canadian federal income
tax purposes of a beneficiary or settlor with respect to such fiduciary or a member of such partnership or a beneficial owner who would
not have been entitled to payment of the additional amounts had such beneficiary, settlor, member or beneficial owner been the Holder
of such Note.

 

     

     

    

 

The Company will furnish to the Holders of the Notes
by mail, within 30 days after the date of the payment of any Canadian Taxes is due under applicable law, certified copies of tax receipts
or other documents evidencing such payment.

 

Wherever in this Note or the Indenture there is mentioned,
in any context, the payment of principal (and premium, if any), interest or any other amount payable under or with respect to the Notes,
such mention shall be deemed to include mention of the payment of additional amounts to the extent that, in such context additional amounts
are, were or would be payable in respect thereof.

 

The Company may, at any time, and from time to time,
issue additional Notes under the Indenture in unlimited amounts having the same terms as this Note, and such additional Notes will, together
with this Note and any Notes which may be issued in exchange or substitution herefor, constitute a single series of Notes under the Indenture.

 

Prior to the date that is six months prior to Maturity,
the Notes of this series will be subject to redemption, in whole or in part, at the Company’s option at any time, or from time to
time, at a Redemption Price equal to the greater of:

 

		•	100% of the principal amount of the Notes to be redeemed, and

 

		•	the sum of the present values of the remaining scheduled payments of principal and interest on the Notes to be redeemed (assuming
that such Notes matured on February 1, 2051, the date that is six months prior to Maturity of the Notes), not including any portion
of the payments of interest accrued as of the Redemption Date, discounted to the Redemption Date on a semi-annual basis (assuming a 360-day
year consisting of twelve 30-day months) at the Adjusted Treasury Rate (as defined below) plus 20 basis points,

 

plus, in either case, accrued interest on the principal amount being
redeemed to the Redemption Date. The Redemption Price for the Notes to be redeemed on any Redemption Date that is on or after the date
that is six months prior to Maturity of the Notes will be equal to 100% of the principal amount of the Notes being redeemed, plus accrued
and unpaid interest on the principal amount being redeemed to the Redemption Date.

 

Notwithstanding the foregoing, installments of interest
on Notes being redeemed that are due and payable on Interest Payment Dates falling on or prior to the relevant Redemption Date will be
payable to the Holders of Notes registered at the close of business on the relevant record dates according to the terms and provisions
of the Indenture.

 

Notice of any redemption will be delivered by first-class
mail at least 10 days, but not more than 60 days, before the Redemption Date to each Holder of the Notes to be redeemed.

 

Unless the Company defaults
in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Notes or portions of the Notes
called for redemption.

 

     

     

    

 

In the case of a partial redemption of Notes, selection
of such Notes for redemption will be made on a pro rata basis. If any Note is redeemed in part, the notice of redemption relating to such
Note shall state the portion of the principal amount thereof to be redeemed; provided that no Note in an aggregate principal amount
of US$1,000 or less shall be redeemed in part. A replacement Note in the principal amount equal to the unredeemed portion thereof will
be issued in the name of the Holder thereof upon cancellation of the original Note.

 

In connection with such optional redemption, the following
defined terms apply:

 

“Adjusted Treasury Rate”
means, with respect to any Redemption Date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated
(on a day count basis) of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a
percentage of its principal amount) equal to the Comparable Treasury Price for the Redemption Date.

 

“Comparable Treasury Issue” means the
United States Treasury security or securities selected by the Quotation Agent as having an actual or interpolated maturity comparable
to the remaining term of the Notes to be redeemed (assuming that such Notes matured on February 1, 2051, the date that is six months
prior to Maturity of the Notes) that would be utilized, at the time of selection and in accordance with customary financial practice,
in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Notes.

 

“Comparable Treasury Price” means, with
respect to any Redemption Date, (i) the average of the Reference Treasury Dealer Quotations for such Redemption Date, after excluding
the highest and lowest such Reference Treasury Dealer Quotations, or (ii) if the Quotation Agent obtains fewer than four such Reference
Treasury Dealer Quotations, the average of all such quotations.

 

“Quotation Agent” means one of the Reference
Treasury Dealers, which is appointed by the Company.

 

“Reference Treasury Dealer” means each
of Credit Suisse Securities (USA) LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC and a Primary
Treasury Dealer (as defined below) selected by SMBC Nikko Securities America, Inc. and their respective successors; provided, however,
that if such entity or its successor shall cease to be a primary U.S. Government securities dealer in New York City (a “Primary
Treasury Dealer”), the Company shall substitute therefor another nationally recognized investment banking firm that is a Primary
Treasury Dealer.

 

“Reference Treasury Dealer Quotations”
means, with respect to each Reference Treasury Dealer and any Redemption Date, the average, as determined by the Reference Treasury Dealer,
of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted
in writing to the Quotation Agent by such Reference Treasury Dealer at 3:30 p.m. (New York time) on the third business day preceding
such Redemption Date.

 

     

     

    

 

In the event of redemption of this Note in part only,
a new Note or Notes of this series and of like tenor for the unredeemed portion hereof will be issued in the name of the Holder hereof
upon the cancellation hereof.

 

The Notes of this series will be subject to redemption
at any time at a Redemption Price equal to the principal amount of the Notes, together with accrued and unpaid interest to the Redemption
Date, upon the giving of notice by first-class mail at least 10 days, but not more than 60 days, before the Redemption Date to each Holder
of the Notes to be redeemed, if the Company (or its successor) determines that (1) as a result of (A) any amendment to or change
(including any announced prospective change) in the laws or related regulations of Canada (or the Company’s successor’s jurisdiction
of organization) or of any applicable political subdivision or taxing authority or (B) any amendment to or change in an interpretation
or application of such laws or regulations by any legislative body, court, governmental agency or regulatory authority announced or becoming
effective on or after June 24, 2021, the Company has or will become obligated to pay, on the next Interest Payment Date for the Notes,
additional amounts with respect to any Notes of the series as described above, or (2) on or after June 24, 2021, any action
has been taken by any taxing authority of, or any decision has been rendered by a court in, Canada (or the Company’s successor’s
jurisdiction of organization) or any applicable political subdivision or taxing authority, including any of those actions specified in
(1) above, whether or not the action was taken or decision rendered with respect to the Company, or any change, amendment, application
or interpretation is officially proposed, which, in the opinion of the Company’s counsel, will result in the Company becoming obligated
to pay, on the next Interest Payment Date, additional amounts with respect to any Note of the series, and the Company has determined that
the obligation cannot be avoided by the use of reasonable available measures.

 

The Indenture contains provisions for defeasance
at any time of the entire indebtedness of this Note or certain restrictive covenants and Events of Default with respect to this Note,
in each case upon compliance with certain conditions set forth in the Indenture.

 

If an Event of Default with
respect to Notes of this series shall occur and be continuing, the principal of the Notes of this series may be declared due and payable
in the manner and with the effect provided in the Indenture.

 

The Indenture permits, with certain exceptions as
therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders
of the Notes of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders
of a majority in principal amount of the Notes at the time Outstanding of each series to be affected. The Indenture also contains provisions
permitting the Holders of specified percentages in principal amount of the Notes of each series at the time Outstanding, on behalf of
the Holders of all Notes of such series, to waive compliance by the Company with certain provisions of the Indenture and certain past
defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Note shall be conclusive and binding
upon such Holder and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange
herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

 

     

     

    

 

As provided in and subject to the provisions of the
Indenture, the Holder of this Note shall not have the right to institute any proceeding with respect to the Indenture or for the appointment
of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice
of a continuing Event of Default with respect to the Notes of this series, the Holders of not less than 25% in principal amount of the
Notes of this series at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such
Event of Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee shall not have received from the Holders of
a majority in principal amount of Notes of this series at the time Outstanding a direction inconsistent with such request, and shall have
failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer of indemnity. The foregoing shall
not apply to any suit instituted by the Holder of this Note for the enforcement of any payment of principal hereof or any premium or interest
hereon on or after the respective due dates expressed herein.

 

No reference herein to the Indenture and no provision
of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the
principal of and any premium and interest on this Note at the times, place and rate, and in the coin or currency, herein prescribed.

 

As provided
in the Indenture and subject to certain limitations therein set forth, certain obligations of the Company under the Indenture and this
Note are guaranteed pursuant to guarantees endorsed hereon as provided in the Indenture.  Each Holder, by holding this Note, agrees
to all of the terms and provisions of said guarantees.  The Indenture provides that either guarantor shall be released from its guarantee
upon the occurrence of certain events.

 

As provided in the Indenture and subject to certain
limitations therein set forth, the transfer of this Note is registrable in the Security Register, upon surrender of this Note for registration
of transfer at the office or agency of the Company in any place where the principal of and any premium and interest on this Note are payable,
duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly
executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes of this series and of like
tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

 

The Notes of this series are issuable only in registered
form without coupons in denominations of US$2,000 and integral multiples of US$1,000 thereof. As provided in the Indenture and subject
to certain limitations therein set forth, Notes of this series are exchangeable for a like aggregate principal amount of Notes of this
series and of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

 

No service charge shall be made for any such registration
of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable
in connection therewith.

 

Prior to due presentment of this Note for registration
of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Note is registered
as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Company, the Trustee nor any such agent shall
be affected by notice to the contrary.

 

All terms used in this Note which are not defined
in this Note and are defined in the Indenture shall have the meanings assigned to them in the Indenture.Exhibit 4.4

 

 

ENBRIDGE INC.,

 

SPECTRA ENERGY PARTNERS, LP,

as Guarantor

 

ENBRIDGE ENERGY PARTNERS, L.P.,

as Guarantor

 

 

 

Eighth Supplemental

 

Indenture

 

Dated as of June 28, 2021

 

 

 

(Supplemental to Indenture Dated as of February 25,
2005)

 

 

 

DEUTSCHE BANK TRUST COMPANY AMERICAS,

as Trustee

 

     

     

    

 

EIGHTH SUPPLEMENTAL INDENTURE, dated as of June 28,
2021 (the “Eighth Supplemental Indenture”), between ENBRIDGE INC., a corporation duly organized and existing under
the Companies Ordinance of the Northwest Territories and continued and existing under the Canada Business Corporations Act (herein called
the “Company”), SPECTRA ENERGY PARTNERS, LP, a Delaware limited partnership, as Guarantor (herein called “SEP”),
ENBRIDGE ENERGY PARTNERS, L.P., a Delaware limited partnership, as Guarantor (herein called “EEP” and, together with
 “SEP”, the “Guarantors”) and DEUTSCHE BANK TRUST COMPANY AMERICAS, a banking corporation duly organized
and existing under the laws of the State of New York, as Trustee (herein called “Trustee”);

 

R E C I T A L S:

 

WHEREAS, the Company has heretofore executed and
delivered to DEUTSCHE BANK TRUST COMPANY AMERICAS, as Trustee, an Indenture, dated as of February 25, 2005, as amended and supplemented
by the First Supplemental, dated as of March 1, 2012 and the Sixth Supplemental Indenture, dated as of May 13, 2019 (the “Sixth
Supplemental Indenture”) (as the same may be further amended or supplemented from time to time, including by this Eighth Supplemental
Indenture, the “Indenture”);

 

WHEREAS, Section 901(5) of the Indenture
permits the Company and the Trustee to enter into an indenture supplemental to the Indenture to add to, change or eliminate any of the
provisions in the Indenture in respect of one or more series of Securities, provided that any such addition, change or elimination
(A) shall neither (i) apply to any Security of any series created prior to the execution of such supplemental indenture and
entitled to the benefit of such provision nor (ii) modify the rights of the Holder of any such Security with respect to such provision
or (B) shall become effective only when there is no such Security Outstanding;

 

WHEREAS, the Company, the Guarantors and the Trustee
wish to amend the Indenture, for purposes of each series of Securities created subsequent to the date of this Eighth Supplemental Indenture,
to provide for the execution and authentication of Securities in electronic format and the appointment of Enbridge (U.S.) Inc. as the
Company’s authorized agent upon whom process may be served;

 

WHEREAS, the changes contemplated in this Eighth
Supplemental Indenture comply with the requirements of Section 901(5) of the Indenture;

 

WHEREAS, all things necessary to make this Eighth
Supplemental Indenture a valid agreement according to its terms have been done;

 

NOW, THEREFORE, THIS EIGHTH SUPPLEMENTAL INDENTURE
WITNESSETH:

 

The Company and the Guarantors covenant and agree
with the Trustee as follows:

 

ARTICLE One

 

PROVISIONS OF GENERAL APPLICATION

 

Section 1.1     Relation
to Indenture as Originally Executed

 

This Eighth Supplemental Indenture constitutes
a part of the Indenture in respect of Securities issued on or after the date hereof, including additional Securities issued under an existing
series, but shall not modify, amend or otherwise affect the Indenture insofar as it relates to any other Securities, including any existing
Securities issued under an existing series.

 

     

     

    

 

Section 1.2     Modification
of the Indenture

 

		(a)	Section 101 of the Indenture is hereby amended to (i) delete the period at the end of clause (6), (ii) move the word
 “and” at the end of clause (5) to the end of clause (6) and (iii) insert the following clause (7):

 

All references to “execution”,
 “signed”, “signature”, “attestation” or “authentication” and words of like import shall
be deemed to include signatures that are made or transmitted by images of manually executed signatures transmitted by facsimile, email
or other electronic format (including, without limitation, “pdf,” “tif” or “jpg”) and other electronic
signatures (including without limitation DocuSign and AdobeSign or any other similar platform identified by the Company and reasonably
available at no undue burden or expense to the Trustee).

 

		(b)	Section 112(b) of the Indenture is hereby amended to delete and replace the second full paragraph with the following paragraph:

 

As long as any of the Securities remain
outstanding, the Company will at all times have an authorized agent in the United States upon whom process may be served in any legal
action or proceeding arising out of or relating to the Indenture or any Security. Service of process upon such agent and written notice
of such service mailed or delivered to the Company shall to the extent permitted by law be deemed in every respect effective service of
process upon the Company in any such legal action or proceeding. The Company hereby appoints Enbridge (U.S.) Inc. as its agent for such
purpose, and covenants and agrees that service of process in any such legal action or proceeding may be made upon it at the office of
such agent at 5400 Westheimer Court, Houston, Texas 77056 (or at such other address in the United States, as the Company may designate
by written notice to the Trustee); provided that the Company may replace Enbridge (U.S.) Inc. with any other agent located in the United
States pursuant to an Officers’ Certificate or an indenture supplemental hereto; provided further that nothing in this Section 112(b) shall
affect the appointment of any agent of service of process with respect to any Securities issued prior to the date of the Eighth Supplemental
Indenture.

 

		(c)	Section 202 of the Indenture is hereby amended to delete and replace the second to last full paragraph with the following paragraph:

 

Unless the certificate of authentication
hereon has been executed by the Trustee referred to on the reverse hereof by manual or electronic signature, this Security shall not be
entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

 

		(d)	Section 303 of the Indenture is hereby amended to:

 

		(i)	delete and replace the first and second full paragraphs with the following paragraphs:

 

The Securities shall be executed on
behalf of the Company by any two of its officers having the title of President & Chief Executive Officer, Vice President (including
any Executive, Group or other Vice President) or Corporate Secretary. The signature of any of these officers on the Securities may be
manual, facsimile or electronic.

 

    	 	2	 

     

    

 

Securities bearing the manual, facsimile
or electronic signatures of individuals who were at any time the proper officers of the Company shall bind the Company, notwithstanding
that such individuals or any of them have ceased to hold such offices prior to the authentication and delivery of such Securities or did
not hold such offices at the date of such Securities.

 

		(ii)	delete and replace the last full paragraph with the following paragraph:

 

No Security shall be entitled to any
benefit under this Indenture or be valid or obligatory for any purpose unless there appears on such Security a certificate of authentication
substantially in the form provided for herein executed by the Trustee by manual or electronic signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security has been duly authenticated and delivered hereunder and
is entitled to the benefits of this Indenture. Notwithstanding the foregoing, if any Security shall have been authenticated and delivered
hereunder but never issued and sold by the Company, and the Company shall deliver such Security to the Trustee for cancellation as provided
in Section 309, for all purposes of this Indenture such Security shall be deemed never to have been authenticated and delivered hereunder
and shall never be entitled to the benefits of this Indenture.

 

		(e)	Section 1409 of the Indenture is hereby amended to delete and replace the second and third full paragraphs with the following
paragraphs:

 

The Guarantees shall be executed on
behalf of each respective Guarantor by any authorized person of the Guarantor. The signature of any such authorized person on the Guarantee
may be manual, facsimile or electronic.

 

A Guarantee bearing the manual, facsimile
or electronic signatures of individuals who were at any time the proper authorized persons of a Guarantor shall bind such Guarantor, notwithstanding
that such individuals or any of them have ceased to hold such offices prior to the authentication and delivery of the Security on which
such Guarantee is endorsed or did not hold such offices at the date of such Guarantee.

 

		(f)	Exhibit A to the Indenture, as originally set forth in the Sixth Supplemental Indenture, is hereby amended to delete (i) the
signature block of Enbridge Inc. and (ii) each of the attestation signature blocks contained on the last page thereto.

 

ARTICLE Two

 

MISCELLANEOUS

 

Section 2.1     Relationship
to Indenture

 

The Eighth Supplemental Indenture is a supplemental
indenture within the meaning of the Indenture. The Indenture, as supplemented and amended by this Eighth Supplemental Indenture, is in
all respects ratified, confirmed and approved and, as supplemented and amended by this Eighth Supplemental Indenture, shall be read, taken
and construed as one and the same instrument.

 

    	 	3	 

     

    

 

Section 2.2     Modification
of the Indenture

 

Except as expressly modified by this Eighth Supplemental
Indenture, the provisions of the Indenture shall continue to apply to each Security issued thereunder.

 

Section 2.3     Governing
Law

 

This instrument shall be governed by and construed
in accordance with the law of the State of New York.

 

Section 2.4     Counterparts

 

This instrument may be executed in any number of
counterparts, each of which when so executed shall be deemed to be an original, but all such counterparts shall together constitute but
one and the same instrument.

 

Section 2.5     Trustee
Makes No Representation

 

The recitals contained herein are made by the Company
and the Guarantors and not by the Trustee, and the Trustee assumes no responsibility for the correctness thereof. The Trustee makes no
representation as to the validity or sufficiency of this Eighth Supplemental Indenture.

 

    	 	4	 

     

    

 

IN WITNESS WHEREOF, the parties hereto have caused
this Eighth Supplemental Indenture to be duly executed all as of the day and year first above written.

 

	 	ENBRIDGE INC.
	 	 
	 	By:	/s/ Maximilian G. Chan
	 	 	Name:	Maximilian G. Chan
	 	 	Title:	Vice President, Treasury & Enterprise Risk

 

	 	By:	/s/ Karen K.L. Uehara
	 	 	Name:	Karen K.L. Uehara
	 	 	Title:	Vice President & Corporate Secretary

 

	 	SPECTRA ENERGY PARTNERS, LP, 
	 	By Spectra Energy Partners (DE) GP, LP, its General Partner, 
	 	By Spectra Energy Partners GP, LLC, its General Partner
	 	 
	 	By:	s/ Kelly Gray
	 	 	Name:	Kelly Gray
	 	 	Title:	Corporate Secretary
	 	 
	 	ENBRIDGE ENERGY PARTNERS, L.P.,
	 	 By Enbridge Energy Company, Inc., its General Partner 
	 	 
	 	By:	/s/ Kelly Gray
	 	 	Name:	Kelly Gray
	 	 	Title:	Corporate Secretary

 

[Signature
Page to Eighth Supplemental Indenture]

 

     

     

    

 

	 	DEUTSCHE BANK TRUST COMPANY AMERICAS,
	 	as Trustee
	 	 
	 	By:	/s/ Michael Russell
	 	 	Name:	Michael Russell
	 	 	Title:	Associate

 

	 	 
	 	By:	/s/ Luke Russell
	 	 	Name:	Luke Russell
	 	 	Title:	Vice President

 

[Signature
Page to Eighth Supplemental Indenture]

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