EX-4.1



 Exhibit 4.1 

SIXTH SUPPLEMENTAL INDENTURE 

THIS SIXTH SUPPLEMENTAL INDENTURE, dated as of February 10, 2017 (this “Supplemental Indenture”), is between MPLX LP, a
limited partnership duly formed and existing under the laws of the State of Delaware (the “Partnership”), and The Bank of New York Mellon Trust Company, N.A., a national banking association, as trustee (the “Trustee”).

 WITNESSETH 
 WHEREAS,
pursuant to the Indenture, dated as of February 12, 2015, as supplemented by the First Supplemental Indenture, dated as of February 12, 2015, the Second Supplemental Indenture, dated as of December 22, 2015, the Third Supplemental
Indenture, dated as of December 22, 2015, the Fourth Supplemental Indenture, dated as of December 22, 2015, and the Fifth Supplemental Indenture, dated as of December 22, 2015 (as so supplemented, the “Indenture”), in each
case between the Partnership and the Trustee, the Partnership may from time to time issue and sell Debt Securities in one or more series; 

WHEREAS, the Partnership desires to create and authorize a new series of Debt Securities entitled “4.125% Senior Notes due 2027”
(the “Notes”), limited initially to $1,250,000,000 in aggregate principal amount, and to provide the terms and conditions upon which the Notes are to be executed, registered, authenticated, issued and delivered, the Partnership has duly
authorized the execution and delivery of this Supplemental Indenture; 
 WHEREAS, the Notes are a series of Debt Securities and are being
issued under the Indenture, as supplemented by this Supplemental Indenture, and are subject to the terms contained therein and herein; 

WHEREAS, the Notes are to be substantially in the form attached hereto as Exhibit A; and 

WHEREAS, all acts and things necessary to make the Notes, when executed by the Partnership and authenticated and delivered by or on behalf of
the Trustee as provided in the Indenture and this Supplemental Indenture, the valid, binding and legal obligations of the Partnership, and to make this Supplemental Indenture a legal, binding and enforceable agreement, have been done and performed.

 NOW, THEREFORE, in order to declare the terms and conditions upon which the Notes are executed, registered, authenticated, issued and
delivered, and in consideration of the foregoing premises and the purchase of such Notes by the Holders thereof, the Partnership and the Trustee mutually covenant and agree, for the equal and proportionate benefit of the Holders from time to time of
the Notes, as follows: 
 Section 1.    Definitions. Terms used in this Supplemental Indenture and not
defined herein shall have the respective meanings given such terms in the Indenture. 







 Section 2.    Other Definitions. In addition, the following terms
shall have the following meanings with respect to the Notes: 
 “Board Resolution” means a copy of a resolution or
resolutions of the Board of Directors, certified by the Secretary or an Assistant Secretary of the General Partner to be in full force and effect on the date of such certification, and delivered to the Trustee. 

“Consolidated Net Tangible Assets” means the aggregate value of all assets of the Partnership and its Subsidiaries after
deducting therefrom: (i) all current liabilities, excluding all short-term indebtedness and the current portion of long-term indebtedness ; (ii) all investments in unconsolidated subsidiaries and all investments accounted for on the equity
basis ; and (iii) all goodwill patents and trademarks, unamortized debt discounts and other similar intangibles (all determined in conformity with generally accepted accounting principles and calculated on a basis consistent with the
Partnership’s most recent audited consolidated financial statements). 
 “Interest Payment Date,” when used with
respect to any installment of interest on any Debt Security, means the date specified in such Debt Security as the fixed date on which such installment of interest is due and payable. 

“Mortgage” means as the context may require, (i) to mortgage, pledge, encumber or subject to a lien or (ii) a
mortgage, pledge, encumbrance or lien. 
 “Predecessor Security” of any particular Debt Security means every previous Debt
Security evidencing all or a portion of the same debt as that evidenced by such particular Debt Security; and, for the purposes of this definition, any Debt Security authenticated and delivered under Section 2.09 of the Indenture in exchange
for or in lieu of a mutilated, destroyed, lost or stolen Debt Security shall be deemed to evidence the same debt as the mutilated, destroyed, lost or stolen Debt Security. 

“Regular Record Date” for the interest payable on any Interest Payment Date on the Debt Securities means the date specified
for that purpose as contemplated by Section 2.03 of the Indenture. 
 “Special Record Date” for the payment of any
Defaulted Interest means a date fixed by the Trustee pursuant to Section 2.17 of the Indenture. 

Section 3.    Creation and Authorization of Series. 

(a)    There is hereby created and authorized the following new series of Debt Securities to be issued under the Indenture,
to be designated as the “4.125% Senior Notes due 2027.” 
 (b)    The Notes shall be limited initially to
$1,250,000,000 in aggregate principal amount. Notwithstanding the foregoing initial aggregate principal amount, the Partnership may, from time to time, without notice to or consent of the Holders of the Notes, increase the principal amount of the
Notes that may be issued under this 

  
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Supplemental Indenture and issue such increased principal amount (or any portion thereof), in which case any additional Notes so issued will have the same terms and conditions other than the
public offering price, original interest accrual date and initial interest payment date, and the same CUSIP numbers as the applicable series of Notes previously issued, will be fungible with the applicable series of Notes previously issued for U.S.
federal income tax purposes, and will carry the same right to receive accrued and unpaid interest as the Notes previously issued, and such additional notes will form a single series with the Notes of such series previously issued, including, without
limitation, for purposes of waivers, amendments, redemptions and, if any, offers to purchase, and will rank equally and ratably with the Notes of such series previously issued. 

(c)    The date on which the principal is payable on the Notes, unless accelerated pursuant to the Indenture, shall be as
provided in the form of security attached hereto as Exhibit A. 
 (d)    The Notes shall bear interest as
provided in the form of security attached hereto as Exhibit A. The Interest Payment Dates and the Regular Record Dates for the determination of Holders of the Notes to whom such interest is payable shall be as provided in the form of security
attached hereto as Exhibit A. 
 (e)    The Notes shall be redeemable at the option of the Partnership as set
forth in the form of security attached hereto as Exhibit A. 
 (f)    The provisions of Sections 3.04 and
3.05 of the Indenture shall not be applicable to the Notes. 
 (g)    The Notes will be issued only in fully registered
form, without coupons, in denominations provided herein and in the form of security attached hereto as Exhibit A. 

(h)    The Events of Default and covenants specified in the Indenture will apply to the Notes. 

(i)    The defeasance and covenant defeasance provisions of Article XI of the Indenture, including both Sections 11.02 and
11.03 of the Indenture, will apply to the Notes. 
 (j)    The Notes shall be issued in the form of one or more Global
Debt Securities substantially in the form of security attached hereto as Exhibit A. The Partnership initially appoints The Depository Trust Company to act as Depositary with respect to the Notes. Additional provisions applicable to the Notes
issued in the form of a Global Security are set forth in the form of security attached hereto as Exhibit A. 

(k)    The Notes shall be issuable only in denominations of $2,000 and integral multiples of $1,000 in excess thereof.


  
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 (l)    The Trustee will initially act as the Registrar for the Notes and as
the paying agent with respect to the Notes. The Place of Payment will be The Bank of New York Mellon Trust Company, N.A., 101 Barclay Street, New York, New York 10286. 

(m)    Except as otherwise set forth herein and in the Notes, the terms of the Notes shall be as set forth in the
Indenture, including those made part of the Indenture by reference to the TIA. 
 Section 4.    Additional
Covenants. In addition to the covenants set forth in Article IV of the Indenture, the following additional covenants shall apply with respect to the Notes: 

Section 4.10    Mortgage of Certain Property. 

If the Partnership or any Subsidiary of the Partnership shall Mortgage as security for any indebtedness for money borrowed any pipeline,
terminal or other logistics or storage property or asset employed in the transportation, distribution, storage, terminalling, processing or marketing of crude oil, natural gas, condensate or refined products that (i) is located in the United
States and (ii) is determined to be a principal property by the Board of Directors in its discretion, the Partnership will secure, or will cause such Subsidiary to secure, the Notes and all other Debt Securities equally and ratably with all
indebtedness or obligations secured by the Mortgage then being given; provided, however, that this covenant shall not apply in the case of: 
  

	 	(1)	any Mortgage existing on February 12, 2015 (whether or not such Mortgage includes an after-acquired property provision); 

  

	 	(2)	any Mortgage, including a purchase money Mortgage, incurred in connection with the acquisition or construction of any property (for purposes hereof, the creation of any Mortgage within one hundred eighty (180) days
after the acquisition or completion of construction of such property shall be deemed to be incurred in connection with the acquisition of such property), the assumption of any Mortgage previously existing on such acquired property or any Mortgage
existing on the property of any entity when such entity becomes a Subsidiary of the Partnership; 

  

	 	(3)	any Mortgage on such property in favor of the United States of America, any State, or any agency, department, political subdivision or other instrumentality of either, to secure partial, progress, advance or other
payments to the Partnership or any Subsidiary of the Partnership pursuant to the provisions of any contract or any statute; 

  

	 	(4)	any Mortgage on such property in favor of the United States of America, any State, or any agency, department, political subdivision or other instrumentality of either, to secure borrowings by the Partnership or any
Subsidiary of the Partnership for the purchase or construction of the property Mortgaged; 


  
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	 	(5)	any Mortgage on any principal property arising in connection with or to secure all or any part of the cost of the repair, construction, improvement or alteration of such principal property or any portion thereof;


  

	 	(6)	any Mortgage on any movable railway, marine or automotive equipment or office building, any of which is located at or on any such principal property; 


 

	 	(7)	any Mortgage on any equipment or other personal property used in connection with any such principal property; 

  

	 	(8)	any Mortgage on any such principal property arising in connection with the sale of accounts receivable; or 

  

	 	(9)	any Mortgage that is a renewal of or substitution for any Mortgage permitted under any of the preceding clauses. 


Notwithstanding the foregoing restriction contained in this Section 4.10, the Partnership may and may permit its Subsidiaries to incur
liens or grant Mortgages on property covered by the restriction above so long as the net book value of the property so encumbered, together with all property subject to the restriction on sale and leasebacks contained in Section 4.11, does not,
at the time such lien or Mortgage is granted, exceed fifteen percent (15%) of Consolidated Net Tangible Assets. 

Section 4.11    Sale and Leaseback of Certain Properties. 

The Partnership will not, nor will it permit any Subsidiary of the Partnership to, sell or transfer any pipeline, terminal or other logistics
or storage property or asset employed in the transportation, distribution, storage, terminalling, processing or marketing of crude oil, natural gas, condensate or refined products that (i) is located in the United States and (ii) is
determined to be a principal property by the Board of Directors in its discretion, with the intention of taking back a lease of such property; provided, however, this covenant shall not apply if: 

 

	 	(1)	the lease is between the Partnership and a Subsidiary or between Subsidiaries; 

  

	 	(2)	the lease is for a temporary period by the end of which it is intended that the use of such property by the lessee will be discontinued; 


 

	 	(3)	the Partnership or a Subsidiary of the Partnership could, in accordance with Section 4.10, Mortgage such property without equally and ratably securing the Notes and other series of Debt Securities; or


  

	 	(4)	(A)    the Partnership promptly informs the Trustee of such sale, 

  

	 	(B)	the net proceeds of such sale are at least equal to the fair value (as evidenced by a Board Resolution) of such property and 


  
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	 	(C)	the Partnership shall, and in any such case the Partnership covenants that it will, within one hundred and eighty (180) days after such sale, apply an amount equal to the net proceeds of such sale to the retirement
of debt of the Partnership, or of a Subsidiary of the Partnership in the case of property of such Subsidiary, maturing, by its terms more than one (1) year after the date on which it was originally incurred (herein called “funded
debt”); provided that the amount to be applied to the retirement of funded debt of the Partnership or of a Subsidiary of the Partnership shall be reduced by the amount below if, within seventy-five (75) days after such sale, the
Partnership shall deliver to the Trustee an Officer’s Certificate 

  

	 	(i)	stating that on a specified date after such sale the Partnership or a Subsidiary of the Partnership, as the case may be, voluntarily retired a specified principal amount of funded debt, 


 

	 	(ii)	stating that such retirement was not effected by payment at maturity or pursuant to any applicable mandatory sinking fund or prepayment provision (other than provisions requiring retirement of any funded debt of the
Partnership or a Subsidiary of the Partnership, as the case may be, under the circumstances referred to in this Section 4.11), and 

  

	 	(iii)	stating the then optional redemption or prepayment price applicable to the funded debt so retired or, if there is no such price applicable, the amount applied by the Partnership or a Subsidiary of the Partnership, as
the case may be, to the retirement of such funded debt. 

 In the event of such a sale or transfer, the Partnership shall
deliver to the Trustee the Board Resolution referred to in the parenthetical phrase contained in subclause (4)(B) of this Section 4.11 and an Officer’s Certificate setting forth all material facts under this Section 4.11. For the
purposes of this Section 4.11, the term retirement of such funded debt shall include the “in substance defeasance” of such funded debt in accordance with then applicable accounting rules. 

Section 5.    Effect of Supplemental Indenture. The provisions of this Supplemental Indenture are intended to
supplement those of the Indenture as in effect immediately prior to the execution and delivery hereof. The Indenture shall remain in full force and effect except to the extent that the provisions of the Indenture are expressly modified by the terms
of this Supplemental Indenture. 
 Section 6.    Governing Law. This Supplemental Indenture and the Notes
shall be governed by and construed in accordance with the law of the State of New York, 

  
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without giving effect to any principles of conflicts of laws thereunder to the extent the application of the laws of another jurisdiction would be required thereby. 

Section 7.    Trustee Not Responsible for Recitals or Issuance of Notes. The recitals and statements contained
herein shall be taken as statements of the Partnership, and the Trustee assumes no responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of this Supplemental Indenture or of the Notes other than
with respect to the Trustee’s authentication. The Trustee shall not be accountable for the use or application by the Partnership of the Notes or the proceeds thereof. 

Section 8.    Conflict with TIA. If any provision hereof limits, qualifies or conflicts with a provision of
the TIA that is required under the TIA to be a part of and govern this Supplemental Indenture, the latter provision shall control. If any provision of this Supplemental Indenture modifies or excludes any provision of the TIA that may be so modified
or excluded, the latter provision shall be deemed to apply to this Supplemental Indenture as so modified or to be excluded, as the case may be. 

Section 9.    Counterparts. This Supplemental Indenture may be executed in any number of counterparts, each of
which shall be an original; but such counterparts shall together constitute but one and the same instrument. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or electronic (i.e., “pdf” or
“tif”) transmission shall constitute effective execution and delivery of this Supplemental Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or electronic (i.e., “pdf” or
“tif”) transmission shall be deemed to be their original signatures for all purposes of the Supplemental Indenture as to the parties hereto and may be used in lieu of the original. 

[The remainder of this page is left blank intentionally] 

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

			
	MPLX LP 
		
	By	 	MPLX GP LLC, its General Partner
		
	By:	 	 /s/ Peter Gilgen

	Name:	 	Peter Gilgen
	Title:	 	Vice President and Treasurer


 [Signature Page to Sixth Supplemental Indenture] 







 
			
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee
		
	By:	 	 /s/ Lawrence M. Kusch

	Name:	 	Lawrence M. Kusch
	Title:	 	Vice President


 [Signature Page to Sixth Supplemental Indenture} 







 Exhibit A 

MPLX LP 
 4.125% Senior
Notes due 2027 
  

			
	No.	  	
$                    

 
 CUSIP No. 55336VAK6


 UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION
(“DTC”), NEW YORK, NEW YORK, TO THE PARTNERSHIP OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR 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. 
 TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN
WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE
REFERRED TO HEREIN. 
 MPLX LP, a limited partnership duly formed and existing under the laws of the State of Delaware (herein called the
“Partnership,” 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 [●] ($[●]), or
such greater or lesser amount as indicated on the Schedule of Increases or Decreases in the Principal Amount of Securities attached hereto, on March 1, 2027, and to pay interest thereon from February 10, 2017 or from the most recent
Interest Payment Date to which interest has been paid or duly provided for, semi-annually on March 1 and September 1 in each year commencing September 1, 2017, at the rate of 4.125% 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 Debt Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be February 15 or August 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 Security (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 Debt Securities 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 Debt Securities of this series may be listed, and upon such notice as may be required by such exchange all as more fully provided in said Indenture.
If an Interest Payment Date, a Stated Maturity or a Redemption Date with respect to this Security falls on a day that is not a Business Day, the payment will be made on the next Business Day and no interest will accrue for the period from and after
such Interest Payment Date, Stated Maturity or Redemption Date. 
 Payment of the principal of (and premium, if any) and interest on this
Security will be made at the office or agency of the Partnership maintained for that purpose in New York, 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; provided, however, that (1) payments on any Global Security shall be made by electronic (same-day) funds transfer to the Depositary and (2) at the option of the Partnership payment of interest
may be made by check mailed to the address of the Person entitled thereto as such address shall appear in the Debt Security Register or by electronic funds transfer to an account maintained by the Person entitled thereto as specified in the Debt
Security Register, provided that such Person shall have given the Trustee written instructions. 
 Reference is hereby made to the further
provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 

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

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

Dated: 
  

			
	MPLX LP 
		
	By	 	MPLX GP LLC, its General Partner
		
	By:	 	  

	Name:	 	
	Title:	 	
		
	Attest:	 	  










 CERTIFICATE OF AUTHENTICATION 

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

Dated: 
  

			
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee
		
	By:	 	  

		 	Authorized Signatory









 MPLX LP 

4.125% Senior Notes due 2027 

This Security is one of a duly authorized issue of Debt Securities of the Partnership (herein called the “Securities”), issued and
to be issued in one or more series under an Indenture, dated as of February 12, 2015,as amended or supplemented to date, including as supplemented and amended by the Sixth Supplemental Indenture, dated as of February 10, 2017 (herein
called the “Indenture,” which term shall have the meaning assigned to it in such instrument), between the Partnership and The Bank of New York Mellon Trust Company, N.A., as Trustee (herein called the “Trustee,” which term
includes any successor trustee under the Indenture), and reference is hereby made to the Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Partnership, the Trustee and the Holders of
the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face hereof initially limited in aggregate principal amount to $1,250,000,000. 

Prior to December 1, 2026, the Securities are subject to redemption, in whole at any time or in part from time to time, at the election
of the Partnership, at a redemption price equal to the greater of (1) 100% of the principal amount of such Securities to be redeemed or (2) the sum of the present values of the remaining scheduled payments of principal and interest on the
Securities to be redeemed (exclusive of interest accrued to the Redemption Date) discounted to the Redemption Date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the then current Treasury Rate plus 30 basis points, plus, in either case, accrued and unpaid interest on the principal amount being redeemed to, but not including, the Redemption Date. 

On or after December 1, 2026, the Securities are subject to redemption upon, in whole at any time or in part from time to time, at the
election of the Partnership, at a redemption price equal to 100% of the principal amount of such Securities to be redeemed plus accrued and unpaid interest on the principal amount being redeemed to, but not including, the Redemption Date. 

For purposes of the redemption provisions of the Securities, the following terms are applicable: 

“Business Day” means any Monday, Tuesday, Wednesday, Thursday or Friday that is not a day on which banking institutions in New York,
New York or any Place of Payment are authorized or obligated by law, regulation or executive order to close. 
 “Comparable Treasury
Issue” means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term “Remaining Life,” of the Securities to be redeemed 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 such Securities. 







 “Comparable Treasury Price” means, with respect to any Redemption Date, (1) the
average, as determined by the Partnership, of the Reference Treasury Dealer Quotations for such Redemption Date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Partnership obtains fewer than five such
Reference Treasury Dealer Quotations, the average of all such quotations. 
 “Independent Investment Banker” means one of the
Reference Treasury Dealers that the Partnership appoints to act as the Independent Investment Banker from time to time. 
 “Reference
Treasury Dealer” means each of Barclays Capital Inc., Citigroup Global Markets Inc., Wells Fargo Securities LLC, a Primary Treasury Dealer selected by MUFG Securities Americas Inc., and two additional dealers in U.S. Government securities
selected by the Partnership (each of which we refer to as a “Primary Treasury Dealer”) and their respective successors that the Partnership specifies from time to time; provided, however, that if any of them ceases to be a Primary Treasury
Dealer, the Partnership shall substitute therefor another 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 Partnership, 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 Partnership by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third Business Day preceding such Redemption Date. 

“Treasury Rate” means, with respect to any Redemption Date, the rate per year equal to: (1) the yield, under the heading which
represents the average for the immediately preceding week, appearing in the most recently published statistical release designated “H.15 (519)” or any successor publication which is published weekly by the Board of Governors of the Federal
Reserve System and which establishes yields on actively traded United States Treasury securities adjusted to constant maturity under the caption “Treasury Constant Maturities,” for the maturity corresponding to the Comparable Treasury
Issue; provided that, if no maturity is within three months before or after the Remaining Life of the Securities to be redeemed, yields for the two published maturities most closely corresponding to the Comparable Treasury Issue shall be
determined and the Treasury Rate shall be interpolated or extrapolated from such yields on a straight line basis, rounding to the nearest month; or (2) if such release (or any successor release) is not published during the week preceding the
calculation date or does not contain such yields, the rate per year equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, calculated using a price for the Comparable Treasury Issue (expressed as a percentage of its
principal amount) equal to the Comparable Treasury Price for such Redemption Date. The Treasury Rate shall be calculated on the third Business Day preceding the Redemption Date. 

Unless the Partnership defaults in payment of the redemption price, on or after the Redemption Date, interest will cease to accrue on the
Securities or portions thereof called for redemption. 

  
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 In the event of redemption of this Security in part only, a new Security or Securities 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 Indenture contains provisions for defeasance at any time of the entire indebtedness of this Security or of certain restrictive covenants
and Events of Default with respect to this Security, in each case upon compliance with certain conditions set forth in the Indenture. 
 The
Indenture contains provisions permitting the Partnership and the Trustee to modify the Indenture or any supplemental indenture without the consent of the Holders for one or more of the following purposes: (1) to evidence the succession of
another Person to the Partnership; (2) to surrender any right or power conferred by the Indenture, to add to the covenants for the protection of the Holders of the Securities or to add additional defaults or events of default; (3) to cure
any ambiguity, to correct or supplement any provision of the Indenture which may be defective or inconsistent with any other provision of the Indenture, or to make any other provisions with respect to matters or questions arising under the Indenture
as shall not adversely affect the interests of the Holders; (4) to permit qualification of the Indenture or any supplemental indenture under the TIA; (5) to permit or facilitate the issuance of Debt Securities of any series in uncertified
form; (6) to secure any or all Debt Securities; (7) to make any change that does not adversely affect the rights of any Holder; (8) to add to, change or eliminate any of the provisions of the Indenture in respect of one or more Debt
Securities, under certain conditions specified therein; (9) to evidence and provide acceptance of appointment thereunder by a successor or separate Trustee and to add to or change the provisions under the Indenture as necessary; and
(10) to establish the form or terms of Debt Securities of any series as permitted by Sections 2.01 and 2.03 of the Indenture. 
 The
Indenture also permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Partnership and the rights of the Holders of the Securities of each series to be affected under the
Indenture at any time by the Partnership and the Trustee with the consent of the Holders of not less than a majority in aggregate principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains
provisions permitting the Holders of at least a majority in aggregate principal amount of the Securities at the time Outstanding, on behalf of the Holders of all Securities, to waive compliance by the Partnership 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 Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any
Security 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 Security. 

As provided in and subject to the provisions of the Indenture, the Holder of this Security 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


  
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continuing Event of Default with respect to the Securities, the Holders of not less than 25% in aggregate principal amount of the Securities then 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 indemnity, and the Trustee shall not have received from the Holders of a majority in principal amount of the Securities then 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
Security 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 Security or of the Indenture shall alter or impair the obligation of the
Partnership, which is absolute and unconditional, to pay the principal of and any premium and interest on this Security 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, the transfer of this Security is registrable in the Debt
Security Register, upon surrender of this Security for registration of transfer at the office or agency of the Partnership in any place where the principal of and any premium and interest on this Security are payable, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the Partnership and the Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities and of like tenor, of
authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees. 
 The
Securities are issuable only in registered form without coupons in denominations of $2,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, the Securities are
exchangeable for a like aggregate principal amount of Securities 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, subject to any applicable provisions of the Indenture,
the Partnership 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 Security for registration of transfer, the Partnership, the Trustee and any agent of the Partnership or the
Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Partnership, the Trustee nor any such agent shall be affected by notice to the
contrary. 
 All terms used in this Security which are defined in the Indenture shall have the meaning assigned to them in the Indenture.


  
 4 








 FORM OF ASSIGNMENT 

ABBREVIATIONS 
 Customary abbreviations
may be used in the name of a Securityholder or an assignee, such as TEN COM (=tenants in common), TEN ENT (=tenants by the entireties), JT TEN (=joint tenants with rights of survivorship and not as tenants in common), CUST (=custodian), and U/G/M/A
(=Uniform Gift to Minors Act). 
 Additional abbreviations may also be used though not in the above list. 

 

                       
                 
 FOR VALUE RECEIVED, the
undersigned hereby sell(s), 
 assign(s) and transfer(s) unto 
  

                       
                                         
        
 Please insert Social Security or 

other identifying number of assignee 
 PLEASE
PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE 
  

                          
                                      

 

                          
                                      

 

                          
                                      

 

                          
                                      

the within Security and all rights thereunder, hereby irrevocably constituting and appointing
                     attorney to transfer said Security on the books of the Partnership, with full power of substitution in the premises. 

 

	
	Dated:
	
	Notice: This signature to the assignment must correspond with the name as written on the face of the within instrument in every particular, without alteration or enlargement, or any change whatever.









 SCHEDULE OF INCREASES OR DECREASES IN THE PRINCIPAL AMOUNT OF SECURITIES 

The original principal amount of this Security is [●] U.S. Dollars ($[●]). The following increases or decreases in the principal
amount of this Security have been made: 
  

									
	 Date of increase or

decrease
	 	 Amount of decrease

in principal amount
 of this
Security
	 	 Amount of increase

in principal amount
 of this
Security
	  	 Principal amount of

this Security
 following
such
 decrease or increase
	  	 Signature of

authorized
 signatory of
Trustee
 or Depositary