Document:

EX-4.2

 Exhibit 4.2 

EXECUTION VERSION 

FIRST AMENDMENT TO CREDIT AGREEMENT 

This FIRST AMENDMENT TO CREDIT AGREEMENT, dated as of September 9, 2013 (this “Amendment”), is by and among CENTERPOINT
ENERGY HOUSTON ELECTRIC, LLC, a Texas limited liability company (the “Borrower”), the Banks (as hereinafter defined) named on the signature pages hereto and JPMORGAN CHASE BANK, N.A., as administrative agent for the Banks (in such
capacity, the “Administrative Agent”). 
 W I T N E S S E T H: 

WHEREAS, the Borrower, the banks and other financial institutions from time to time parties thereto (collectively, the
“Banks”) and the Administrative Agent are parties to that certain Credit Agreement, dated as of September 9, 2011 (as heretofore amended, supplemented or otherwise modified, the “Credit Agreement”); 

WHEREAS, the Borrower has requested that the Banks agree to amend the Credit Agreement as provided herein, and the Banks and the
Administrative Agent are agreeable to such request upon the terms and subject to the conditions set forth herein. 
 NOW, THEREFORE, for
good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 

SECTION 1. Definitions. Unless otherwise defined in this Amendment, capitalized terms used in this Amendment which are defined in the
Credit Agreement, as amended hereby (the “Amended Credit Agreement”), shall have the meanings assigned to such terms in the Amended Credit Agreement. The interpretive provisions set forth in Section 1.3 of the Credit Agreement
shall apply to this Amendment. 
 SECTION 2. Amendments to the Credit Agreement. Subject to the terms and conditions set forth herein
and in reliance upon the representations and warranties herein contained, the Credit Agreement is hereby amended as follows: 
 (a)
Section 1.1 of the Credit Agreement is hereby amended by inserting the following defined terms in their appropriate alphabetical order: 

“Impacted Interest Period” has the meaning set forth in the definition of “Eurodollar Rate”. 

“Interpolated Rate” means, at any time, for any Impacted Interest Period, the rate per annum (rounded to the
same number of decimal places as the relevant Screen Rate) determined by the Administrative Agent (which determination shall be conclusive and binding absent manifest error) to be equal to the rate that results from interpolating on a linear basis
between: (a) the applicable Screen Rate for the longest period (for which the applicable Screen Rate is available for Dollars) that is shorter than the Impacted Interest Period and (b) the applicable Screen Rate for the shortest period
(for which such Screen Rate is available for Dollars) that exceeds the Impacted Interest Period, in each case, as of 11:00 A. M. London 

 
time, two Business Days prior to the beginning of such Impacted Interest Period; provided that, to the extent the rate referenced in clause (a) above would be the overnight rate but
for the fact that the overnight rate is no longer a Screen Rate, the applicable Screen Rate for purposes of clause (a) above shall be deemed to be the overnight rate for Dollars determined by the Administrative Agent from such service as the
Administrative Agent may select. 
 “Reference Bank” means such bank as may be selected by the
Administrative Agent and is reasonably acceptable to the Borrower. 
 “Reference Bank Rate” means, for any
Interest Period, the arithmetic mean of the rates (rounded upwards to four decimal places) supplied to the Administrative Agent at its request by at least two Reference Banks as of 11:00 A.M. London time, two Business Days prior to the beginning of
such Interest Period as the rate at which the relevant Reference Bank could borrow funds in the London interbank market in Dollars and for such Interest Period, were it to do so by asking for and then accepting interbank offers in reasonable market
size in Dollars and for such Interest Period. 
 “Screen Rate” has the meaning set forth in the definition
of “Eurodollar Rate”. 
 (b) Section 1.1 of the Credit Agreement is hereby amended by replacing the definitions of
“Eurodollar Rate” and “Maturity Date” in their entirety with the following definitions: 

“Eurodollar Rate” means, with respect to any Eurodollar Rate Loan for any applicable Interest Period, the
London interbank offered rate administered by the British Bankers Association (or any other Person that takes over the administration of such rate) for Dollars for a period equal in length to such Interest Period as displayed on pages LIBOR01 or
LIBOR02 of the Reuters screen or, in the event such rate does not appear on either of such Reuters pages, on any successor or substitute page on such screen that displays such rate, or on the appropriate page of such other information service that
publishes such rate as shall be selected by the Administrative Agent from time to time in its reasonable discretion (the “Screen Rate”) as of 11:00 A. M. London time, two Business Days prior to the beginning of such Interest Period;
provided that (x) if any Screen Rate shall be less than zero, such rate shall be deemed to be zero for purposes of this Agreement and (y) if a Screen Rate shall not be available at the applicable time for the applicable Interest
Period (the “Impacted Interest Period”), then the Eurodollar Rate for the Impacted Interest Period shall be the Interpolated Rate; provided that, if any Interpolated Rate shall be less than zero, such rate shall be deemed to
be zero for purposes of this Agreement; each of the foregoing determinations shall be subject to Section 3.5. 

“Maturity Date” means September 9, 2018, subject to the extension thereof with respect to all or part of
the Commitments pursuant to Section 2.7. 

  
 2 

 (c) Each of the definition of “Interest Period” in Section 1.1 of the
Credit Agreement, the Form of Notice of Borrowing attached to the Credit Agreement as Exhibit A and the Form of Notice of Interest Conversion/Continuation attached to the Credit Agreement as Exhibit B is hereby amended to (i) delete the words
“two weeks” therein and (ii) replace such words with the words “one week”. 
 (d) Section 3.5(a) of the
Credit Agreement is hereby amended to (i) delete the words “Sections 3.3(a) and (b) hereof” therein and (ii) replace such words with the words “Sections 3.3(a), (b) and (c) hereof”. 

(e) Section 3.5(b) of the Credit Agreement is hereby amended to (i) insert the parenthetical “(including, without
limitation, by means of an Interpolated Rate or a Reference Bank Rate)” at the end of sub-clause (b)(i), (ii) after giving effect to the modification set forth in Section 2(e)(i) of this Amendment, make the then-existing
clause (b) a new clause (c) and (iii) after giving effect to the modification set forth in Section 2(e)(ii) of this Amendment, add the following new clause (b): 

“(b) If, prior to the first day of any Interest Period for a Borrowing of Eurodollar Rate Loans, the Administrative Agent
is unable to obtain a quotation for the Eurodollar Rate as contemplated by the definitions of “Eurodollar Rate” and “Interpolated Rate”, then the applicable Eurodollar Rate shall be the Reference Bank Rate for such Interest
Period for such Eurodollar Rate Loan; provided that if any Reference Bank Rate shall be less than zero, such rate shall be deemed to be zero for purposes of this Agreement.” 

SECTION 3. Representations and Warranties. To induce the other parties hereto to enter into this Amendment, the Borrower represents and
warrants that, as of the date hereof: 
 (a) both immediately before and after giving effect to this Amendment, all representations and
warranties of the Borrower contained in Section 6.1 of the Credit Agreement and in the other Loan Documents are true and correct in all material respects (except to the extent that any representation or warranty is qualified by materiality in
the text thereof, in which case such representation or warranty is true and correct in all respects), except for those representations or warranties or parts thereof that, by their terms, expressly relate solely to a specific date, in which case
such representations and warranties are true and correct in all material respects as of such specific date; 
 (b) both immediately before
and after giving effect to this Amendment, no Default or Event of Default exists or is continuing; 
 (c) the execution, delivery and
performance by the Borrower of this Amendment are within the Borrower’s limited liability company powers and have been duly authorized by all necessary limited liability company action; and 

(d) this Amendment has been duly executed and delivered by the Borrower and constitutes a legal, valid and binding obligation of the Borrower,
enforceable in accordance with its terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium or other laws affecting creditors’ rights generally and subject to general principles of equity, regardless of whether considered
in a proceeding in equity or at law. 

  
 3 

 SECTION 4. Conditions to Effectiveness. This Amendment shall become effective as of the
date first written above (the “Amendment Effective Date”) when, and only when, each of the following conditions is satisfied (or waived in accordance with Section 10.1 of the Credit Agreement): 

(a) the Administrative Agent shall have received counterparts of this Amendment fully executed and delivered by the Borrower and each Bank; and

 (b) the Administrative Agent shall have received all fees required to be paid (including, without limitation, and to the extent necessary,
(i) all accrued and unpaid Commitment Fees and (ii) the fees set forth in that certain Fee Letter, dated as of July 25, 2013, by and among CenterPoint Energy, Inc., the Administrative Agent, J.P. Morgan Securities LLC, Citibank, N.A.
and Citigroup Global Markets Inc.), and all reasonable out-of-pocket expenses required to be paid by the Borrower to the Administrative Agent under Section 10.5 of the Credit Agreement for which reasonably detailed invoices have been presented
to the Borrower on or before the date that is one Business Day prior to the date hereof. 
 SECTION 5. Governing Law. THIS AMENDMENT
AND THE OTHER LOAN DOCUMENTS SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

SECTION 6. Counterparts. This Amendment may be executed in any number of counterparts (or counterpart signature pages), each of which
counterparts shall be an original but all of which together shall constitute one instrument. Delivery of an executed signature page of this Amendment by facsimile transmission or other electronic transmission shall be as effective as delivery of a
manually executed counterpart hereof. The execution and delivery of this Amendment by any Bank shall be binding upon each of its successors and assigns (including Transferees of its Commitments and Loans, in whole or in part, prior to the
effectiveness hereof) and binding in respect of all of its Commitments and Loans, including any acquired subsequent to its execution and delivery of this Amendment and prior to the effectiveness hereof. 

SECTION 7. Effect of Amendment. From and after the effectiveness of this Amendment, each reference to “hereof”,
“hereunder”, “herein” and “hereby” and each other similar reference and each reference to “this Agreement” and each other similar reference contained in the Credit Agreement shall refer to the Amended Credit
Agreement. Except as expressly set forth herein, this Amendment shall not by implication or otherwise limit, impair, constitute a waiver of or otherwise affect the rights and remedies of the Administrative Agent or the Banks under the Credit
Agreement or under any other Loan Document, and shall not alter, modify, amend or in any way affect any of the terms, conditions, obligations, covenants or agreements contained in the Credit Agreement or any other Loan Document, all of which are
ratified and affirmed in all respects and shall continue in full force and effect. This Amendment shall constitute a Loan Document for all purposes of the Credit Agreement and the other Loan Documents. 

SECTION 8. Headings. Section and subsection headings in this Amendment are for convenience of reference only, and are not part of, and
are not to be taken into consideration in interpreting, this Amendment. 

  
 4 

 SECTION 9. Entire Agreement. This Amendment and the other Loan Documents represent the
agreement of the Borrower, the Administrative Agent and the Banks with respect to the subject matter hereof, and there are no promises, undertakings, representations or warranties by the Administrative Agent or any Bank relative to the subject
matter hereof not expressly set forth or referred to herein or in the other Loan Documents. 
 [Remainder of Page Intentionally
Left Blank; Signature Pages Follow] 

  
 5 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the
date first above written. 
  

			
	CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC,
	as the Borrower
		
	By:	 	 /s/ Marc Kilbride

	Name:	 	Marc Kilbride
	Title:	 	Vice President and Treasurer

 First Amendment to Credit Agreement 

(CEHE) 

 
			
	JPMORGAN CHASE BANK, N.A.,
	as Administrative Agent and as a Bank
		
	By:	 	 /s/ Bridget Killackey

	Name:	 	Bridget Killackey
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	BANK OF AMERICA, N.A.,
	as a Bank
		
	By:	 	 /s/ William A. Merritt, III

	Name:	 	William A. Merritt, III
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	THE ROYAL BANK OF SCOTLAND PLC,
	as a Bank
		
	By:	 	 /s/ Emily Freedman

	Name:	 	Emily Freedman
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	BARCLAYS BANK PLC,
	as a Bank
		
	By:	 	 /s/ Sreedhar R. Kona

	Name:	 	Sreedhar R. Kona
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	CITIBANK, N.A.,
	as a Bank
		
	By:	 	 /s/ Maureen P. Maroney

	Name:	 	Maureen P. Maroney
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	 DEUTSCHE BANK AG NEW YORK BRANCH,

as a Bank

		
	By:	 	 /s/ Philippe Sandmeier

	Name:	 	Philippe Sandmeier
	Title:	 	Managing Director
		
	By:	 	 /s/ Ming K Chu

	Name:	 	Ming K Chu
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	WELLS FARGO BANK, NATIONAL ASSOCIATION, as a Bank
		
	By:	 	 /s/ Nick Brokke

	Name:	 	Nick Brokke
	Title:	 	Assistant Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	 ROYAL BANK OF CANADA,
 as a
Bank

		
	By:	 	 /s/ Frank Lambrinos

	Name:	 	Frank Lambrinos
	Title:	 	Authorized Signatory

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	SUNTRUST BANK,
	as a Bank
		
	By:	 	 /s/ Andrew Johnson

	Name:	 	Andrew Johnson
	Title:	 	Director

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	 THE BANK OF TOKYO-MITSUBISHI UFJ, LTD.,

as a Bank

		
	By:	 	 /s/ Robert J. MacFarlane

	Name:	 	Robert J. MacFarlane
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	UBS AG, STAMFORD BRANCH,
	as a Bank
		
	By:	 	 /s/ Joselin Fernandes

	Name:	 	Joselin Fernandes
	Title:	 	Associate Director
		
	By:	 	 /s/ Lana Gifas

	Name:	 	Lana Gifas
	Title:	 	Director

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	 CREDIT SUISSE AG, CAYMAN ISLANDS

BRANCH, as a Bank

		
	By:	 	 /s/ Christopher Day

	Name:	 	Christopher Day
	Title:	 	Authorized Signatory
		
	By:	 	 /s/ Michael Spaight

	Name:	 	Michael Spaight
	Title:	 	Authorized Signatory

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	GOLDMAN SACHS BANK USA,
	as a Bank
		
	By:	 	 /s/ Mark Walton

	Name:	 	Mark Walton
	Title:	 	Authorized Signatory

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	MIZUHO BANK (USA),
	as a Bank
		
	By:	 	 /s/ Leon Mo

	Name:	 	Leon Mo
	Title:	 	Senior Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	MORGAN STANLEY BANK, N.A.,
	as a Bank
		
	By:	 	 /s/ Kelly Chin

	Name:	 	Kelly Chin
	Title:	 	Authorized Signatory

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	U.S. BANK NATIONAL ASSOCIATION,
	as a Bank
		
	By:	 	 /s/ James O’Shaughnessy

	Name:	 	James O’Shaughnessy
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	COMERICA BANK,
	as a Bank
		
	By:	 	 /s/ Joey Powell

	Name:	 	Joey Powell
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	PNC BANK, NATIONAL ASSOCIATION,
	as a Bank
		
	By:	 	 /s/ Jon Hinard

	Name:	 	Jon Hinard
	Title:	 	Senior Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE) 

 
			
	THE NORTHERN TRUST COMPANY,
	as a Bank
		
	By:	 	 /s/ Keith L. Burson

	Name:	 	Keith L. Burson
	Title:	 	Vice President

  
 First Amendment to
Credit Agreement 
 (CEHE)EX-4.3

 Exhibit 4.3 

EXECUTION VERSION 

SECOND AMENDMENT TO CREDIT AGREEMENT 

This SECOND AMENDMENT TO CREDIT AGREEMENT, dated as of September 9, 2013 (this “Amendment”), is by and among CENTERPOINT
ENERGY RESOURCES CORP., a Delaware corporation (the “Borrower”), the Banks (as hereinafter defined) named on the signature pages hereto and CITIBANK, N.A., as administrative agent for the Banks (in such capacity, the
“Administrative Agent”). 
 W I T N E S S E T H: 

WHEREAS, the Borrower, the banks and other financial institutions from time to time parties thereto (collectively, the
“Banks”) and the Administrative Agent are parties to that certain Credit Agreement, dated as of September 9, 2011 (as heretofore amended, supplemented or otherwise modified, the “Credit Agreement”); 

WHEREAS, the Borrower has requested that the Banks agree to amend the Credit Agreement as provided herein, and the Banks and the
Administrative Agent are agreeable to such request upon the terms and subject to the conditions set forth herein. 
 NOW, THEREFORE, for
good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows: 

SECTION 1. Definitions. Unless otherwise defined in this Amendment, capitalized terms used in this Amendment which are defined in the
Credit Agreement, as amended hereby (the “Amended Credit Agreement”), shall have the meanings assigned to such terms in the Amended Credit Agreement. The interpretive provisions set forth in Section 1.3 of the Credit Agreement
shall apply to this Amendment. 
 SECTION 2. Amendments to the Credit Agreement. Subject to the terms and conditions set forth herein
and in reliance upon the representations and warranties herein contained, the Credit Agreement is hereby amended as follows: 
 (a)
Section 1.1 of the Credit Agreement is hereby amended by inserting the following defined terms in their appropriate alphabetical order: 

“CERC Subordinated Guaranty of Collection” means that certain Subordinated Guaranty of Collection, dated as of
May 1, 2013, made by the Borrower in favor of Citibank, N.A., as agent, for the ratable benefit of itself and the lenders under the Midstream JV Term Loan Agreement. 

“Impacted Interest Period” has the meaning set forth in the definition of “Eurodollar Rate”. 

“Interpolated Rate” means, at any time, for any Impacted Interest Period, the rate per annum (rounded to the
same number of decimal places as the relevant Screen Rate) determined by the Administrative Agent (which determination shall be conclusive and binding absent manifest error) to be equal to the rate that results from interpolating on a linear basis
between: (a) the applicable Screen Rate for 

 
the longest period (for which the applicable Screen Rate is available for Dollars) that is shorter than the Impacted Interest Period and (b) the applicable Screen Rate for the shortest
period (for which such Screen Rate is available for Dollars) that exceeds the Impacted Interest Period, in each case, as of 11:00 A. M. London time, two Business Days prior to the beginning of such Impacted Interest Period; provided that, to
the extent the rate referenced in clause (a) above would be the overnight rate but for the fact that the overnight rate is no longer a Screen Rate, the applicable Screen Rate for purposes of clause (a) above shall be deemed to be the
overnight rate for Dollars determined by the Administrative Agent from such service as the Administrative Agent may select. 

“Midstream JV Term Loan Agreement” means that certain Term Loan Agreement, dated as of May 1, 2013, by
and among the Midstream JV, the lenders party thereto and Citibank, N.A., as agent. 
 “Midstream JV Term Loan
Indebtedness” means Indebtedness of the Midstream JV incurred under the Midstream JV Term Loan Agreement, and any refinancings, renewals, replacements, refundings or extensions thereof. 

“Reference Bank” means such bank as may be selected by the Administrative Agent and is reasonably acceptable
to the Borrower. 
 “Reference Bank Rate” means, for any Interest Period, the arithmetic mean of the rates
(rounded upwards to four decimal places) supplied to the Administrative Agent at its request by at least two Reference Banks as of 11:00 A.M. London time, two Business Days prior to the beginning of such Interest Period as the rate at which the
relevant Reference Bank could borrow funds in the London interbank market in Dollars and for such Interest Period, were it to do so by asking for and then accepting interbank offers in reasonable market size in Dollars and for such Interest Period.

 “Screen Rate” has the meaning set forth in the definition of “Eurodollar Rate”. 

(b) Section 1.1 of the Credit Agreement is hereby amended by replacing the definitions of “Consolidated Capitalization”,
“Consolidated Indebtedness”, “Consolidated Shareholders’ Equity”, “Eurodollar Rate” and “Maturity Date” in their entirety with the following definitions: 

“Consolidated Capitalization” means, as of any date of determination, the sum of (a) Consolidated
Shareholders’ Equity, (b) Consolidated Indebtedness for Borrowed Money and, without duplication, (c) Mandatory Payment Preferred Stock; provided that, for the purpose of calculating compliance with Section 7.2(a),
Consolidated Capitalization shall be determined excluding any adjustment, non-cash charge to net income or other non-cash charges or writeoffs resulting thereto from the application of SFAS No. 142 and similar provisions of GAAP. 

  
 2 

 “Consolidated Indebtedness” means, as of any date of
determination, the sum of: 
 (i) the total Indebtedness for Borrowed Money of the Borrower and its Consolidated
Subsidiaries as shown on the consolidated balance sheet of the Borrower and its Consolidated Subsidiaries, determined without duplication of any Guarantee of Indebtedness of the Borrower by any of its Consolidated Subsidiaries or of any Guarantee of
Indebtedness of any such Consolidated Subsidiary by the Borrower or any other Consolidated Subsidiary of the Borrower, plus 

(ii) any Mandatory Payment Preferred Stock, less 

(iii) the amount of Indebtedness described in clause (i) attributable to amounts then outstanding under receivables
facilities or arrangements to the extent that such amounts would not have been shown as Indebtedness on a balance sheet prepared in accordance with GAAP prior to January 1, 1997, less 

(iv) the aggregate amount of liabilities constituting Indebtedness for Borrowed Money in respect of any Indexed Debt Security
as shown on the consolidated balance sheet of the Borrower and its Consolidated Subsidiaries, less 
 (v) to the
extent included in clause (i), the aggregate amount of any Guarantees by the Borrower or any of its Consolidated Subsidiaries of any Midstream JV Term Loan Indebtedness (including the Guarantee by the Borrower under the CERC Subordinated Guaranty of
Collection), less 
 (vi) Non-Recourse Debt. 

“Consolidated Shareholders’ Equity” means, as of any date of determination, the total assets of the
Borrower and its Consolidated Subsidiaries, less all liabilities of the Borrower and its Consolidated Subsidiaries. As used in this definition, “liabilities” means all obligations that, in accordance with GAAP consistently applied, would
be classified on a balance sheet as liabilities (including without limitation (to the extent so classified), (a) Indebtedness; (b) deferred liabilities; and (c) Indebtedness of the Borrower or any of its Consolidated Subsidiaries that is expressly
subordinated in right and priority of payment to other liabilities of the Borrower or such Consolidated Subsidiary, but in any case excluding as at such date of determination any Junior Subordinated Debt owned by any issuer of Hybrid Equity
Securities); provided that “liabilities” shall not include any Guarantees by the Borrower or any of its Consolidated Subsidiaries of any Midstream JV Term Loan Indebtedness (including the Guarantee by the Borrower under the CERC
Subordinated Guaranty of Collection). 

  
 3 

 “Eurodollar Rate” means, with respect to any Eurodollar Rate
Loan for any applicable Interest Period, the London interbank offered rate administered by the British Bankers Association (or any other Person that takes over the administration of such rate) for Dollars for a period equal in length to such
Interest Period as displayed on pages LIBOR01 or LIBOR02 of the Reuters screen or, in the event such rate does not appear on either of such Reuters pages, on any successor or substitute page on such screen that displays such rate, or on the
appropriate page of such other information service that publishes such rate as shall be selected by the Administrative Agent from time to time in its reasonable discretion (the “Screen Rate”) as of 11:00 A. M. London time, two
Business Days prior to the beginning of such Interest Period; provided that (x) if any Screen Rate shall be less than zero, such rate shall be deemed to be zero for purposes of this Agreement and (y) if a Screen Rate shall not be
available at the applicable time for the applicable Interest Period (the “Impacted Interest Period”), then the Eurodollar Rate for the Impacted Interest Period shall be the Interpolated Rate; provided that, if any
Interpolated Rate shall be less than zero, such rate shall be deemed to be zero for purposes of this Agreement; each of the foregoing determinations shall be subject to Section 3.5. 

“Maturity Date” means September 9, 2018, subject to the extension thereof with respect to all or part of
the Commitments pursuant to Section 2.7. 
 (c) Each of the definition of “Interest Period” in Section 1.1 of the
Credit Agreement, the Form of Notice of Borrowing attached to the Credit Agreement as Exhibit A and the Form of Notice of Interest Conversion/Continuation attached to the Credit Agreement as Exhibit B is hereby amended to (i) delete the words
“two weeks” therein and (ii) replace such words with the words “one week”. 
 (d) Section 3.5(a) of the
Credit Agreement is hereby amended to (i) delete the words “Sections 3.3(a) and (b) hereof” therein and (ii) replace such words with the words “Sections 3.3(a), (b) and (c) hereof”. 

(e) Section 3.5(b) of the Credit Agreement is hereby amended to (i) insert the parenthetical “(including, without
limitation, by means of an Interpolated Rate or a Reference Bank Rate)” at the end of sub-clause (b)(i), (ii) after giving effect to the modification set forth in Section 2(e)(i) of this Amendment, make the then-existing
clause (b) a new clause (c) and (iii) after giving effect to the modification set forth in Section 2(e)(ii) of this Amendment, add the following new clause (b): 

“(b) If, prior to the first day of any Interest Period for a Borrowing of Eurodollar Rate Loans, the Administrative Agent
is unable to obtain a quotation for the Eurodollar Rate as contemplated by the definitions of “Eurodollar Rate” and “Interpolated Rate”, then the applicable Eurodollar Rate shall be the Reference Bank Rate for such Interest
Period for such Eurodollar Rate Loan; provided that if any Reference Bank Rate shall be less than zero, such rate shall be deemed to be zero for purposes of this Agreement.” 

(f) Schedule 1.1(A) of the Credit Agreement is hereby amended to replace it in its entirety with new Schedule 1.1(A) annexed
hereto as Exhibit A. 

  
 4 

 SECTION 3. Reduction of Total Commitments. The Borrower desires to reduce the Total
Commitments by $350,000,000 as of the Amendment Effective Date (as defined below) upon effectiveness of this Amendment so that, after giving effect to such reduction, the Total Commitments shall equal $600,000,000 (the “Commitment
Reduction”). The parties hereto hereby acknowledge and agree that the Commitment Reduction shall be effective as of the Amendment Effective Date, and each Bank and the Administrative Agent hereby waives the requirements contained in
Section 4.5(b) of the Credit Agreement that the Borrower provide advance written notice to the Administrative Agent of the Commitment Reduction. 

SECTION 4. Representations and Warranties. To induce the other parties hereto to enter into this Amendment, the Borrower represents and
warrants that, as of the date hereof: 
 (a) both immediately before and after giving effect to this Amendment, all representations and
warranties of the Borrower contained in Section 6.1 of the Credit Agreement and in the other Loan Documents are true and correct in all material respects (except to the extent that any representation or warranty is qualified by materiality in
the text thereof, in which case such representation or warranty is true and correct in all respects), except for those representations or warranties or parts thereof that, by their terms, expressly relate solely to a specific date, in which case
such representations and warranties are true and correct in all material respects as of such specific date; 
 (b) both immediately before
and after giving effect to this Amendment, no Default or Event of Default exists or is continuing; 
 (c) the execution, delivery and
performance by the Borrower of this Amendment are within the Borrower’s corporate powers and have been duly authorized by all necessary corporate action; and 

(d) this Amendment has been duly executed and delivered by the Borrower and constitutes a legal, valid and binding obligation of the Borrower,
enforceable in accordance with its terms, subject to applicable bankruptcy, insolvency, reorganization, moratorium or other laws affecting creditors’ rights generally and subject to general principles of equity, regardless of whether considered
in a proceeding in equity or at law. 
 SECTION 5. Conditions to Effectiveness. This Amendment shall become effective as of the date
first written above (the “Amendment Effective Date”) when, and only when, each of the following conditions is satisfied (or waived in accordance with Section 10.1 of the Credit Agreement): 

(a) the Administrative Agent shall have received counterparts of this Amendment fully executed and delivered by the Borrower and each Bank; and

 (b) the Administrative Agent shall have received all fees required to be paid (including, without limitation, and to the extent necessary,
(i) all accrued and unpaid Commitment Fees and (ii) the fees set forth in that certain Fee Letter, dated as of July 25, 2013, by and among CenterPoint Energy, Inc., the Administrative Agent, JPMorgan Chase Bank, N.A., J.P. Morgan
Securities LLC and Citigroup Global Markets Inc.), and all reasonable out-of-pocket expenses required to be paid by the Borrower to the Administrative Agent under Section 10.5 of the Credit Agreement for which reasonably detailed invoices have
been presented to the Borrower on or before the date that is one Business Day prior to the date hereof. 

  
 5 

 SECTION 6. Governing Law. THIS AMENDMENT AND THE OTHER LOAN DOCUMENTS SHALL BE GOVERNED
BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 SECTION 7. Counterparts. This Amendment
may be executed in any number of counterparts (or counterpart signature pages), each of which counterparts shall be an original but all of which together shall constitute one instrument. Delivery of an executed signature page of this Amendment by
facsimile transmission or other electronic transmission shall be as effective as delivery of a manually executed counterpart hereof. The execution and delivery of this Amendment by any Bank shall be binding upon each of its successors and assigns
(including Transferees of its Commitments and Loans, in whole or in part, prior to the effectiveness hereof) and binding in respect of all of its Commitments and Loans, including any acquired subsequent to its execution and delivery of this
Amendment and prior to the effectiveness hereof. 
 SECTION 8. Effect of Amendment. From and after the effectiveness of this
Amendment, each reference to “hereof”, “hereunder”, “herein” and “hereby” and each other similar reference and each reference to “this Agreement” and each other similar reference contained in the
Credit Agreement shall refer to the Amended Credit Agreement. Except as expressly set forth herein, this Amendment shall not by implication or otherwise limit, impair, constitute a waiver of or otherwise affect the rights and remedies of the
Administrative Agent or the Banks under the Credit Agreement or under any other Loan Document, and shall not alter, modify, amend or in any way affect any of the terms, conditions, obligations, covenants or agreements contained in the Credit
Agreement or any other Loan Document, all of which are ratified and affirmed in all respects and shall continue in full force and effect. This Amendment shall constitute a Loan Document for all purposes of the Credit Agreement and the other Loan
Documents. 
 SECTION 9. Headings. Section and subsection headings in this Amendment are for convenience of reference only, and are
not part of, and are not to be taken into consideration in interpreting, this Amendment. 
 SECTION 10. Entire Agreement. This
Amendment and the other Loan Documents represent the agreement of the Borrower, the Administrative Agent and the Banks with respect to the subject matter hereof, and there are no promises, undertakings, representations or warranties by the
Administrative Agent or any Bank relative to the subject matter hereof not expressly set forth or referred to herein or in the other Loan Documents. 

[Remainder of Page Intentionally Left Blank; Signature Pages Follow] 

  
 6 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the
date first above written. 
  

			
	 CENTERPOINT ENERGY RESOURCES CORP.,

as the Borrower

		
	By:	 	/s/ Marc Kilbride
	Name:	 	Marc Kilbride
	Title:	 	Vice President and Treasurer

 Second Amendment to Credit Agreement 

(CERC) 

 
			
	 CITIBANK, N.A.,
 as Administrative
Agent and as a Bank

		
	By:	 	/s/ Maureen P. Maroney
	 Name:
	 	Maureen P. Maroney
	 Title:
	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	 BANK OF AMERICA, N.A.,
 as a
Bank

		
	By:	 	/s/ William A. Merritt, III
	Name:	 	William A. Merritt, III
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	 JPMORGAN CHASE BANK, N.A.,
 as a
Bank

		
	By:	 	/s/ Bridget Killackey
	Name:	 	Bridget Killackey
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	 THE ROYAL BANK OF SCOTLAND PLC,
 as
a Bank

		
	By:	 	/s/ Emily Freedman
	Name:	 	Emily Freedman
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	 BARCLAYS BANK PLC,
 as a
Bank

		
	By:	 	/s/ Sreedhar R. Kona
	Name:	 	Sreedhar R. Kona
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	 DEUTSCHE BANK AG NEW YORK BRANCH,

as a Bank

		
	By:	 	/s/ Philippe Sandmeier
	Name:	 	Philippe Sandmeier
	Title:	 	Managing Director
		
	By:	 	/s/ Ming K Chu
	Name:	 	Ming K Chu
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	WELLS FARGO BANK, NATIONAL ASSOCIATION, as a Bank
		
	By:	 	 /s/ Nick Brokke

	Name:	 	Nick Brokke
	Title:	 	Assistant Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	ROYAL BANK OF CANADA,
	as a Bank
		
	By:	 	 /s/ Frank Lambrinos

	Name:	 	Frank Lambrinos
	Title:	 	Authorized Signatory

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	SUNTRUST BANK,
	as a Bank
		
	By:	 	 /s/ Andrew Johnson

	Name:	 	Andrew Johnson
	Title:	 	Director

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	 THE BANK OF TOKYO-MITSUBISHI UFJ, LTD.,

as a Bank

		
	By:	 	 /s/ Robert J. MacFarlane

	Name:	 	Robert J. MacFarlane
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	UBS AG, STAMFORD BRANCH,
	as a Bank
		
	By:	 	 /s/ Joselin Fernandes

	Name:	 	Joselin Fernandes
	Title:	 	Associate Director
		
	By:	 	 /s/ Lana Gifas

	Name:	 	Lana Gifas
	Title:	 	Director

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as a Bank
		
	By:	 	 /s/ Christopher Day

	Name:	 	Christopher Day
	Title:	 	Authorized Signatory
		
	By:	 	 /s/ Michael Spaight

	Name:	 	Michael Spaight
	Title:	 	Authorized Signatory

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	GOLDMAN SACHS BANK USA,
	as a Bank
		
	By:	 	 /s/ Mark Walton

	Name:	 	Mark Walton
	Title:	 	Authorized Signatory

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	MIZUHO BANK (USA),
	as a Bank
		
	By:	 	 /s/ Leon Mo

	Name:	 	Leon Mo
	Title:	 	Senior Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	MORGAN STANLEY BANK, N.A.,
	as a Bank
		
	By:	 	 /s/ Kelly Chin

	Name:	 	Kelly Chin
	Title:	 	Authorized Signatory

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	U.S. BANK NATIONAL ASSOCIATION,
	as a Bank
		
	By:	 	 /s/ James O’Shaughnessy

	Name:	 	James O’Shaughnessy
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	COMERICA BANK,
	as a Bank
		
	By:	 	 /s/ Joey Powell

	Name:	 	Joey Powell
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	PNC BANK, NATIONAL ASSOCIATION,
	as a Bank
		
	By:	 	 /s/ Jon Hinard

	Name:	 	Jon Hinard
	Title:	 	Senior Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 
			
	THE NORTHERN TRUST COMPANY,
	as a Bank
		
	By:	 	 /s/ Keith L. Burson

	Name:	 	Keith L. Burson
	Title:	 	Vice President

  
 Second Amendment to
Credit Agreement 
 (CERC) 

 EXHIBIT A 

SCHEDULE 1.1(A) 
 SCHEDULE
OF COMMITMENTS AND ADDRESSES 
  

					
	 Names and Address of Banks
	  	Commitment	 
	 JPMorgan Chase Bank, N.A.

JPMorgan Loan Services

1111 Fannin Street, 10th Floor

Houston, TX 77002

Attn: Omar Jones

Tel: 713-750-7912

Telecopy: 713-750-2666

omar.e.jones@jpmorgan.com
	  	$	42,122,448.00	  
	 Bank of America, N.A.

100 North Tryon Street; NC1-007-17-18

Charlotte, NC 28255

Attn: Michael Mason

Tel: 980-683-1839

Telecopy: 980-233-7196

Michael.Mason@baml.com
	  	$	42,122,449.00	  
	 The Royal Bank of Scotland plc

600 Washington Boulevard

Stamford, CT 06901

Attn: Javied Basha

Tel: 203-897-4431

Telecopy: 203-873-5019

javied.basha@rbs.com
	  	$	42,122,449.00	  
	 Barclays Bank PLC

c/o Barclays Capital

745 7th Avenue,
26th Floor
 New York, NY 10019

Attn: May Huang

Tel: 212-526-0787

Telecopy: 212-526-5115

May.Huang@barcap.com
	  	$	42,122,449.00	  

					
	 Citibank, N.A.

388 Greenwich Street, 34th Floor

New York, NY 10013

Attn: Amit Vasani

Tel: 212.816.4166

Telecopy: 212.816.8098

amit.vasani@citi.com
	  	$	42,122,449.00	  
	 Deutsche Bank AG New York Branch

c/o Deutsche Bank Securities Inc.

Capital Markets and Treasury Solutions

700 Louisiana Street

Houston, TX 77003

Attn: Shaheed Momin

Tel: 832.239.4632

Telecopy: 832.348.0870

Shaheed.momin@db.com
	  	$	42,122,449.00	  
	 Wells Fargo Bank, National Association

90 S. 7th Street

MAC: N9305-077

Minneapolis, MN 55402

Attn: Scott Bjelde

Tel: 612-667-6126

Telecopy: 612-316-0506

scott.bjelde@wellsfargo.com
	  	$	42,122,449.00	  
	 Royal Bank of Canada

Three World Financial Center

New York, NY 10281

Tel: 212-858-7374

Telecopy: 212-428-6201

frank.lambrinos@rbccm.com
	  	$	36,489,796.00	  
	 SunTrust Bank

303 Peachtree St NE 4th Floor

Atlanta, GA 30308

Tel: 404-658-4692

Telecopy: 404-827-6270

Andrew.johnson@suntrust.com
  

SunTrust Bank

211 Perimeter Pkwy Center

Atlanta, GA 30346

Attn: TinaMarie Edwards

Tel: 770-352-5153

Telecopy: 404-588-4456

Tinamarie.edwards@suntrust.com
	  	$	36,489,796.00	  

					
	 The Bank of Tokyo-Mitsubishi UFJ, Ltd.

New York Branch

1251 Avenue of the Americas, 12th Floor

New York, NY 10020-1104

Attn: Alan Reiter

Tel: 212-782-5649

Telecopy: 212-782-6440

areiter@us.mufg.jp
	  	$	36,489,796.00	  
	 UBS AG, Stamford Branch

677 Washington Blvd.

Stamford, CT 06901

Attn: Loan Servicing

Tel: 203-719-6391

Telecopy: 203-719-3888

SH-OBP@ubs.com
	  	$	36,489,796.00	  
	 Credit Suisse AG, Cayman Islands Branch

Eleven Madison Avenue

New York NY 10010

Attn: Shweta Kharva

Tel: 919-994-4787

Telecopy: 1-866-469-3871

shweta.kharva@credit-suisse.com

18664693871@docs.ldsprod.com
	  	$	24,489,796.00	  
	 Goldman Sachs Bank USA

c/o Goldman, Sachs & Co.

30 Hudson St., 38th Floor

Jersey City, NJ 07302

Attn: Lauren Day

Tel: 212-934-3921

Telecopy: 917-977-3966

gsd.link@gs.com
	  	$	24,489,796.00	  
	 Mizuho Bank (USA)

1251 Avenue of the Americas

New York, NY 10020

Attn: Adam Cohen

Tel: 212-282-3568

Telecopy: 212-282-4488

adam.cohen@mizuhocbus.com
	  	$	24,489,796.00	  

					
	 Morgan Stanley Bank, N.A.

1300 Thames Street Wharf, 4th Floor

Baltimore, MD 21231

Attn: Edward Henley

Tel: 443-637-4326

Telecopy: 718-233-0967

Docs4loans@ms.com
	  	$	24,489,796.00	  
	 U.S. Bank National Association

461 Fifth Avenue, 8th Floor

New York, NY 10017

Attn: J. James Kim

Tel: 917-326-3924

Telecopy: 646-935-4551

jjames.kim@usbank.com
	  	$	24,489,796.00	  
	 Comerica Bank

910 Louisiana St. Ste 410

Houston, TX 77002

Attn: Joey Powell

Tel: 713-220-5527

Telecopy: 713-220-5631

jbpowell@comerica.com
	  	$	12,244,898.00	  
	 PNC Bank, National Association

Three PNC Plaza 225 Fifth Avenue

Pittsburgh, PA 15222

Attn: Robin Bunch

Tel: 412-768-5337

Telecopy: 412-762-6484

ROBIN.BUNCH@PNC.COM
	  	$	12,244,898.00	  
	 The Northern Trust Company

50 S LaSalle, M27

Chicago, IL 60603

Attn: Keith Burson

Tel: 312-444-3099

Telecopy: 312-557-1425

KB101@ntrs.com
	  	$	12,244,898.00	  
		  	  
	  
	 
	 Total:
	  	$	600,000,000.00

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