Document:

EX-4.1

 Exhibit 4.1 

RECORDING REQUESTED BY 
 AND WHEN RECORDED MAIL TO: 

U.S. BANK NATIONAL ASSOCIATION 

633 W. FIFTH STREET, 24th FLOOR 

LOS ANGELES, CA 90071 
 ATTN:
GLOBAL CORPORATE TRUST 
 Index as a UCC Filing and an Indenture 

This is a Security Agreement and a Mortgage of Chattels 

as well as a Mortgage of Real Estate and Other Property 

SEVENTY-SECOND SUPPLEMENTAL INDENTURE 

FROM 
 SAN DIEGO
GAS & ELECTRIC COMPANY 
 TO 

U.S. BANK NATIONAL ASSOCIATION, as Trustee 

**************** 
 Dated as
of March 11, 2022 
  

 THIS SEVENTY-SECOND SUPPLEMENTAL INDENTURE IS A SECURITY 

AGREEMENT AND A MORTGAGE OF CHATTELS AS WELL AS 

A MORTGAGE OF REAL ESTATE AND OTHER PROPERTY 

THIS SEVENTY-SECOND SUPPLEMENTAL INDENTURE, dated as of March 11, 2022, by and between SAN DIEGO GAS & ELECTRIC COMPANY, a
corporation duly organized and existing under and by virtue of the laws of the State of California, having its principal office in that State in the City of San Diego (the “Company”), and U.S. BANK NATIONAL ASSOCIATION, a banking
association duly organized under an act known as the “National Bank Act,” of the United States of America, having a corporate trust office in the City of Los Angeles, State of California, as Trustee (the “Trustee”). 

WHEREAS, the Company executed and delivered a Mortgage and Deed of Trust (the “Original Indenture”), dated July 1, 1940,
to The Bank of California, National Association, as predecessor trustee to Bankers Trust Company of California, National Association, as predecessor trustee to First Trust of California, National Association, (subsequently renamed U.S. Bank Trust
National Association) as predecessor trustee to the Trustee, to secure payment of the principal of and the interest on all bonds of the Company at any time outstanding thereunder according to their tenor and effect, and to provide the terms and
provisions with respect to its First Mortgage Bonds, 3 3/8% Series due July 1, 1970, issued in the aggregate principal amount of $16,000,000 and heretofore retired; and 

WHEREAS, the Company executed and delivered to the then current trustee, a First Supplemental Indenture dated as of December 1, 1946, a
Second Supplemental Indenture dated as of March 1, 1948, a Third Supplemental Indenture dated as of April 1, 1952, a Fourth Supplemental Indenture dated as of April 1, 1954, a Fifth Supplemental Indenture dated as of October 1,
1955, a Sixth Supplemental Indenture dated as of October 1, 1957, a Seventh Supplemental Indenture dated as of October 1, 1960, an Eighth Supplemental Indenture dated as of March 1, 1967, a Tenth Supplemental Indenture dated as of
December 1, 1968, an Eleventh Supplemental Indenture dated as of February 1, 1970, a Twelfth Supplemental Indenture dated as of September 1, 1971, a Thirteenth Supplemental Indenture dated as of January 15, 1974, a Fourteenth
Supplemental Indenture dated as of December 15, 1974, a Fifteenth Supplemental Indenture dated as of May 1, 1975, a Seventeenth Supplemental Indenture dated as of July 15, 1976, an Eighteenth Supplemental Indenture dated as of
March 15, 1977, a Nineteenth Supplemental Indenture dated as of May 1, 1978, a Twentieth Supplemental Indenture dated as of March 15, 1980, a Twenty-First Supplemental Indenture dated as of August 1, 1980, a Twenty-Second
Supplemental Indenture dated as of July 15, 1981, a Twenty-Third Supplemental Indenture dated as of January 15, 1982, a Twenty-Fourth Supplemental Indenture dated as of August 16, 1982, a Twenty-Fifth Supplemental Indenture dated as
of August 16, 1982, a Twenty-Sixth Supplemental Indenture dated as of August 16, 1982, a Twenty-Seventh Supplemental Indenture dated as of June 1, 1983, a Twenty-Eighth Supplemental Indenture dated as of July 15, 1983, a
Twenty-Ninth Supplemental Indenture dated as of September 1, 1983, a Thirty-First Supplemental Indenture dated as of May 1, 1984, a Thirty-Second Supplemental Indenture dated as of December 1, 1984, a Thirty-Third Supplemental
Indenture dated as of September 1, 1985, a Thirty-Fourth Supplemental Indenture dated as of December 1, 1985, a Thirty-Fifth Supplemental Indenture dated as of July 1, 1986, a Thirty-Sixth Supplemental Indenture dated as of
December 1, 1986, a Thirty-Seventh Supplemental Indenture dated as of September 1, 1987, a Thirty-Eighth Supplemental Indenture dated as of April 15, 1990, a Thirty-Ninth Supplemental Indenture dated as of December 1, 1991, a
Fortieth Supplemental Indenture dated as of April 1, 1992, a Forty-First Supplemental Indenture dated as of June 15, 1992, a Forty-Second Supplemental Indenture dated as of September 1, 1992, a Forty-Third Supplemental Indenture dated
as of December 1, 1992, a Forty-Fourth Supplemental Indenture dated as of April 1, 1993, a Forty-Fifth Supplemental Indenture dated as of June 1, 1993, a Forty-Sixth Supplemental Indenture dated as of July 1, 1993, a
Forty-Seventh Supplemental Indenture dated as of June 1, 1995, a Forty-Eighth Supplemental Indenture dated as of June 1, 1995, a Forty-Ninth Supplemental Indenture dated as of June 1, 2004, a Fiftieth Supplemental Indenture dated as
of May 19, 2005, a Fifty-First Supplemental Indenture dated as of November 17, 2005, a Fifty-Second Supplemental Indenture dated as of June 8, 2006, a Fifty-Third Supplemental Indenture dated as of September 1, 2006, a
Fifty-Fourth Supplemental Indenture dated as of September 20, 2007, a Fifty-Fifth Supplemental Indenture dated as of May 14, 2009, a Fifty-Sixth Supplemental Indenture dated as of May 13, 2010, a Fifty-Seventh Supplemental Indenture
dated as of August 26, 2010, a Fifty-Eighth Supplemental Indenture dated as of August 18, 2011, a Fifty-Ninth Supplemental Indenture dated as of October 6, 2011, a Sixtieth Supplemental Indenture dated as of November 17, 2011, a
Sixty-First Supplemental Indenture dated as of March 22, 2012, a Sixty-Second Supplemental Indenture dated as of September 9, 2013, a Sixty-Third 

 
Supplemental Indenture dated as of March 12, 2015, a Sixty-Fourth Supplemental Indenture dated as of March 12, 2015, a Sixty-Fifth Supplemental Indenture dated May 19, 2016, a
Sixty-Sixth Supplemental Indenture dated as of June 8, 2017, a Sixty-Seventh Supplemental Indenture dated as of May 17, 2018, a Sixty-Eighth Supplemental Indenture dated as of May 31, 2019, a Sixty-Ninth Supplemental Indenture dated
as of April 7, 2020, a Seventieth Supplemental Indenture dated as of September 28, 2020 and a Seventy-First Supplemental Indenture dated as of August 13, 2021, whereby, among other things, the Company set forth certain of the
particulars of the Bonds of series designated “First Mortgage Bonds, 2 3/4% Series due December 1, 1981” issued in the aggregate principal amount of $2,800,000, “First Mortgage Bonds, Series C due 1978” issued in the
aggregate principal amount of $10,000,000, “First Mortgage Bonds, Series D due 1982” issued in the aggregate principal amount of $12,000,000, “First Mortgage Bonds, Series E due 1984” issued in the aggregate principal amount of
$17,000,000, “First Mortgage Bonds, Series F due 1985” issued in the aggregate principal amount of $18,000,000, “First Mortgage Bonds, Series G due 1987” issued in the aggregate principal amount of $12,000,000, “First
Mortgage Bonds, Series H due 1990” issued in the aggregate principal amount of $30,000,000, “First Mortgage Bonds, Series I due 1997” issued in the aggregate principal amount of $25,000,000, “First Mortgage Bonds, Series J due
1998” issued in the aggregate principal amount of $35,000,000, “First Mortgage Bonds, Series K due 2000” issued in the aggregate principal amount of $40,000,000, “First Mortgage Boards, Series L due 2001” issued in the
aggregate principal amount of $45,000,000, “First Mortgage Bonds, Series M due 2004” issued in the aggregate principal amount of $75,000,000, “First Mortgage Bonds, Series N due 1979” issued in the aggregate principal amount of
$50,000,000, “First Mortgage Bonds, Series O due 1982” issued in the aggregate principal amount of $40,000,000, “First Mortgage Bonds, Series P due 2006” issued in the aggregate principal amount of $45,000,000, “First
Mortgage Bonds, Series Q due 2007” issued in the aggregate principal amount of $50,000,000, “First Mortgage Bonds, Series R due 2008” issued in the aggregate principal amount of $50,000,000, “First Mortgage Bonds, Series S due
2010” issued in the aggregate principal amount of $50,000,000, “First Mortgage Bonds, Series T due 2010” issued in the aggregate principal amount of $75,000,000, “First Mortgage Bonds, Series
U-1 due 1984, and U-2 due 1994” issued in the aggregate principal amount of $6,567,000 for Series U-1 and $13,268,000 for
Series U-2, “First Mortgage Bonds, Series V due 2011” issued in the aggregate amount of $50,000,000, “First Mortgage Bonds, Series W due 1988” issued in the aggregate principal amount of
$40,000,000, “First Mortgage Bonds, Series X due 1987” issued in the aggregate principal amount of $20,000,000, “First Mortgage Bonds, Series Y due 1987” issued in the aggregate principal amount of $15,000,000, “First
Mortgage Bonds, Series Z, due 2013” issued in the aggregate principal amount of $65,000,000, “First Mortgage Bonds, Series AA, due 2018” issued in the aggregate principal amount of $150,000,000, “First Mortgage Bonds, Series BB,
due 2018” issued in the aggregate principal amount of $150,000,000, “First Mortgage Bonds, Series CC, due 2008” issued in the aggregate principal amount of $53,000,000, “First Mortgage Bonds Series DD, due 2008” issued in
the aggregate principal amount of $27,000,000, “First Mortgage Bonds, Series EE, due 2015” issued in the aggregate principal amount of $100,000,000, “First Mortgage Bonds, Series FF, due 2007” issued in the aggregate principal
amount of $35,000,000, “First Mortgage Bonds, Series GG, due 2021” issued in the aggregate principal amount of $44,250,000, “First Mortgage Bonds, Series HH, due 2021” issued in the aggregate principal amount of $81,350,000,
“First Mortgage Bonds, Series II due 2023” issued in the aggregate principal amount of $25,000,000, “First Mortgage Bonds, Series JJ, due 2015” issued in the aggregate principal amount of $100,000,000, “First Mortgage Bonds,
Series KK, due 2015” issued in the aggregate principal amount of $14,400,000, “First Mortgage Bonds, Series LL, due 2022” issued in the aggregate principal amount of $60,000,000, “First Mortgage Bonds, Series MM due 2002”
issued in the aggregate principal amount of $80,000,000, “First Mortgage Bonds, Series NN” issued in the aggregate principal amount of $118,615,000, “First Mortgage Bonds, Series OO due 2027” issued in the aggregate principal
amount of $250,000,000, “First Mortgage Bonds, Series PP, due 2018” issued in the aggregate principal amount of $70,795,000, “First Mortgage Bonds, Series QQ, due 2018” issued in the aggregate principal amount of $14,915,000,
“First Mortgage Bonds, Series RR, due 2021” issued in the aggregate principal amount of $60,000,000, “First Mortgage Bonds, Series SS, due 2018” issued in the aggregate principal amount of $92,945,000, “First Mortgage Bonds,
Series TT due 2020” issued in the aggregate principal amount of $57,650,000, “First Mortgage Bonds, Series UU due 2020” issued in the aggregate principal amount of $16,700,000, “First Mortgage Bonds, Series VV due 2034”
issued in the aggregate principal amount of $43,615,000, “First Mortgage Bonds, Series WW due 2034” issued in the aggregate principal amount of $40,000,000, “First Mortgage Bonds, Series XX due 2034” issued in the aggregate
principal amount of $35,000,000, “First Mortgage Bonds, Series YY due 2034” issued in the aggregate principal amount of $24,000,000, “First Mortgage Bonds, Series ZZ due 2034” issued in the aggregate principal amount of
$33,650,000, “First Mortgage Bonds, Series AAA due 2039” issued in the aggregate principal amount of $75,000,000, “First Mortgage Bonds, Series BBB due 2035” issued in the aggregate principal amount of $250,000,000, “First
Mortgage Bonds, Series CCC due 2015” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series DDD due 2026” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series
EEE 

  
 2 

 
due 2018” issued in the aggregate principal amount of $161,240,000, “First Mortgage Bonds, Series FFF due 2037” issued in the aggregate principal amount of $250,000,000,
“First Mortgage Bonds, Series GGG due 2039” issued in the aggregate principal amount of $300,000,000, “First Mortgage Bonds, Series HHH due 2040” issued in the aggregate principal amount of $250,000,000, “First Mortgage
Bonds, Series III due 2040” issued in the aggregate principal amount of $500,000,000, “First Mortgage Bonds, Series JJJ due 2021” issued in the aggregate principal amount of $350,000,000, “First Mortgage Bonds, Series LLL due
2041” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series MMM due 2042” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series NNN due 2023” issued in the
aggregate principal amount of $450,000,000, “Floating Rate First Mortgage Bonds, Series OOO due 2017” issued in the aggregate principal amount of $140,000,000, “Amortizing First Mortgage Bonds, Series PPP due 2022” issued in the
aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series QQQ due 2026” issued in the aggregate principal amount of $500,000,000, “First Mortgage Bonds, Series RRR due 2047” issued in the aggregate principal
amount of $400,000,000, “First Mortgage Bonds, Series SSS due 2048” issued in the aggregate principal amount of $400,000,000, “First Mortgage Bonds, Series TTT due 2049” issued in the aggregate principal amount of $400,000,000,
“First Mortgage Bonds, Series UUU due 2050” issued in the aggregate principal amount of $400,000,000, “First Mortgage Bonds, Series VVV due 2030” issued in the aggregate principal amount of $800,000,000 and “Green First
Mortgage Bonds, Series WWW due 2051” issued in the aggregate principal amount of $750,000,000, respectively, all of which First Mortgage Bonds have heretofore been retired or redeemed, except the Series BBB due 2035, the Series DDD due 2026,
the Series FFF due 2037, the Series GGG due 2039, the Series HHH due 2040, the Series III due 2040, the Series LLL due 2041, the Series MMM due 2042, the Series NNN due 2023, the Series QQQ due 2026, the Series RRR due 2047, the Series SSS due 2048,
the Series TTT due 2049, the Series UUU due 2050, the Series VVV due 2030 and the Series WWW due 2051, which are presently issued and outstanding; and 

WHEREAS, certain of the provisions of the Original Indenture have been amended by the aforesaid Second and Tenth Supplemental Indentures, a
Ninth Supplemental Indenture dated as of August 1, 1968 and a Sixteenth Supplemental Indenture dated August 28, 1975; and 

WHEREAS, the Original Indenture and each of said Supplemental Indentures have been recorded in the Official Records of the Recorders of the
Counties of San Diego, Orange, Riverside, and Imperial in the State of California, the Counties of Yuma and Maricopa in the State of Arizona and the County of Clark in the State of Nevada, as follows: 

 

											
	 	  	 	  	 Counties of

	 Document
	  	Official
Records	  	 San Diego
	  	 Orange
	  	 Riverside
	  	 Imperial

	 Original Indenture
	  	Book
Page
Date	  	 1087
 1

Oct. 10, 1940
	  	 1062
 300

Oct. 10, 1940
	  	 1765
 364

July 13, 1955
	  	 1369
 232

Nov. 22, 1974

	 First Supplemental Indenture
	  	Book
Page
Date	  	 2321
 48

Jan. 2, 1947
	  	 1506
 472

Jan. 9, 1947
	  	 1765
 499

July 13, 1955
	  	 1369
 332

Nov. 22, 1974

	 Second Supplemental Indenture
	  	Book
Page
Date	  	 2537
 363

Mar. 16, 1948
	  	 1616
 190

Mar. 15, 1948
	  	 1765
 448

July 13, 1955
	  	 1369
 343

Nov. 22, 1974

	 Third Supplemental Indenture
	  	Book
Page
Date	  	 4424
 535

Apr. 3, 1952
	  	 2311
 116

Apr. 3, 1952
	  	 1765
 475

July 13, 1955
	  	 1369
 370

Nov. 22, 1974

	 Fourth Supplemental Indenture
	  	Book
Page
Date	  	 5193
 217

Apr. 2, 1954
	  	 2701
 153

Apr. 2, 1954
	  	 1765
 336

July 13, 1955
	  	 1369
 409

Nov. 22, 1974

	 Fifth Supplemental Indenture
	  	Book
Page	  	 5893
 291
	  	 3304
 205
	  	 1829
 3
	  	 2369
 456

		  	Date	  	Dec. 5, 1955	  	Dec. 5, 1955	  	Dec. 5, 1955	  	Nov. 22, 1974

  
 3 

											
	 	  	 	  	 Counties of

	 Document
	  	Official
Records	  	 San Diego
	  	 Orange
	  	 Riverside
	  	 Imperial

	 Sixth Supplemental Indenture
	  	Book
 Page
 Date
	  	 6829
 390

Nov. 12, 1957
	  	 4099
 109

Nov. 12, 1957
	  	 2175
 538

Nov. 12, 1957
	  	 1369
 492

Nov. 22, 1974

	 Seventh Supplemental Indenture
	  	Book
 Page
 Date
	  	 1960 Series 1

File No. 202061
 Oct. 10, 1960
	  	 5455
 385

Oct. 10, 1960
	  	 2780
 3

Oct. 10, 1960
	  	 1369
 541

Nov. 22, 1974

	 Eighth Supplemental Indenture
	  	Book
 Page
 Date
	  	 1967 Series 8

File No. 33860
 Mar. 13, 1967
	  	 8197
 129

Mar. 13, 1967
	  	 Endorsement
 No. 20925

Mar. 13, 1967
	  	 1369
 618

Nov. 22, 1974

	 Ninth Supplemental Indenture
	  	Book
 Page
 Doc. No.

Date
	  	 1968 Series 9
 138926

Aug. 14, 1968
	  	 8691
 69

9816
 Aug. 14, 1968
	  	 78781

Aug. 14, 1968
	  	 1369
 694

Nov. 22, 1974

	 Tenth Supplemental Indenture
	  	Book
 Page
 Doc. No.

Date
	  	 1968 Series 9
 215131

Dec. 9, 1968
	  	 8810
 375

Dec. 9, 1968
	  	 Endorsement
 No. 119982

Dec. 9, 1968
	  	 1369
 706

Nov. 22, 1974

	 Eleventh Supplemental Indenture
	  	Book
 Page
 Doc. No.

Date
	  	 1970
 27782

Feb. 16, 1970
	  	 9217
 516

Feb. 16, 1970
	  	 Endorsement
 No. 14780

Feb. 16, 1970
	  	 1369
 725

Nov. 22, 1974

	 Twelfth Supplemental Indenture
	  	Book
 Page
 Date
	  	 File/Page
 No. 212688

Sept. 20, 1971
	  	 9810
 539

Sept. 20, 1971
	  	 Endorsement
 No. 106508

Sept. 20, 1971
	  	 1369
 744

Nov. 22, 1974

	 Thirteenth Supplemental Indenture
	  	Book
 Page
 Date
	  	 File/Page
 No. 74-006878
 Jan. 10, 1974
	  	 11055
 1

Jan. 10, 1974
	  	 Endorsement
 No. 3853

Jan. 10, 1974
	  	 1369
 763

Nov. 22, 1974

	 Fourteenth Supplemental Indenture
	  	Book
 Page
 Date
	  	 File/Page
 No. 74-322156
 Dec. 11, 1974
	  	 11303
 458

Dec. 11, 1974
	  	 Endorsement
 No. 157219

Dec. 11, 1974
	  	 1369
 1689

Dec. 11, 1974

	 Fifteenth Supplemental Indenture
	  	Book
 Page
 Date
	  	 File/Page
 No. 755-108612
 May 7, 1975
	  	 11395
 1879

May 7, 1975
	  	 Instrument
 No. 52617

May 7, 1975
	  	 1374
 809

May 7, 1975

	 Sixteenth Supplemental Indenture
	  	Book
 Page
 Date
	  	 File/Page
 No. 75-235624
 Sept. 2, 1975
	  	 11500
 1620

Sept. 2, 1975
	  	 Instrument
 No. 107732

Sept. 3, 1975
	  	 1378
 952

Sept. 2, 1975

	 Seventeenth Supplemental Indenture
	  	Book
 Page
 Date
	  	 File/Page
 No. 76-224493
 July 16, 1976
	  	 11815
 640

July 16, 1976
	  	 Instrument
 No. 103484

July 16, 1976
	  	 1389
 687

July 16, 1976

	 Eighteenth Supplemental Indenture
	  	Book
 Page
 Date
	  	 File/Page
 No. 77-100483
 Mar. 18, 1977
	  	 12110
 58

Mar. 18, 1977
	  	 Instrument
 No. 45619

Mar. 18, 1977
	  	 1398
 1675

Mar. 18, 1977

	 Nineteenth Supplemental
	  	Book
 Page
	  	 File/Page
 No. 78-194210
	  	 12672
 1803-1822
	  	 Instrument
 No. 94450
	  	 1415

1638

  
 4 

											
	 	  	 	  	 Counties of

	 Document
	  	 Official

Records
	  	 San Diego
	  	 Orange
	  	 Riverside
	  	 Imperial

	 Indenture
	  	Date	  	May 12, 1978	  	May 12, 1978	  	May 12, 1978	  	May 12, 1978
	 Twentieth Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 80-082569
 Mar. 11, 1980
	  	 13530
 722

Mar. 11,1980
	  	 Instrument
 No. 47195

Mar. 11, 1980
	  	 1448
 1221

Mar. 11, 1980

	 Twenty-First Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 80-245100
 Aug. 1, 1980
	  	 1368
 7 349

Aug. 1, 1980
	  	 Instrument
 No. 139349

Aug. 1, 1980
	  	 1455
 1660

Aug. 1, 1980

	 Twenty-Second Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 81-22576
 July 17, 1981
	  	 Instrument
 No. 24605

July 17, 1981
	  	 Instrument
 No. 135815

July 17, 1981
	  	 1472
 508

July 17, 1981

	 Twenty-Third Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 82-02387
 Jan. 27, 1982
	  	 Instrument
 No. 82-031423
 Jan. 27, 1982
	  	 Instrument
 No. 16093

Jan. 27, 1982
	  	 1479
 1714

Jan. 27, 1982

	 Twenty-Fourth Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 82-257258
 Aug. 19, 1982
	  	 File/Page
 No. 82-291894
 Aug. 19, 1982
	  	 File/Page
 No. 82/143370212

Aug. 19, 1982
	  	 1489
 Aug. 19, 1982

	 Twenty-Fifth Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 82-257259
 Aug. 19, 1982
	  	 File/Page
 No. 82-291895
 Aug. 19, 1982
	  	 File/Page
 No. 82-143371
 Aug. 19, 1982
	  	 1489
 236

Aug. 19, 1982

	 Twenty-Sixth Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 82-257260
 Aug. 19, 1982
	  	 File/Page
 No. 82-291896
 Aug. 19, 1982
	  	 File/Page
 No. 82/143372260

Aug. 19, 1982
	  	 1489
 Aug. 19, 1982

	 Twenty-Seventh Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 83-200545
 June 15, 1983
	  	 File/Page
 No. 83-253901
 June 15, 1983
	  	 File/Page
 No. 118670

June 15, 1983
	  	 1503
 743

June 15, 1983

	 Twenty-Eighth Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 83-252396
 July 22, 1983
	  	 File/Page
 No. 83-316224
 July 22, 1983
	  	 File/Page
 No. 147671

July 22, 1983
	  	 1505
 583

July 22, 1983

	 Twenty-Ninth Supplemental Indenture
	  	 Book
 Page

Date
	  	 File/Page
 No. 83-339007
 Sept. 22, 1983
	  	 File/Page
 No. 83-417956
 Sept. 22, 1983
	  	 File/Page
 194083

Sept. 22, 1983
	  	 1508
 1425

Sept. 22, 1983

  

							
	 	  	 	  	Counties of
	 	  	Official
Records	  	Yuma	  	Maricopa
	 Thirtieth Supplemental Indenture Consisting of
	  	Book
 Page
	  	Docket 1352
272-1002	  	File No.
83-399354
				
	 Original and Twenty-Nine Supplemental Indentures thereto
	  	Book
 Page
 Date
	  	Docket 1353
1-264 Sept. 28, 1983
	  	Oct. 3, 1983

  
 5 

															
	 	  	 	  	Counties of
	 Document
	  	Official
Records	  	San Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	 Thirty-First Supplemental Indenture
	  	Book
Page
Date	  	File/Page
84-161897
5/2/84	  	File/Page
84-180870
5/2/84	  	File/Page
92011
5/2/84	  	1520
 1552
4/30/84
	  	Docket
1382
743-761	  	File No.
84-186813
5/2/84
		  		  		  	4/30/84	  		  		  		  	
	Thirty-Second Supplemental Indenture	  	Book
Page
Date	  	File/Page
84-466428
12/14/84	  	File/Page
84-517843
12/14/84	  	File/Page
267452
12/14/84	  	1533
 753
12/14/84
	  	Docket
1413
216-235
12/14/84	  	File No.
84-537706
12/14/84
	Thirty-Third Supplemental Indenture	  	Book
Page
Date	  	File/Page
85-323210
9/4/85	  	File/Page
85-333505
9/4/85	  	File/Page
198810
9/4/85	  	1546
 708 9/4/85
	  	Docket
1450
816
9/4/85	  	File No.
85-418309
9/4/85
	Thirty-Fourth Supplemental Indenture	  	Book
Page
Date	  	File/Page
85-42465
12/2/85	  	File/Page
85-481794
12/2/85	  	File/Page
270136
12/2/85	  	1550
 1573
12/3/85
	  	Docket
1463
215
12/3/85	  	File No.
85-568874
12/2/85
	Thirty-Fifth Supplemental Indenture	  	Book
Page
Date	  	File/Page
86-279922
7/8/86	  	File/Page
86-290957
7/8/86	  	File/Page
158161
7/8/86	  	1562
 549
 7/8/86
	  	Docket
1491
639-657
7/8/86	  	File No.
86-347412
7/8/86
	Thirty-Sixth Supplemental Indenture	  	Book
Page
Date	  	File/Page
86-576027
12/10/86	  	File/Page
86-606666
12/10/86	  	File/Page
314771
12/10/86	  	1571
 240
12/10/86
	  	Docket
1512
5-24
12/10/86	  	File/Page
86-680502
12/10/86
	Thirty-Seventh Supplemental Indenture	  	Book
Page
Date	  	File/Page
87-532270
9/21/87	  	File/Page
87-530266
9/21/87	  	File/Page
273181
9/21/87	  	1588
 844
9/21/87
	  	Docket
1555
844
9/21/87	  	File/Page
87-585903
9/21/87
	Thirty-Eighth Supplemental Indenture	  	Book
Page
Date	  	File/Page
90-217585
4/23/90	  	File/Page
90-212277
4/23/90	  	File/Page
146794
4/23/90	  	1646
 1280
4/23/90
	  	Docket
1686
92-120
4/23/90	  	File/Page
90-176460
4/23/90
	Thirty-Ninth Supplemental Indenture	  	Book
Page
Date	  	File/Page
91-632073
12/09/91	  	File/Page
91-674397
12/09/91	  	File/Page
425578
12/09/91	  	1687
 743
12/09/91
	  	Docket
1771
711-728
12/09/91	  	File/Page
91-0574751
12/09/91
	Fortieth Supplemental Indenture	  	Book
Page
Date	  	File/Page
92-185636
4/1/92	  	File/Page
92-202372
4/1/92	  	File/Page
115201
4/1/92	  	Book/Page
92-06577
4/1/92	  	Docket
1790
954-970
4/1/92	  	File/Page
92-0169646
4/1/92
	Forty-First Supplemental Indenture	  	Book
Page
Date	  	File/Page
92-0363471
6/11/92	  	File/Page
92-393790
6/11/92	  	File/Page
214904
6/11/92	  	Book/Page
92-011833
6/11/92	  	Docket
1804
73-88
6/11/92	  	File/Page
92-0317072
6/11/92
	Forty-Second Supplemental Indenture	  	Book
Page
Date	  	File/Page
92-0650893
10/13/92	  	File/Page
92-692066
10/13/92	  	File/Page
384167
10/13/92	  	Book/Page
92-21988
10/13/92	  	Docket
1824
670-689
10/13/92	  	File/Page
92-0575062
10/13/92
	Forty-Third Supplemental Indenture	  	Book
Page	  	File/Page
92-0788665	  	File/Page
92-845626	  	File/Page
471625	  	Book/Page
92-27082	  	Docket
1834	  	File/Page
92-0700568
		  	Date	  	12/9/92	  	12/10/92	  	12/10/92	  	12/9/92	  	187-206
12/9/92	  	12/9/92

  
 6 

															
	 	  	 	  	Counties of
	 Document
	  	Official
Records	  	San Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	Forty-Fourth Supplemental Indenture	  	Book
Page
Date	  	File/Page
93-0257065
4/27/93	  	File/Page
93-0277892
4/27/93	  	File/Page
153382
4/27/93	  	Book/Page
93-009487
4/27/93	  	Docket
1859 Fee
09300
4/27/93	  	File/Page
93-0246725
4/26/93
	Forty-Fifth Supplemental Indenture	  	Book
Page
Date	  	File/Page
93-0395609
6/23/93	  	File/Page
93-0420127
6/23/93	  	File/Page
239922
6/23/93	  	Book/Page
93-14224
6/23/93	  	Docket
Fee 14413
6/23/93	  	File/Page
93-0403060
6/23/93
	Forty-Sixth Supplemental Indenture	  	Book
Page
Date	  	File/Page
93-0474705
7/26/93	  	File/Page
93-0496100
7/26/93	  	File/Page
288868
7/27/93	  	Book/Page
93-17399
7/27/93	  	Docket
Fee 17163
7/27/93	  	File/Page
93-0487598
7/27/93
	Forty-Seventh Supplemental Indenture	  	Book
Page
Date	  	File/Page
95-0230457
6/01/95	  	File/Page
95-0232951
6/01/95	  	File/Page
175604
6/01/95	  	Book/Page
95-11739
6/01/95	  	Docket
246-264
6/01/95	  	File/Page
95-0313576
6/01/95
	Forty-Eighth Supplemental Indenture	  	Book
Page
Date	  	File/Page
95-0230458
6/01/95	  	File/Page
95-0232952
6/01/95	  	File/Page
175605
6/01/95	  	Book/Page
95-11740
6/01/95	  	Docket
265-284
6/01/95	  	File/Page
95-0313577
6/01/95
	Forty-Ninth Supplemental Indenture	  	Book
Page
Date	  	File/Page
05-00384477
1/14/05	  	File/Page
04-683110
7/28/04	  	File/Page
04-0766976
9/28/04	  	Book/Page
04-021901
7/15/04	  	Docket
04-29663
8/16/04	  	File/Page
04-941699
8/13/04
	Fiftieth Supplemental Indenture	  	Book
Page
Date	  	File/Page
20050441722
5/25/05	  	File/Page
2005000405730
5/26/05	  	File/Page
20050145832
5/25/05	  	Book/Page
019964
5/25/05	  	Docket
200522373
5/25/05	  	File/Page
20050711918
5/27/05
	Fifty-First Supplemental Indenture	  	Book
Page
Date	  	File/Page
20051016267
11/23/05	  	File/Page
2005000945695
11/28/05	  	File/Page
20050981667
11/29/05	  	Book/Page
2006005449
1/30/06	  	Docket
200553032
12/2/05	  	File/Page
20051852692
12/7/05
	Fifty-Second Supplemental Indenture	  	Book
Page
Date	  	File/Page
2006-
0413693
6/12/06	  	File/Page
2006000404447
6/16/06	  	File/Page
2006-
0422620
6/12/06	  	Book/Page
2006-
032418
7/11/06	  	Docket
2006-
23999
6/12/06	  	File/Page
2006-
0802735
6/14/06
	Fifty-Third Supplemental Indenture	  	Book
Page
Date	  	File/Page
2006-
0683713
9/26/06	  	File/Page
2006000643109
9/27/06	  	File/Page
713252
9/27/06	  	Book/Page
06-46145
9/28/06	  	Docket
2006-
39635
9/29/06	  	File/Page
20061310143
10/3/06
	Fifty-Fourth Supplemental Indenture	  	Book
Page
Date	  	File/Page
2007-
0625504
9/25/07	  	File/Page
2007000581227
9/25/07	  	File/Page
2007-
0600369
9/25/07	  	Book/Page
2007-
036497
9/25/07	  	Docket
2007-
33238
9/25/07	  	File/Page
2007-
1062404
9/26/07
	Fifty-Fifth Supplemental Indenture	  	Book
Page
Date	  	File/Page
2009-
0320954
6/12/09	  	File/Page
2009000305886
6/12/09	  	File/Page
2009-
0311041
6/18/09	  	Book/Page
2009-
017587
6/12/09	  	Docket
16744
6/15/09	  	File/Page
20090542104
6/15/09
	Fifty-Sixth Supplemental Indenture	  	Book
Page
Date	  	File/Page
2010-
0252569
5/20/10	  	File/Page
2010000239342
5/21/10	  	File/Page
2010-
0235807
5/21/10	  	Book/Page
2010-
012850
5/21/10	  	Docket
2010-
12687
5/21/10	  	File/Page
20100431348
5/21/10
	Fifty-Seventh Supplemental Indenture	  	Book
Page
Date	  	File/Page
2010-
0490784
9/16/10	  	File/Page
2010000458947
9/16/10	  	File/Page
2010-
0443991
9/16/10	  	Book/Page
2010-
023359
9/16/10	  	Docket
2010-
22669
9/16/10	  	File/Page
20100800415
9/16/10

  
 7 

															
	 	  	 	  	Counties of
	 Document
	  	Official
Records	  	San Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	Fifty-Eighth Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
 2011-0503399

09/28/11
	  	File/Page
 2011000478379
 09/28/11
	  	File/Page
 2011-0432021

09/29/11
	  	Book/Page
 2011-023234

09/28/11
	  	Docket
2011-21920
09/28/11	  	File/Page
 20110802020

09/28/11

  

					
			
	 Document
	  	Official
Records	  	County of Clark
	 Fifty-Ninth Supplemental Indenture

including the Original
 Indenture and fifty-eight prior supplemental indentures thereto
	  	Book
 Page
 Date
	  	File/Page
 201110120001817

10/12/11

  

																	
	 	  	 	  	Counties of
	 Document
	  	Official
Records	  	Clark	  	San
Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	Sixtieth Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
 201112010001775
 12/1/2011
	  	File/Page
 2011-
0643662
12/1/11
	  	File/Page
 2011000611302
12/1/11
	  	File/Page
2011-
0529988
12/1/11	  	Book/Page
2011-
028759
12/1/11	  	Docket
2011-
26889
12/1/11	  	File/Page
20110993917
12/1/11
	Sixty-First Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
 201204100007894/10/12
	  	File/Page
 2012-
0207656
4/10/12
	  	File/Page
 201200200917
4/10/12
	  	File/Page
2012-
0163282
4/10/12	  	Book/Page
2012-
007887
4/10/12	  	Docket
2012-
08966
4/10/12	  	File/Page
20120296804
4/10/12
	Sixty-Second Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
 201309300001532
 9/30/13
	  	File/Page
 2013-
0592759
9/30/13
	  	File/Page
2013000559137
9/30/13	  	File/Page
0466671
9/26/13	  	Book/Page
2013022171
9/26/13	  	Docket
2013-
26910
9/30/13	  	File/Page
20130866250
9/30/13
	Sixty-Third Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
 20150318-
0000267
3/18/2015
	  	File/Page
 2015-
0125062
3/18/2015
	  	File/Page
2015000137709
3/18/15	  	File/Page
2015-
0105656
3/17/2015	  	Book/Page
2015005389
3/20/2015	  	Docket
2015-
06017
3/20/2015	  	File/Page
2015-
0308470
5/01/15
	Sixty-Fourth Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
20150318-
0000268
3/18/2015	  	File/Page
 2015-
0125063
3/18/2015
	  	File/Page
2015000137710
3/18/2015	  	File/Page
2015-
0105657
3/17/2015	  	Book/Page
2015005397
3/20/15	  	Docket
2015-
06018
3/20/2015	  	File/Page
2015-
0308471
5/01/15
	Sixty-Fifth Supplemental Indenture	  	Book
Page
Date	  	File/Page
20160525-
0000179
5/25/2016	  	File/Page
 2016-
0255036
5/25/2016
	  	File/Page
2016000231993
5/24/2016	  	File/Page
2016-
0218234
5/27/2016	  	Book/Page
2016010377
6/1/2016	  	Docket
2016-
12517
5/25/2016	  	File/Page
2016-
0355233
5/24/2016

  
 8 

																	
	 	  	 	  	Counties of
	 Document
	  	Official
Records	  	Clark	  	San
Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	Sixty-Sixth Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
20170612-
0000678
6/12/2017	  	File/Page
2017-
0261951
6/12/2017	  	File/Page
201700023
8610
6/12/2017	  	File/Page
2017-0
233575
6/12/2017	  	Book/Page
2017013517

6/15/2017	  	Docket
2017-
15226
6/14/2017	  	File/Page
2017-
 0429520
6/13/2017

	Sixty-Seventh Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
20180522-
0000994
5/22/2018	  	File/Page
2018- 
0206641
5/22/2018	  	File/Page
201800018
8655
5/23/2018	  	File/Page
2018
-0203756
5/22/2018	  	Book/Page
2018009579

5/29/2018	  	Docket
2018-
 15182
6/12/2018
	  	File/Page
2018-
0390726
5/22/2018
	Sixty-Eighth Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
20190604-
0001990
6/4/2019	  	File/Page
2019-
0213646
6/4/2019	  	File/Page
201900019
2899
6/5/2019	  	File/Page
2019-
0212524
6/13/2019	  	Book/Page
2019009987

6/7/2019	  	Docket
2019-
 14196
6/4/2019
	  	File/Page
2019-
0414851
6/4/2019
	Sixty-Ninth Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
20200416-
0001114
4/16/2020	  	File/Page
2020-
0180371
4/8/2020	  	File/Page
202000016
0646
4/9/2020	  	File/Page
2020-
0218763
5/22/2020	  	Book/Page
2020006709

4/9/2020	  	Docket
2020-
 11190
4/13/2020
	  	File/Page
20200313674
4/13/2020
	Seventieth Supplemental Indenture	  	Book
Page
 Date
	  	File/Page
20200930-
0002895
9/30/2020	  	File/Page
2020-
0585299
9/30/2020	  	File/Page
202000053
5597
9/30/2020	  	File/Page
2020-
0464141
9/29/2020	  	Book/Page
2020018059

10/6/2020	  	Docket
2020-
 29556
9/29/2020
	  	File/Page
2020 -
0950240
10/6/2020
	Seventy-First Supplemental Indenture	  	Book
 Page
 Date
	  	File/Page
20210813-
0002066
8/13/2021	  	File/Page
2021-
0595081
8/20/2021	  	File/Page
202100054
1053
8/27/2021	  	File/Page
2021-
0532084
9/7/2021	  	Book/Page
2021021459

8/18/2021	  	Docket
2021-
 30813
8/13/2021
	  	File/Page
20210879215
8/13/2021

 WHEREAS, the Board of Directors of the Company has duly authorized the creation of an additional series of
bonds to be designated “First Mortgage Bonds, Series XXX, due 2032,” as hereinafter set forth in this Seventy-Second Supplemental Indenture, and, contemporaneously with the execution and delivery of this Seventy-Second Supplemental
Indenture, the Company is executing and delivering to the Trustee a Seventy-Third Supplemental Indenture dated as of March 11, 2022 (the “Seventy-Third Supplemental Indenture”) whereby, among other things, the Company has set
forth certain of the particulars of the bonds of another additional series, which are designated “First Mortgage Bonds, Series YYY, due 2052” and are to be issued on the date hereof contemporaneously with the issuance, pursuant to this
Seventy-Second Supplemental Indenture, of First Mortgage Bonds, Series XXX, due 2032; and 
 WHEREAS, the execution and delivery of this
Seventy-Second Supplemental Indenture has been duly authorized by resolution of the Board of Directors of the Company; and 
 WHEREAS, all
the conditions and requirements necessary to make this Seventy-Second Supplemental Indenture a valid, binding and legal instrument in accordance with its terms and for the purposes herein expressed have been performed and fulfilled and the execution
and delivery hereof have been in all respects duly authorized. 
 NOW, THEREFORE, in order further to secure the payment of the principal of
and premium, if any, and interest on all of the bonds of the Company at any time outstanding under the Original Indenture, as heretofore amended and supplemented, as amended and supplemented by this Seventy-Second Supplemental Indenture and the
Seventy-Third Supplemental Indenture and as the same may from time to time be further amended and supplemented (the “Indenture”) and to secure the performance and observance of each and every of the covenants, conditions and
agreements of the Indenture, as from time to time amended and supplemented, and for and in consideration of the premises, and of the sum of One Dollar ($1.00) to the Company duly paid by the Trustee (the receipt whereof is hereby acknowledged), the
Company has executed and delivered this Seventy-Second Supplemental Indenture and has 

  
 9 

 
granted, bargained, sold, warranted, released, conveyed, assigned, transferred, mortgaged, pledged, hypothecated, granted a security interest in, set over and confirmed, and by these presents
does grant, bargain, sell, warrant, release, convey, assign, transfer, mortgage, pledge, hypothecate, grant a security interest in, set over and confirm unto U.S. Bank National Association, as Trustee, and to its respective successors in said trust
forever, with power of sale, all property, real, personal and mixed, now owned or hereafter acquired or to be acquired by the Company, and wheresoever situated (except such property as is expressly excepted or excluded from the lien and security
interest of the Indenture, and property of a successor corporation or corporations excluded from the lien and security interest thereof by the provisions of Section 3 of Article XIV thereof) subject to the rights reserved by the Company in and
by other provisions of the Indenture, including in the property subject and to be subject to the lien and security interest thereof and hereof (without in any manner limiting or impairing by the enumeration of the same the scope and intent of the
foregoing or of any general description contained in the Original Indenture or in this or any other supplemental indenture) all lands, rights-of-way, other land rights,
flowage and other water rights, power houses, dams, reservoirs, docks, roads, and buildings, structures and other land improvements; steam, and other electric generating plants, including buildings and other structures, turbines, generators,
exciters, boilers and other boiler plant equipment, condensing equipment, and all auxiliary equipment; stations and substations; electric transmission and distribution systems, including structures, poles, towers, fixtures, conduits, insulators,
wires, cables, transformers, services and meters; steam heating plants and systems, including mains and equipment; gas plants, transmission and distribution systems, including pipe lines, structures, tanks, mains, compressor stations, purifier
stations, pressure holders, governors, services and meters; communication systems, office, shop and other buildings and structures, and equipment; apparatus and equipment and materials and supplies of all other kinds and descriptions; and all
municipal and other franchises, leaseholds, licenses, permits, and privileges; 
 TOGETHER WITH all and singular the tenements,
hereditaments and appurtenances belonging or in any wise appertaining to the aforesaid property or any part thereof with the reversion and reversions, remainder and remainders, tolls, rents and revenues, issues, income, proceeds, product and profits
thereof, and all the estate, right, title and interest and claim whatsoever, at law as well as in equity, which the Company now has or may hereafter acquire in and to the aforesaid property and franchises and every part and parcel thereof (except
such property as is expressly excepted or excluded from the lien and security interest of the Indenture, and property of a successor corporation or corporations excluded from the lien and security thereof by the provisions of Section 3 of
Article XIV thereof), subject to the rights reserved by the Company in and by other provisions of the Indenture; 
 It is hereby agreed by
the Company that, except as aforesaid, all the property, rights, and franchises acquired by the Company after the date hereof shall be as fully embraced within the lien and security interest hereof as if such property were now owned by the Company
and were specifically described herein and conveyed and a security interest therein granted hereby; 
 SAVING AND EXCEPTING, HOWEVER,
anything to the contrary notwithstanding contained herein or in the granting clauses of the Original Indenture and said Supplemental Indentures (a) such property described or referred to in any of such granting clauses as has been from time to
time, released or sold free from the lien and security interest of the Original Indenture (or the Original Indenture, as supplemented) in accordance and compliance with the provisions thereof (or of the Original Indenture, as supplemented, as the
case may be), and (b) all of the following property (whether now owned by the Company or hereafter acquired by it): (1) all gas, electric energy and steam produced, purchased or otherwise acquired; (2) all contracts, choses in action,
shares of stock, bonds, notes, evidences of indebtedness, and other securities, other than any of the foregoing which may be required to be deposited from time to time with the Trustee in accordance with the provisions of the Indenture or are
required by some express provision thereof to be deposited with the Trustee; (3) merchandise and appliances at any time acquired for the purpose of sale or lease to customers and others and contracts for the sale of merchandise and appliances;
(4) motor vehicles; (5) timber on land owned by the Company; (6) minerals or mineral rights in lands owned by the Company; (7) oil, coal or gas, or oil, coal or gas rights in land owned by the Company or gas wells or oil wells or
equipment therefor or coal mines or equipment therefor; (8) fuel and other personal property which are consumable in their use in the operation of the properties of the Company; (9) bills and accounts receivable; (10) cash on hand and
in banks other than such cash as may be deposited from time to time with the Trustee in accordance with the provisions of the Indenture or as is required by some express provision thereof to be deposited with the Trustee; and (11) the last day
of the term of each leasehold estate now or hereafter enjoyed by the Company. The Company may, however, expressly subject to the lien and security interest and operation of the Original Indenture and all indentures supplemental thereto all or any
part of the property of the character described in clause (b) of this paragraph; 

  
 10 

 TO HAVE AND TO HOLD all said properties, real, personal and mixed, mortgaged, pledged, or
conveyed and in which a security interest has been granted by the Company as aforesaid, or intended so to be, unto the Trustee and its successors and assigns forever, subject, however, to Permitted Liens as defined in the Indenture; 

IN TRUST NEVERTHELESS, for the equal pro rata benefit and security as provided in the Original Indenture and all indentures supplemental
thereto of all and every of the bonds issued and to be issued in accordance with the provisions of the Original Indenture and all indentures supplemental thereto, without preference, priority or distinction as to lien or security interest of any
over the others by reason of priority in time of the issue, negotiation or maturity thereof, subject, however, to the provisions of the Original Indenture and all indentures supplemental thereto relating to any sinking fund or similar fund for the
benefit of the bonds of any particular series; 
 The Company does further covenant and agree with the Trustee as follows: 

ARTICLE I 
 SERIES XXX
BONDS 
 Section 1: There is hereby created, for issuance under the Original Indenture as supplemented by the
said Supplemental Indentures (including this Seventy-Second Supplemental Indenture), a series of bonds designated Series XXX, due 2032, each of which shall bear the descriptive title “First Mortgage Bonds, Series XXX, due 2032” (herein
sometimes referred to as “Series XXX Bonds”), and the form thereof shall contain suitable provisions with respect to the matters hereinafter in this Section specified. The Series XXX Bonds shall mature on March 15, 2032 and
shall be issued in denominations of $1,000 and integral multiples thereof as the Company may from time to time execute and deliver. The Series XXX Bonds shall bear interest at the rate and from the date, shall mature as to principal, and shall be
payable as to principal and premium, if any, and interest at such place or places and in such money, all as provided in the form of Series XXX Bond set forth on Exhibit A hereto (the “Form of Bond”) and by the applicable
provisions of the Indenture. In addition, March 11, 2022 shall be an interest payment date for the Series XXX Bonds for purposes of Section 9 of Article II of the Indenture, provided that no interest shall be payable on such date.
The principal and premium, if any, and interest on the Series XXX Bonds shall be payable at the office or agency maintained by the Company for such purpose (initially the corporate trust office of the Trustee) in the City and County of Los Angeles,
State of California and, if Series XXX Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of this Article I, at the office or agency maintained by the Company for such purpose in
the Borough of Manhattan, City and County of New York, State of New York. The Series XXX Bonds shall be dated as in Section 9 of Article II of the Indenture provided with respect to registered bonds without coupons. 

The Series XXX Bonds shall further be redeemable, exchangeable, transferable and otherwise have the terms set forth in the Form of Bond. 

The Series XXX Bonds shall otherwise be of such terms, provisions, tenor and form as provided in this Seventy-Second Supplemental Indenture.

 Section 2: The Series XXX Bonds shall be executed, authenticated and delivered in accordance with the
provisions and shall be entitled to the protection and security of the Original Indenture, as supplemented by this Seventy-Second Supplemental Indenture and the other supplemental indentures, and shall be subject to all of the terms, conditions and
covenants and limitations thereof. The aggregate principal amount of the Series XXX Bonds, which may be executed by the Company and authenticated and delivered by the Trustee and secured by the Indenture as from time to time in effect, is limited
only to the extent provided in Section 1 of Article II of the Original Indenture. The Company has authorized the issuance and sale on the date hereof of $500,000,000 aggregate principal amount of Series XXX Bonds. The Company may, from time to
time, without notice to or the consent of the registered holders of the Series XXX Bonds but upon and subject to the terms and provisions of the Indenture, increase the principal amount of the Series XXX Bonds under the Indenture and issue such
increased principal amount, or any portion thereof. Any additional Series XXX Bonds so issued shall have the same form and terms (other than offering price, the date of original issuance and, under certain circumstances, the date from which interest
thereon shall begin to accrue and the first Interest Payment Date (as defined below)) as the Series XXX Bonds previously issued and shall form a single series of bonds under the Indenture with the previously issued Series XXX Bonds. 

  
 11 

 Section 3: The Series XXX Bonds shall be issued only as fully
registered bonds without coupons. The fully registered bonds without coupons and the certificate of authentication to be endorsed on all Series XXX Bonds shall be substantially in the form set forth on the Form of Bond. In addition, the Series XXX
Bonds may be issuable in whole or in part in the form of one or more securities that evidence all or part of the bonds of such series and are registered in the name of a depositary (as defined below) or a nominee thereof for such series (each, a
“Global Security”) and, in such case, the Board of Directors of the Company (or an authorized officer designated by the Board of Directors of the Company) shall appoint a clearing agency registered under the Securities Exchange Act
of 1934, as amended (the “Exchange Act”), designated to act as depositary (a “depositary”) for such Global Securities; the initial depositary so appointed is The Depository Trust Company. The definitive Series XXX
Bonds shall be numbered in such manner as the Company shall at any time or from time to time determine. 

Section 4: In the event Series XXX Bonds are issued as Global Securities the following provisions, in addition to
the provisions of the Indenture, shall apply: 
 (1) Each Global Security authenticated under the Indenture shall be registered in the
name of the depositary designated for such Global Security or a nominee thereof and delivered to such depositary or a nominee thereof or custodian therefor, and each such Global Security shall constitute a single Series XXX Bond for all purposes of
this Supplemental Indenture. 
 (2) Notwithstanding any other provision in this Supplemental Indenture, no Global Security may be
exchanged in whole or in part for Series XXX Bonds registered, and no transfer of a Global Security in whole or in part may be registered, in the name of any person other than the depositary for such Global Security or a nominee thereof unless
(A) such depositary has notified the Company that it is unwilling or unable to continue as depositary for the Global Security or Global Securities, as the case may be, representing the Series XXX Bonds and a successor depositary has not been
appointed by the Company within 90 days of receipt by the Company of such notification, (B) if at any time the depositary ceases to be a clearing agency registered under the Exchange Act at a time when the depositary is required to be so
registered to act as such depositary and no successor depositary shall have been appointed by the Company within 90 days after it became aware of the depositary’s ceasing to be so registered, (C) the Company, in its sole discretion,
executes and delivers to the Trustee a written order signed in the name of the Company by its Chairman of the Board, its President or a Vice President, and by its Treasurer, an Assistant Treasurer, its Secretary or an Assistant Secretary to the
effect that the Global Securities of such series shall be exchangeable as described below, or (D) a “completed default” (as defined in the Indenture) has occurred and is continuing with respect to the Series XXX Bonds. If any of the
events described in clauses (A) through (D) of the preceding sentence occur, the beneficial owners of interests in such Global Securities will be entitled to exchange those interests for definitive Series XXX Bonds and, without unnecessary
delay but in any event not later than the earliest date on which those interests may be so exchanged, the Company will prepare and deliver to the Trustee definitive Series XXX Bonds in such form and denominations as are required by or pursuant to
the Indenture, and in an aggregate principal amount equal to the aggregate principal amount of such Global Securities, such bonds to be duly executed by the Company. On or after the earliest date on which such beneficial interests may be so
exchanged, such Global Securities shall be surrendered from time to time by the depositary as shall be specified in the order from the Company with respect thereto (which the Company agrees to deliver) to the Trustee, as the Company’s agent for
such purpose, and in accordance with any instructions given to the Trustee and the depositary by the Company (which instructions shall be in writing but need not be contained in or accompanied by an officers’ certificate or be accompanied by an
opinion of counsel), to be exchanged, in whole or in part, for definitive Series XXX Bonds as described above without charge. The Trustee shall authenticate and make available for delivery, in exchange for each portion of each surrendered Global
Security, a like aggregate principal amount of definitive Series XXX Bonds of authorized denominations as the portion of such Global Security to be exchanged. Promptly following any such exchange in part, such Global Security shall be returned by
the Trustee to such depositary or its custodian. If a definitive Series XXX Bond is issued in exchange for any portion of a Global Security after the close of business at the place where such exchange occurs on or after (i) any regular record
date for a regularly scheduled interest payment date (an “Interest Payment Date”) for such bond and before the opening of business at that place of exchange on such Interest Payment Date, or (ii) any special record date for the
payment of interest for such bond which was not punctually paid or duly provided for on any Interest Payment Date (“Defaulted Interest”) and before the opening of business at such place of exchange on the related proposed date for
the payment of such Defaulted Interest, as the case may be, interest shall not be payable on such Interest Payment Date or proposed date for payment, as the case may be, in respect of such definitive bond, but shall be payable on the Interest
Payment Date or proposed date for payment, as the case may be, only to the person to whom interest in respect of such portion of such Global Security shall be payable in accordance with the provisions of the Indenture and the Series XXX Bonds. 

  
 12 

 (3) Subject to Clause (2) above, any exchange or transfer of a Global Security
for other Series XXX Bonds may be made in whole or in part, and all definitive Series XXX Bonds issued in exchange for or upon transfer of a Global Security or any portion thereof shall be registered in such names as the depositary for such Global
Security shall direct. 
 (4) Every Series XXX Bond authenticated and delivered upon registration of transfer of, or in exchange for
or in lieu of, a Global Security or any portion thereof, shall be authenticated and delivered in the form of, and shall be, a Global Security, unless such bond is registered in the name of a person other than the depositary for such Global Security
or a nominee thereof. 
 (5) Every Global Security authenticated and delivered hereunder shall bear a legend in substantially the
following form: 
 THIS SECURITY 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 SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY 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. ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY OTHER PERSON IS WRONGFUL, INASMUCH AS THE REGISTERED OWNER HEREOF HAS AN INTEREST HEREIN.

 Section 5: The Series XXX Bonds may contain or have imprinted thereon such provisions or specifications not
inconsistent with the Indenture as may be required to comply with the rules of any stock exchange or any federal or state authority or commission, or to comply with usage with respect thereto, and may bear such other appropriate endorsements or
notations as are authorized or permitted by the Indenture. 
 Section 6: In the manner and subject to certain
conditions and limitations specified herein and in the Indenture, Series XXX Bonds may be exchanged without a service charge for a like aggregate principal amount of such Series XXX Bonds of other authorized denomination or denominations; provided
that the Company may require payment of a sum or sums sufficient to reimburse it for any stamp tax or other governmental charge payable in connection therewith. 

Section 7: The Company shall maintain in the City and County of Los Angeles, State of California, and in such other
place or places as the Company may designate at any time or from time to time, an office or agency where Series XXX Bonds, including Series XXX Bonds issued in definitive certificated form, may be presented for payment, registration, transfer and
exchange as provided therein or in the Indenture. Without limitation to the foregoing, if Series XXX Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of this Article I, the
Company shall also maintain in the Borough of Manhattan, City and County of New York, State of New York, an office or agency where Series XXX Bonds, including Series XXX Bonds issued in definitive certificated form, may be presented for payment,
registration, transfer and exchange as provided therein or in the Indenture. Such office or agency in the City and County of Los Angeles, State of California, and any such office or agency in the Borough of Manhattan, City and County of New York,
State of New York, shall be a corporate trust office of the Trustee unless and until the Company shall designate another office or agency by notice in writing delivered to the Trustee. 

Section 8: No transfer or exchange of any Series XXX Bonds pursuant to any of the provisions of this Article I shall
be made except upon and in accordance with all of the applicable terms, provisions and conditions of said bonds and of the Indenture. 

  
 13 

 ARTICLE II 

MISCELLANEOUS PROVISIONS 

Section 1: This instrument is executed and shall be construed as an indenture supplemental to the Original Indenture
and shall form a part thereof and, as supplemented by this Seventy-Second Supplemental Indenture, the Original Indenture as heretofore supplemented and amended is hereby confirmed. 

Section 2: All terms used in this Seventy-Second Supplemental Indenture shall be taken to have meaning as in the
Original Indenture, as heretofore supplemented and amended, except terms which may be otherwise expressly defined herein and in cases where the context clearly indicates otherwise. 

Section 3: In order to facilitate the filing of this Seventy-Second Supplemental Indenture, the same may be executed
in several counterparts, each of which, when so executed, shall be deemed to be an original, but such counterparts shall constitute but one and the same instrument. 

Section 4: All of the covenants, stipulations, promises and agreements in this Seventy-Second Supplemental Indenture
by or on behalf of the Company shall bind its successors and assigns, whether so expressed or not. 
 Section 5:
To the extent any provision in this Seventy-Second Supplemental Indenture conflicts with any provision in the Indenture, the provisions of this Seventy-Second Supplemental Indenture shall govern; provided, however, that in the event such
conflict would require bondholder consent, the terms and provisions of the Indenture shall govern. 
 Section 6:
The Original Indenture, as heretofore amended and supplemented, insofar as it applies to the Series XXX Bonds, this Seventy-Second Supplemental Indenture and the Series XXX Bonds shall be governed by and construed in accordance with the laws of the
State of California, without regard (to the extent permitted by applicable law) to conflicts of laws principles thereof; provided, that, notwithstanding the foregoing, the creation, perfection and enforcement of any mortgage or lien on real
property or improvements thereon or fixtures attached thereto under the Original Indenture, as heretofore amended and supplemented, insofar as it applies to the Series XXX Bonds, or this Seventy-Second Supplemental Indenture shall be governed by and
construed in accordance with the laws of the State where such real property or improvements thereon or fixtures attached thereto, as the case may be, are located, without regard (to the extent permitted by applicable law) to conflicts of laws
principles thereof. 
 Section 7: The words “execution,” “signed,” “signature,” and
words of like import in this Seventy-Second Supplemental Indenture or in any instruments, agreements, certificates, legal opinions, negative assurance letters or other documents entered into or delivered pursuant to or in connection with this
Seventy-Second Supplemental Indenture shall include (subject to the provisions set forth in the last sentence of this Section 7) images of manually executed signatures transmitted by facsimile, email or other electronic format (including,
without limitation, “pdf,” “tif” or “jpg”) and electronic signatures (including, without limitation, DocuSign and AdobeSign). The use of electronic signatures and electronic records (including, without limitation, any
contract or other record created, generated, sent, communicated, received, or stored by electronic means) shall be of the same legal effect, validity and enforceability as a manually executed signature or use of a paper-based record-keeping system
to the fullest extent permitted by applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act and any other applicable law, including, without limitation,
any state law based on the Uniform Electronic Transactions Act or the Uniform Commercial Code. Without limitation to the foregoing, and anything in this Seventy-Second Supplemental Indenture to the contrary notwithstanding, except as set forth in
the proviso to this sentence, (a) this Seventy-Second Supplemental Indenture and any other instruments, agreements, certificates, legal opinions, negative assurance letters or other documents entered into or delivered pursuant to or in
connection with this Seventy-Second Supplemental Indenture may be executed, attested and transmitted by any of the foregoing electronic means and formats and (b) all references in this Seventy-Second Supplemental Indenture to the execution,
attestation or authentication of any bond of this series (including any Global Security) or any certificate of authentication appearing on or attached to any such bond by means of a manual or facsimile signature shall be deemed to include signatures
that are made or transmitted by any of the foregoing electronic means or formats; provided that, notwithstanding the foregoing, this Seventy-Second Supplemental Indenture may not be executed or attested by the parties hereto by DocuSign, AdobeSign
or other electronic signature, and no Series XXX Bond (including, without limitation, any Global Security) and no certificate of authentication on any Series XXX Bond (including, without limitation, any Global Security) may be executed by DocuSign,
AdobeSign or other electronic signature and each certificate of authentication must be executed by the Trustee by manual signature of an authorized signatory. 

{Signature Page Follows} 

  
 14 

 IN WITNESS WHEREOF, SAN DIEGO GAS & ELECTRIC COMPANY has caused this Seventy-Second
Supplemental Indenture to be signed in its name and behalf by its duly authorized officer and its corporate seal to be hereunto affixed duly attested by its Secretary or one of its Assistant Secretaries, and U.S. BANK NATIONAL ASSOCIATION, to
evidence its acceptance of the trusts hereby created, has caused this Seventy-Second Supplemental Indenture to be signed in its name and behalf by its duly authorized officer as of the day and year first above written. 

 

			
	SAN DIEGO GAS & ELECTRIC COMPANY
		
	By:	 	 /s/ Valerie A. Bille

	Name: Valerie A. Bille
	Title: Vice President, Chief Accounting Officer, Controller and Treasurer

 (CORPORATE SEAL) 
 Attest:

  

			
	By:	 	 /s/ Jennifer F. Jett

	Name: Jennifer F. Jett
	Title: Assistant Secretary

  

			
	U.S. BANK NATIONAL ASSOCIATION, AS TRUSTEE
		
	By:	 	 /s/ Fonda Hall

	Name: Fonda Hall
	Title: Vice President

A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which
this certificate is attached, and not the truthfulness, accuracy, or validity of that document. 

  

					
	STATE OF CALIFORNIA	  	)	  	
		  	)    ss	  	
	COUNTY OF SAN DIEGO	  	)	  	

 On March 9, 2022, before me, Leslie C. French, a Notary Public, personally appeared VALERIE A. BILLE and
JENNIFER F. JETT, who proved to me on the basis of satisfactory evidence to be the persons whose names are subscribed to the within instrument and acknowledged to me that they executed the same in their authorized capacities, and that by their
signatures on the instrument the persons, or the entity upon behalf of which the persons acted, executed the instrument. 
 I certify under
PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. 
 WITNESS my hand and
official seal. 
 /s/ Leslie C.
French                     
 SIGNATURE OF NOTARY
PUBLIC 

A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which
this certificate is attached, and not the truthfulness, accuracy, or validity of that document. 

  

					
	STATE OF CALIFORNIA	  	)	  	
		  	)    ss	  	
	COUNTY OF LOS ANGELES	  	)	  	

 On March 10, 2022, before me, C. M. Barberena, a Notary Public, personally appeared FONDA HALL, of U.S.
BANK NATIONAL ASSOCIATION, who proved to me on the basis of satisfactory evidence to be the person whose name is subscribed to the within instrument and acknowledged to me that he/she executed the same in his/her authorized capacity, and that by
his/her signature on the instrument the person, or the entity upon behalf of which the person acted, executed the instrument. 
 I certify
under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. 
 WITNESS my hand and
official seal. 
 /s/ C. M.
Barberena                     
 SIGNATURE OF NOTARY
PUBLIC 

 EXHIBIT A 

FORM OF BOND 

(Attached) 

 [If this bond is issued as a global security, insert the following legend: THIS SECURITY 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 SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS
SECURITY 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. ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY OTHER PERSON IS WRONGFUL, INASMUCH AS THE REGISTERED OWNER HEREOF HAS AN INTEREST HEREIN.] 
 SAN DIEGO
GAS & ELECTRIC COMPANY 
 (INCORPORATED UNDER THE LAWS OF THE STATE OF CALIFORNIA) 

3.000% FIRST MORTGAGE BOND, 

SERIES XXX, DUE 2032 
  

			
	No. ______	  	$___________________

 CUSIP No. 797440 CB8 

ISIN No. US797440CB87 
 SAN DIEGO GAS &
ELECTRIC COMPANY, a corporation organized and existing under the laws of the State of California (hereinafter called the “Company”, which term shall include any successor corporation, as defined in the Indenture referred to on the
reverse hereof), for value received, hereby promises to pay to ____________________________, or registered assigns, the principal sum of _____________________________dollars in lawful money of the United States of America, on March 15, 2032,
and to pay interest thereon from March 11, 2022, or from the most recent date to which interest has been paid or duly provided for on the Series XXX Bonds (as defined on the reverse hereof), at the rate of 3.000% per annum in like lawful money,
payable semi-annually in arrears, on March 15 and September 15 (each, an “Interest Payment Date”) in each year, commencing September 15, 2022, to the person in whose name this bond (as defined on the reverse hereof)
is registered at the close of business on the immediately preceding March 1 and September 1, respectively, until the Company’s obligation with respect to the payment of such principal (and premium, if any) shall be discharged as
provided in the Indenture hereinafter mentioned. The principal of (and premium, if any) and interest on this bond will be paid at the office or agency maintained by the Company for that purpose (initially the corporate trust office of the Trustee
(as defined on the reverse hereof)) in the City and County of Los Angeles, State of California and, if Series XXX Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of Article I of
the Seventy-Second Supplemental Indenture (as defined on the reverse hereof), at the office or agency maintained by the Company for such purpose in the Borough of Manhattan, City and County of New York, State of New York. Notwithstanding the
foregoing, so long as the registered holder of this bond is a depositary (as defined in the Seventy-Second Supplemental Indenture) or its nominee, payment of the principal of and premium, if any, and interest on this bond will be made by wire
transfer of immediately available funds; and, if the Series XXX Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of Article I of the Seventy-Second Supplemental Indenture, the
Company may at its option pay interest on the Series XXX Bonds in definitive certificated form by check mailed to the addresses of the persons entitled to payment or by wire transfer to bank accounts in the United States designated in writing to the
Trustee at least 15 days before the applicable Interest Payment Date by the persons entitled to such payment. 
 The provisions of this bond
are continued on the reverse hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place. 

This bond shall not be valid or become obligatory for any purpose unless and until U.S. BANK NATIONAL ASSOCIATION, as Trustee under the
Indenture, or its successor thereunder, shall have signed the certificate of authentication endorsed hereon. 

  
 A-1 

 IN WITNESS WHEREOF, SAN DIEGO GAS & ELECTRIC COMPANY has caused this instrument to
be executed in its name by the signature or facsimile signature of its President or any Vice President and its corporate seal or a facsimile thereof to be hereto affixed and attested by the signature or facsimile signature of its Secretary or any
Assistant Secretary. 
  

			
	Dated:__________________________________	  	 SAN DIEGO GAS & ELECTRIC COMPANY
  

By:
                                         
                       
 Name:

Title:

	  
 (CORPORATE SEAL)

 
 Attest:
  

                          
                              

Name:
 Title:
	  	

  
 A-2 

 [REVERSE SIDE OF 3.000% FIRST MORTGAGE BOND, SERIES XXX, DUE 2032] 

This bond is one of a duly authorized issue of bonds of the Company, known as its First Mortgage Bonds, of the series and designation
indicated on the face hereof (the “Series XXX Bonds”), all issued and to be issued under and equally secured by a Mortgage and Deed of Trust dated July 1, 1940, and indentures supplemental thereto, including the Seventy-Second
Supplemental Indenture (the “Seventy-Second Supplemental Indenture”) dated as of March 11, 2022 (which Mortgage and Deed of Trust, as so amended and supplemented and as the same may be further amended or supplemented from time
to time, is herein called the “Indenture”), executed by the Company to U.S. Bank National Association, as successor trustee (herein called, together with its successors in such capacity, the “Trustee”), to which
Indenture reference is hereby made for a description of the property mortgaged, pledged, hypothecated and in which a security interest was granted, the nature and extent of the security, the rights of the holders of the Series XXX Bonds as to such
security, and the terms and conditions upon which the Series XXX Bonds may be issued under the Indenture and are secured. The principal hereof may be declared or may become due on the conditions, in the manner and at the time set forth in the
Indenture, upon the happening of a completed default (as defined in the Indenture) as in the Indenture provided. This Series XXX Bond is one of a series of Series XXX Bonds and is sometimes referred to as “this bond.” 

Interest on the Series XXX Bonds will be calculated on the basis of a 360-day year consisting of
twelve 30-day months. 
 With the consent of the Company and to the extent permitted by and as
provided in the Indenture, the rights and obligations of the Company or of the holders of the Series XXX Bonds, or the terms and provisions of the Indenture or of any indentures supplemental thereto, may be modified or altered by the affirmative
vote of the holders of the percentage of principal amount of bonds required by the Indenture; provided, however, that without the consent of the holder hereof no such modification or alteration shall permit, among other things, the reduction
of the principal or premium, if any, or the extension of the maturity of the principal of this bond, or the reduction of the rate of interest hereon, or any other modification of the terms of payment of such principal or premium, if any, or
interest. 
 The Company, the Trustee, any paying agent, any registrar, and any depositary may deem and treat the person in whose name this
bond is registered as the absolute owner hereof for the purpose of receiving payment of or on account of the principal hereof and premium, if any, and interest hereon and for all other purposes and shall not be affected by any notice to the
contrary. 
 Prior to December 15, 2031 (the “Par Call Date”), the Company may redeem the Series XXX Bonds at the
Company’s option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of: 

(1)(a) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date
(assuming the Series XXX Bonds matured on the Par Call Date) on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate
plus 20 basis points less (b) interest accrued to the date of redemption, and 
 (2) 100% of the principal amount of the Series XXX
Bonds to be redeemed, 
 plus, in either case, accrued and unpaid interest thereon to the redemption date. 

On and after the Par Call Date, the Company may redeem the Series XXX Bonds at the Company’s option, in whole or in part, at any time and
from time to time, at a redemption price equal to 100% of the principal amount of the Series XXX Bonds being redeemed plus accrued and unpaid interest thereon to the redemption date. 

Notwithstanding the foregoing, installments of interest on Series XXX Bonds that are due and payable on any Interest Payment Date falling on
or prior to a redemption date will be payable on that Interest Payment Date to the registered holders thereof as of the close of business on the relevant record date according to the terms of the Series XXX Bonds and the Indenture. 

  
 A-3 

 Notice of any redemption will be mailed at least 30 days, but not more than 60 days, before
the redemption date to each registered holder of the Series XXX Bonds to be redeemed. Once notice of redemption is mailed, the Series XXX Bonds called for redemption will become due and payable on the redemption date and at the applicable redemption
price, plus accrued and unpaid interest to the redemption date, provided that the Company may rescind any notice of redemption by notice given not less than five days prior to the proposed redemption date. Redemption will not be conditional upon
receipt by the Trustee of monies sufficient to pay the redemption price. 
 Unless the Company defaults in payment of the redemption price,
on and after the redemption date interest will cease to accrue on the Series XXX Bonds or portions thereof called for redemption. The Company will pay the redemption price and any accrued interest once the Series XXX Bonds are surrendered for
redemption. If only a portion of any Series XXX Bond is redeemed, the Trustee will deliver one or more new Series XXX Bonds for the remaining portion without charge. 

“Treasury Rate” means, with respect to any redemption date, the yield determined by the Company in accordance with the
following two paragraphs. 
 The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as
yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third business day (as defined below) preceding the redemption date based upon the yield or yields for the most recent day that
appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily)—H.15” (or any successor designation or
publication) (“H.15”) under the caption “U.S. government securities–Treasury constant maturities–Nominal” (or any successor caption or heading). In determining the Treasury Rate, the Company shall select, as applicable:
(1) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the redemption date to the Par Call Date (the “Remaining Life”); or (2) if there is no such Treasury constant maturity on H.15 exactly
equal to the Remaining Life, the two yields – one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining
Life – and shall interpolate to the Par Call Date on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (3) if there is no such Treasury constant maturity on H.15
shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be
deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the redemption date. As used in this paragraph and the immediately succeeding paragraph, the term “business
day” means any day (other than a Saturday or Sunday) on which banking institutions in The City of New York are not authorized or obligated by law or executive order to remain closed. 

If on the third business day preceding the redemption date H.15 or any successor designation or publication is no longer published, the
Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury
security maturing on, or with a maturity that is closest to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity
date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding
the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these
two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In
determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage
of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places. 

  
 A-4 

 The Company’s actions and determinations in determining the redemption price shall be
conclusive and binding for all purposes, absent manifest error. The Company will notify the Trustee of the redemption price promptly after the calculation thereof and the Trustee shall have no duty or obligation with respect to calculation of the
redemption price. 
 In the event that the Company elects to redeem only a portion of the outstanding Series XXX Bonds, (a) the Series
XXX Bonds to be redeemed shall be selected as provided in the Indenture and, in the case of Series XXX Bonds represented by a Global Security (as defined in the Seventy-Second Supplemental Indenture), in accordance with the procedures of The
Depository Trust Company (or its successor as depositary) and (b) in the case of any Series XXX Bond being redeemed in part, the principal amount redeemed must be $1,000 or an integral multiple of $1,000 and the remaining principal amount must
be an authorized denomination. 
 As more fully provided in and subject to the provisions of the Indenture, the Company will redeem the
Series XXX Bonds in the event of the sale, release, taking by eminent domain or purchase by public authority of property constituting or including all or substantially all of the electric distribution system of the Company in the City of San Diego,
all as more fully provided in the second paragraph of Section 13 of Article XI of the Indenture, in which event the Company will redeem Series XXX Bonds (in the principal amount determined pursuant to the second paragraph of Section 13 of
Article XI of the Indenture) at a redemption price equal to 100% of the principal amount of the Series XXX Bonds being redeemed, plus accrued and unpaid interest on the Series XXX Bonds being redeemed to the applicable redemption date. 

This bond is transferable as prescribed in the Indenture by the registered owner hereof in person, or by his duly authorized attorney, at the
office or agency maintained by the Company for that purpose (initially the corporate trust office of the Trustee) in the City and County of Los Angeles, State of California, and, if Series XXX Bonds are issued in definitive certificated form under
the circumstances set forth in clause (2) of Section 4 of Article I of the Seventy-Second Supplemental Indenture, at the office or agency maintained by the Company for such purpose in the Borough of Manhattan, City and County of New York,
State of New York, upon surrender and cancellation of this bond and thereupon a new registered bond or bonds of the same series of authorized denominations and of a like aggregate principal amount, will be issued to the transferee in exchange
herefor as provided in the Indenture, upon payment of any tax or taxes or other governmental charges required to be paid by the Company by reason of such transfer. 

The registered owner of any Series XXX Bond, at the option of such holder, may surrender the same, accompanied by a written instrument of
transfer in form approved by the Company duly executed by the registered owner, at the office or agency maintained by the Company for that purpose (initially the corporate trust office of the Trustee) in the City and County of Los Angeles, State of
California and, if Series XXX Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of Article I of the Seventy-Second Supplemental Indenture, at the office or agency maintained by
the Company for such purpose in the Borough of Manhattan, City and County of New York, State of New York, for cancellation in exchange for another or other registered bonds of the said series of higher or lower authorized denominations of an
aggregate principal amount equal to the aggregate principal amount of the bond or bonds so surrendered and bearing interest as provided in Section 9 of Article II of the Indenture, and upon payment of any tax or taxes or other governmental
charges required to be paid by the Company by reason of such exchange and subject to the terms and conditions specified in the Indenture, and thereupon the Company shall execute and deliver to the Trustee and the Trustee shall authenticate and
deliver such other bonds to such registered owner at its office or at such office or agency of the Company, at the option of such registered owner. 

No recourse shall be had for the payment of the principal of (or premium, if any) or the interest on this bond, or any part thereof, or of any
claim based hereon or in respect hereof or of said Indenture, against any incorporator, or any past or future stockholder, officer or director, as such, of the Company or of any predecessor or successor corporation, either directly or through the
Company, or through any such predecessor or successor corporation, or through any receiver or a trustee in bankruptcy, whether by virtue of any constitution, statute or rule of law or by the enforcement of any assessment or penalty or otherwise, all
such liability being, by the acceptance hereof and as part of the consideration for the issue hereof, expressly waived and released, as more fully provided in the Indenture. 

  
 A-5 

 In any case where any Interest Payment Date, any redemption date or the final maturity date
of the Series XXX Bonds shall not be a Business Day at any Place of Payment (as those terms are defined in the next sentence), then payment of the principal, premium, if any, and interest due on such Interest Payment Date, redemption date or final
maturity date, as the case may be, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment with the same force and effect as if made on such Interest Payment Date,
redemption date or final maturity date, as the case may be, and, in that case, no interest will accrue on the amount payable for the period from and after such Interest Payment Date, redemption date or final maturity date, as the case may be. As
used in the immediately preceding sentence, “Place of Payment” means the City and County of Los Angeles, State of California and any other place or places where the Company may from time to time maintain an office or agency where Series
XXX Bonds may be presented for payment, and “Business Day,” when used with respect to any Place of Payment, means a day other than (i) a Saturday or a Sunday or (ii) a day on which banking institutions in that Place of Payment
are authorized or obligated by law or executive order to remain closed. 
 This Series XXX Bond shall be governed by and construed in
accordance with the laws of the State of California, without regard (to the extent permitted by applicable law) to conflicts of laws principles thereof. 

************** 
 This bond is one
of the bonds of the series designated therein, described in the within-mentioned Indenture. 
 U.S. BANK NATIONAL ASSOCIATION, 

As Trustee 
 By: _________________________________ 

Authorized Officer 
 Date of Authentication: 

  
 A-6EX-4.2

 Exhibit 4.2 

RECORDING REQUESTED BY 
 AND WHEN RECORDED MAIL TO:
     
 U.S. BANK NATIONAL ASSOCIATION 

633 W. FIFTH STREET, 24th FLOOR 

LOS ANGELES, CA 90071 
 ATTN:
GLOBAL CORPORATE TRUST 
 Index as a UCC Filing and an Indenture 

This is a Security Agreement and a Mortgage of Chattels 

as well as a Mortgage of Real Estate and Other Property 

SEVENTY-THIRD SUPPLEMENTAL INDENTURE 

FROM 
 SAN DIEGO
GAS & ELECTRIC COMPANY 
 TO 

U.S. BANK NATIONAL ASSOCIATION, as Trustee 

**************** 
 Dated as
of March 11, 2022 
  

 THIS SEVENTY-THIRD SUPPLEMENTAL INDENTURE IS A SECURITY 

AGREEMENT AND A MORTGAGE OF CHATTELS AS WELL AS 

A MORTGAGE OF REAL ESTATE AND OTHER PROPERTY 

THIS SEVENTY-THIRD SUPPLEMENTAL INDENTURE, dated as of March 11, 2022, by and between SAN DIEGO GAS & ELECTRIC COMPANY, a
corporation duly organized and existing under and by virtue of the laws of the State of California, having its principal office in that State in the City of San Diego (the “Company”), and U.S. BANK NATIONAL ASSOCIATION, a banking
association duly organized under an act known as the “National Bank Act,” of the United States of America, having a corporate trust office in the City of Los Angeles, State of California, as Trustee (the “Trustee”). 

WHEREAS, the Company executed and delivered a Mortgage and Deed of Trust (the “Original Indenture”), dated July 1, 1940,
to The Bank of California, National Association, as predecessor trustee to Bankers Trust Company of California, National Association, as predecessor trustee to First Trust of California, National Association, (subsequently renamed U.S. Bank Trust
National Association) as predecessor trustee to the Trustee, to secure payment of the principal of and the interest on all bonds of the Company at any time outstanding thereunder according to their tenor and effect, and to provide the terms and
provisions with respect to its First Mortgage Bonds, 3 3/8% Series due July 1, 1970, issued in the aggregate principal amount of $16,000,000 and heretofore retired; and 

WHEREAS, the Company executed and delivered to the then current trustee, a First Supplemental Indenture dated as of December 1, 1946, a
Second Supplemental Indenture dated as of March 1, 1948, a Third Supplemental Indenture dated as of April 1, 1952, a Fourth Supplemental Indenture dated as of April 1, 1954, a Fifth Supplemental Indenture dated as of October 1,
1955, a Sixth Supplemental Indenture dated as of October 1, 1957, a Seventh Supplemental Indenture dated as of October 1, 1960, an Eighth Supplemental Indenture dated as of March 1, 1967, a Tenth Supplemental Indenture dated as of
December 1, 1968, an Eleventh Supplemental Indenture dated as of February 1, 1970, a Twelfth Supplemental Indenture dated as of September 1, 1971, a Thirteenth Supplemental Indenture dated as of January 15, 1974, a Fourteenth
Supplemental Indenture dated as of December 15, 1974, a Fifteenth Supplemental Indenture dated as of May 1, 1975, a Seventeenth Supplemental Indenture dated as of July 15, 1976, an Eighteenth Supplemental Indenture dated as of
March 15, 1977, a Nineteenth Supplemental Indenture dated as of May 1, 1978, a Twentieth Supplemental Indenture dated as of March 15, 1980, a Twenty-First Supplemental Indenture dated as of August 1, 1980, a Twenty-Second
Supplemental Indenture dated as of July 15, 1981, a Twenty-Third Supplemental Indenture dated as of January 15, 1982, a Twenty-Fourth Supplemental Indenture dated as of August 16, 1982, a Twenty-Fifth Supplemental Indenture dated as
of August 16, 1982, a Twenty-Sixth Supplemental Indenture dated as of August 16, 1982, a Twenty-Seventh Supplemental Indenture dated as of June 1, 1983, a Twenty-Eighth Supplemental Indenture dated as of July 15, 1983, a
Twenty-Ninth Supplemental Indenture dated as of September 1, 1983, a Thirty-First Supplemental Indenture dated as of May 1, 1984, a Thirty-Second Supplemental Indenture dated as of December 1, 1984, a Thirty-Third Supplemental
Indenture dated as of September 1, 1985, a Thirty-Fourth Supplemental Indenture dated as of December 1, 1985, a Thirty-Fifth Supplemental Indenture dated as of July 1, 1986, a Thirty-Sixth Supplemental Indenture dated as of
December 1, 1986, a Thirty-Seventh Supplemental Indenture dated as of September 1, 1987, a Thirty-Eighth Supplemental Indenture dated as of April 15, 1990, a Thirty-Ninth Supplemental Indenture dated as of December 1, 1991, a
Fortieth Supplemental Indenture dated as of April 1, 1992, a Forty-First Supplemental Indenture dated as of June 15, 1992, a Forty-Second Supplemental Indenture dated as of September 1, 1992, a Forty-Third Supplemental Indenture dated
as of December 1, 1992, a Forty-Fourth Supplemental Indenture dated as of April 1, 1993, a Forty-Fifth Supplemental Indenture dated as of June 1, 1993, a Forty-Sixth Supplemental Indenture dated as of July 1, 1993, a
Forty-Seventh Supplemental Indenture dated as of June 1, 1995, a Forty-Eighth Supplemental Indenture dated as of June 1, 1995, a Forty-Ninth Supplemental Indenture dated as of June 1, 2004, a Fiftieth Supplemental Indenture dated as
of May 19, 2005, a Fifty-First Supplemental Indenture dated as of November 17, 2005, a Fifty-Second Supplemental Indenture dated as of June 8, 2006, a Fifty-Third Supplemental Indenture dated as of September 1, 2006, a
Fifty-Fourth Supplemental Indenture dated as of September 20, 2007, a Fifty-Fifth Supplemental Indenture dated as of May 14, 2009, a Fifty-Sixth Supplemental Indenture dated as of May 13, 2010, a Fifty-Seventh Supplemental Indenture
dated as of August 26, 2010, a Fifty-Eighth Supplemental Indenture dated as of August 18, 2011, a Fifty-Ninth Supplemental Indenture dated as of October 6, 2011, a Sixtieth Supplemental Indenture dated as of November 17, 2011, a
Sixty-First Supplemental Indenture dated as of March 22, 2012, a Sixty-Second Supplemental Indenture dated as of September 9, 2013, a Sixty-Third Supplemental Indenture dated as of March 12, 2015, a Sixty-Fourth Supplemental Indenture
dated as of March 12, 

 
2015, a Sixty-Fifth Supplemental Indenture dated May 19, 2016, a Sixty-Sixth Supplemental Indenture dated as of June 8, 2017, a Sixty-Seventh Supplemental Indenture dated as of
May 17, 2018, a Sixty-Eighth Supplemental Indenture dated as of May 31, 2019, a Sixty-Ninth Supplemental Indenture dated as of April 7, 2020, a Seventieth Supplemental Indenture dated as of September 28, 2020 and a Seventy-First
Supplemental Indenture dated as of August 13, 2021, whereby, among other things, the Company set forth certain of the particulars of the Bonds of series designated “First Mortgage Bonds, 2 3/4% Series due December 1, 1981” issued
in the aggregate principal amount of $2,800,000, “First Mortgage Bonds, Series C due 1978” issued in the aggregate principal amount of $10,000,000, “First Mortgage Bonds, Series D due 1982” issued in the aggregate principal
amount of $12,000,000, “First Mortgage Bonds, Series E due 1984” issued in the aggregate principal amount of $17,000,000, “First Mortgage Bonds, Series F due 1985” issued in the aggregate principal amount of $18,000,000,
“First Mortgage Bonds, Series G due 1987” issued in the aggregate principal amount of $12,000,000, “First Mortgage Bonds, Series H due 1990” issued in the aggregate principal amount of $30,000,000, “First Mortgage Bonds,
Series I due 1997” issued in the aggregate principal amount of $25,000,000, “First Mortgage Bonds, Series J due 1998” issued in the aggregate principal amount of $35,000,000, “First Mortgage Bonds, Series K due 2000” issued
in the aggregate principal amount of $40,000,000, “First Mortgage Boards, Series L due 2001” issued in the aggregate principal amount of $45,000,000, “First Mortgage Bonds, Series M due 2004” issued in the aggregate principal
amount of $75,000,000, “First Mortgage Bonds, Series N due 1979” issued in the aggregate principal amount of $50,000,000, “First Mortgage Bonds, Series O due 1982” issued in the aggregate principal amount of $40,000,000,
“First Mortgage Bonds, Series P due 2006” issued in the aggregate principal amount of $45,000,000, “First Mortgage Bonds, Series Q due 2007” issued in the aggregate principal amount of $50,000,000, “First Mortgage Bonds,
Series R due 2008” issued in the aggregate principal amount of $50,000,000, “First Mortgage Bonds, Series S due 2010” issued in the aggregate principal amount of $50,000,000, “First Mortgage Bonds, Series T due 2010” issued
in the aggregate principal amount of $75,000,000, “First Mortgage Bonds, Series U-1 due 1984, and U-2 due 1994” issued in the aggregate principal amount of
$6,567,000 for Series U-1 and $13,268,000 for Series U-2, “First Mortgage Bonds, Series V due 2011” issued in the aggregate amount of $50,000,000, “First
Mortgage Bonds, Series W due 1988” issued in the aggregate principal amount of $40,000,000, “First Mortgage Bonds, Series X due 1987” issued in the aggregate principal amount of $20,000,000, “First Mortgage Bonds, Series Y due
1987” issued in the aggregate principal amount of $15,000,000, “First Mortgage Bonds, Series Z, due 2013” issued in the aggregate principal amount of $65,000,000, “First Mortgage Bonds, Series AA, due 2018” issued in the
aggregate principal amount of $150,000,000, “First Mortgage Bonds, Series BB, due 2018” issued in the aggregate principal amount of $150,000,000, “First Mortgage Bonds, Series CC, due 2008” issued in the aggregate principal
amount of $53,000,000, “First Mortgage Bonds Series DD, due 2008” issued in the aggregate principal amount of $27,000,000, “First Mortgage Bonds, Series EE, due 2015” issued in the aggregate principal amount of $100,000,000,
“First Mortgage Bonds, Series FF, due 2007” issued in the aggregate principal amount of $35,000,000, “First Mortgage Bonds, Series GG, due 2021” issued in the aggregate principal amount of $44,250,000, “First Mortgage Bonds,
Series HH, due 2021” issued in the aggregate principal amount of $81,350,000, “First Mortgage Bonds, Series II due 2023” issued in the aggregate principal amount of $25,000,000, “First Mortgage Bonds, Series JJ, due 2015”
issued in the aggregate principal amount of $100,000,000, “First Mortgage Bonds, Series KK, due 2015” issued in the aggregate principal amount of $14,400,000, “First Mortgage Bonds, Series LL, due 2022” issued in the aggregate
principal amount of $60,000,000, “First Mortgage Bonds, Series MM due 2002” issued in the aggregate principal amount of $80,000,000, “First Mortgage Bonds, Series NN” issued in the aggregate principal amount of $118,615,000,
“First Mortgage Bonds, Series OO due 2027” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series PP, due 2018” issued in the aggregate principal amount of $70,795,000, “First Mortgage Bonds,
Series QQ, due 2018” issued in the aggregate principal amount of $14,915,000, “First Mortgage Bonds, Series RR, due 2021” issued in the aggregate principal amount of $60,000,000, “First Mortgage Bonds, Series SS, due 2018”
issued in the aggregate principal amount of $92,945,000, “First Mortgage Bonds, Series TT due 2020” issued in the aggregate principal amount of $57,650,000, “First Mortgage Bonds, Series UU due 2020” issued in the aggregate
principal amount of $16,700,000, “First Mortgage Bonds, Series VV due 2034” issued in the aggregate principal amount of $43,615,000, “First Mortgage Bonds, Series WW due 2034” issued in the aggregate principal amount of
$40,000,000, “First Mortgage Bonds, Series XX due 2034” issued in the aggregate principal amount of $35,000,000, “First Mortgage Bonds, Series YY due 2034” issued in the aggregate principal amount of $24,000,000, “First
Mortgage Bonds, Series ZZ due 2034” issued in the aggregate principal amount of $33,650,000, “First Mortgage Bonds, Series AAA due 2039” issued in the aggregate principal amount of $75,000,000, “First Mortgage Bonds, Series BBB
due 2035” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series CCC due 2015” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series DDD due 2026” issued in
the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series EEE due 2018” issued in the aggregate principal amount of $161,240,000, “First Mortgage Bonds, Series FFF due 2037”

  
 2 

 
issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series GGG due 2039” issued in the aggregate principal amount of $300,000,000, “First Mortgage
Bonds, Series HHH due 2040” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series III due 2040” issued in the aggregate principal amount of $500,000,000, “First Mortgage Bonds, Series JJJ due
2021” issued in the aggregate principal amount of $350,000,000, “First Mortgage Bonds, Series LLL due 2041” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series MMM due 2042” issued in the
aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series NNN due 2023” issued in the aggregate principal amount of $450,000,000, “Floating Rate First Mortgage Bonds, Series OOO due 2017” issued in the aggregate
principal amount of $140,000,000, “Amortizing First Mortgage Bonds, Series PPP due 2022” issued in the aggregate principal amount of $250,000,000, “First Mortgage Bonds, Series QQQ due 2026” issued in the aggregate principal
amount of $500,000,000, “First Mortgage Bonds, Series RRR due 2047” issued in the aggregate principal amount of $400,000,000, “First Mortgage Bonds, Series SSS due 2048” issued in the aggregate principal amount of $400,000,000,
“First Mortgage Bonds, Series TTT due 2049” issued in the aggregate principal amount of $400,000,000, “First Mortgage Bonds, Series UUU due 2050” issued in the aggregate principal amount of $400,000,000, “First Mortgage
Bonds, Series VVV due 2030” issued in the aggregate principal amount of $800,000,000 and “Green First Mortgage Bonds, Series WWW due 2051” issued in the aggregate principal amount of $750,000,000, respectively, all of which First
Mortgage Bonds have heretofore been retired or redeemed, except the Series BBB due 2035, the Series DDD due 2026, the Series FFF due 2037, the Series GGG due 2039, the Series HHH due 2040, the Series III due 2040, the Series LLL due 2041, the Series
MMM due 2042, the Series NNN due 2023, the Series QQQ due 2026, the Series RRR due 2047, the Series SSS due 2048, the Series TTT due 2049, the Series UUU due 2050, the Series VVV due 2030 and the Series WWW due 2051, which are presently issued and
outstanding; and 
 WHEREAS, certain of the provisions of the Original Indenture have been amended by the aforesaid Second and Tenth
Supplemental Indentures, a Ninth Supplemental Indenture dated as of August 1, 1968 and a Sixteenth Supplemental Indenture dated August 28, 1975; and 

WHEREAS, the Original Indenture and each of said Supplemental Indentures have been recorded in the Official Records of the Recorders of the
Counties of San Diego, Orange, Riverside, and Imperial in the State of California, the Counties of Yuma and Maricopa in the State of Arizona and the County of Clark in the State of Nevada, as follows: 

 

											
	 	  	 	  	Counties of
	 Document
	  	Official	  	San Diego	  	Orange	  	Riverside	  	Imperial
	 	  	Records	  	 	  	 	  	 	  	 
	 Original Indenture
	  	Book
Page
Date	  	1087
 1
Oct. 10, 1940
	  	1062
 300
Oct. 10, 1940
	  	1765
 364
July 13, 1955
	  	1369
 232
Nov. 22, 1974

	 First Supplemental Indenture
	  	Book
Page
Date	  	2321
 48
 Jan. 2, 1947
	  	1506
 472
 Jan. 9, 1947
	  	1765
 499
 July 13,
1955
	  	1369
 332
 Nov. 22,
1974

	 Second Supplemental Indenture
	  	Book
Page
Date	  	2537
 363

Mar. 16, 1948
	  	1616
 190

Mar. 15, 1948
	  	1765 448
July 13, 1955	  	1369 343
Nov. 22, 1974
	 Third Supplemental Indenture
	  	Book
Page
Date	  	4424
 535
 Apr. 3, 1952
	  	2311
 116
 Apr. 3, 1952
	  	1765 475
July 13, 1955	  	1369 370
Nov. 22, 1974
	 Fourth Supplemental Indenture
	  	Book
Page
Date	  	5193
 217
 Apr. 2, 1954
	  	2701
 153
 Apr. 2, 1954
	  	1765 336
July 13, 1955	  	1369 409
Nov. 22, 1974
	 Fifth Supplemental Indenture
	  	Book
Page
Date	  	5893
 291
 Dec. 5, 1955
	  	3304
 205
 Dec. 5, 1955
	  	1829
 3
 Dec. 5, 1955
	  	2369 456
Nov. 22, 1974

  
 3 

											
	 	  	 	  	Counties of
	 Document
	  	Official	  	San Diego	  	Orange	  	Riverside	  	Imperial
	 	  	Records	  	 	  	 	  	 	  	 
	 Sixth Supplemental Indenture
	  	Book
Page
Date	  	6829
 390
 Nov. 12, 1957
	  	4099
 109
Nov. 12, 1957
	  	2175
 538
Nov. 12, 1957
	  	1369
 492
Nov. 22, 1974

	 Seventh Supplemental Indenture
	  	Book
Page
Date	  	1960 Series 1
File No. 202061
Oct. 10, 1960	  	5455
 385
 Oct. 10, 1960
	  	2780
 3
 Oct. 10, 1960
	  	1369
 541
 Nov. 22,
1974

	 Eighth Supplemental Indenture
	  	Book
Page
Date	  	1967 Series 8
File No. 33860
Mar. 13, 1967	  	8197
 129
 Mar. 13, 1967
	  	Endorsement
No. 20925
Mar. 13, 1967	  	1369
 618
 Nov. 22,
1974

	 Ninth Supplemental Indenture
	  	Book
Page
Doc. No.
Date	  	1968 Series 9
 138926Aug. 14, 1968
	  	8691
 69
 9816

Aug. 14, 1968
	  	78781
 Aug. 14, 1968
	  	1369
 694
 Nov. 22,
1974

	 Tenth Supplemental Indenture
	  	Book
Page
Doc. No.
Date	  	1968 Series 9
 215131Dec. 9, 1968
	  	8810
 375
 Dec. 9, 1968
	  	Endorsement
No. 119982
Dec. 9, 1968	  	1369
 706
 Nov. 22,
1974

	 Eleventh Supplemental Indenture
	  	Book
Page
Doc. No.
Date	  	1970
 27782
 Feb. 16, 1970
	  	9217
 516
 Feb. 16, 1970
	  	Endorsement
No. 14780
Feb. 16, 1970	  	1369
 725
 Nov. 22,
1974

	 Twelfth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 212688
Sept. 20, 1971	  	9810
 539

Sept. 20, 1971
	  	Endorsement
No. 106508
Sept. 20, 1971	  	1369
 744
 Nov. 22,
1974

	 Thirteenth Supplemental Indenture
	  	Book
Page
Date
	  	File/Page
No. 74-006878
Jan. 10, 1974	  	11055
 1
 Jan. 10, 1974
	  	Endorsement
 No. 3853Jan. 10, 1974
	  	1369
 763
 Nov. 22,
1974

	 Fourteenth Supplemental Indenture
	  	Book
Page
Date
	  	File/Page
No. 74-322156
Dec. 11, 1974	  	11303
 458
 Dec. 11, 1974
	  	Endorsement
No. 157219
Dec. 11, 1974	  	1369
 1689
 Dec. 11,
1974

	 Fifteenth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 755-108612
May 7, 1975	  	11395
 1879
 May 7,
1975
	  	Instrument
No. 52617
May 7, 1975	  	1374
 809
 May 7,
1975

	 Sixteenth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 75-235624
Sept. 2, 1975	  	11500
 1620
 Sept. 2, 1975
	  	Instrument
No. 107732
Sept. 3, 1975	  	1378
 952
 Sept. 2,
1975

	 Seventeenth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 76-224493
July 16, 1976	  	11815
 640
 July 16,
1976
	  	Instrument
No. 103484
July 16, 1976	  	1389
 687
 July 16,
1976

	 Eighteenth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 77-100483
Mar. 18, 1977	  	12110
 58
 Mar. 18, 1977
	  	Instrument
No. 45619
Mar. 18, 1977	  	1398
 1675
 Mar. 18,
1977

	 Nineteenth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 78-194210
May 12, 1978	  	12672
 1803-1822
May 12, 1978
	  	Instrument
No. 94450
May 12, 1978	  	1415
 1638

May 12, 1978

  
 4 

											
	 	  	 	  	Counties of
	 Document
	  	Official	  	San Diego	  	Orange	  	Riverside	  	Imperial
	 	  	Records	  	 	  	 	  	 	  	 
	 Twentieth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 80-082569
Mar. 11, 1980	  	13530
 722 Mar. 11,1980
	  	Instrument
 No. 47195Mar. 11, 1980
	  	1448
 1221
Mar. 11, 1980

	 Twenty-First Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 80-245100
Aug. 1, 1980	  	13687
 349 Aug. 1, 1980
	  	Instrument
 No. 139349Aug. 1, 1980
	  	1455
 1660
 Aug. 1,
1980

	 Twenty-Second Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 81-22576
July 17, 1981	  	Instrument
No. 24605
July 17, 1981	  	Instrument
No. 135815
July 17, 1981	  	1472
 508
 July 17,
1981

	 Twenty-Third Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 82-02387
Jan. 27, 1982	  	Instrument
No. 82-031423
Jan. 27, 1982	  	Instrument
 No. 16093Jan. 27, 1982
	  	1479
 1714
 Jan. 27,
1982

	 Twenty-Fourth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 82-257258
Aug. 19, 1982	  	File/Page
No. 82-291894
Aug. 19, 1982	  	File/Page
No. 82/143370212
Aug. 19, 1982	  	1489
 Aug. 19, 1982

	 Twenty-Fifth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 82-257259
Aug. 19, 1982	  	File/Page
No. 82-291895
Aug. 19, 1982	  	File/Page
No. 82-143371
Aug. 19, 1982	  	1489
 236
 Aug. 19,
1982

	 Twenty-Sixth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 82-257260
Aug. 19, 1982	  	File/Page
No. 82-291896
Aug. 19, 1982	  	File/Page
No. 82/143372260
Aug. 19, 1982	  	1489
 Aug. 19, 1982

	 Twenty-Seventh Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 83-200545
June 15, 1983	  	File/Page
No. 83-253901
June 15, 1983	  	File/Page
No. 118670
June 15, 1983	  	1503
 743
 June 15,
1983

	 Twenty-Eighth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 83-252396
July 22, 1983	  	File/Page
No. 83-316224
July 22, 1983	  	File/Page
No. 147671
July 22, 1983	  	1505
 583
 July 22,
1983

	 Twenty-Ninth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
No. 83-339007
Sept. 22, 1983	  	File/Page
No. 83-417956
Sept. 22, 1983	  	File/Page
 194083

Sept. 22, 1983
	  	1508
 1425

Sept. 22, 1983

  

							
	 	  	 	  	Counties of
	 	  	Official	  	 	  	 
	Thirtieth	  	Records	  	Yuma	  	Maricopa
	 Supplemental Indenture Consisting of Original and Twenty-Nine Supplemental Indentures
thereto
	  	Book
Page
Book
Page
Date	  	Docket 1352
272-1002
Docket 1353
1-264
Sept. 28, 1983	  	File No.
83-399354
Oct. 3, 1983

  
 5 

															
	 	  	 	  	Counties of
	 Document
	  	Official	  	San Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	 	  	Records	  	 	  	 	  	 	  	 	  	 	  	 
	 Thirty-First Supplemental Indenture
	  	Book
Page
Date	  	File/Page
84-161897
5/2/84	  	File/Page
84-180870
 5/2/844/30/84
	  	File/Page
92011
5/2/84	  	1520
 1552
4/30/84
	  	Docket
1382
743-761	  	File No.
84-186813
5/2/84
	 Thirty- Second Supplemental Indenture
	  	Book
Page
Date	  	File/Page
84-466428
12/14/84	  	File/Page
84-517843
12/14/84	  	File/Page
267452
12/14/84	  	1533 753
12/14/84	  	Docket
1413
216-235
12/14/84	  	File No.
84-537706
12/14/84
	 Thirty-Third Supplemental Indenture
	  	Book
Page
Date	  	File/Page
85-323210
9/4/85	  	File/Page
85-333505
9/4/85	  	File/Page
198810
9/4/85	  	1546 708
9/4/85	  	Docket
1450
816
9/4/85	  	File No.
85-418309
9/4/85
	 Thirty-Fourth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
85-42465
12/2/85	  	File/Page
85-481794
12/2/85	  	File/Page
270136
12/2/85	  	1550 1573
12/3/85	  	Docket
1463
215
12/3/85	  	File No.
85-568874
12/2/85
	 Thirty-Fifth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
86-279922
7/8/86	  	File/Page
86-290957
7/8/86	  	File/Page
158161
7/8/86	  	1562 549
7/8/86	  	Docket
1491
639-657
7/8/86	  	File No.
86-347412
7/8/86
	 Thirty-Sixth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
86-576027
12/10/86	  	File/Page
86-606666
12/10/86	  	File/Page
314771
12/10/86	  	1571 240
12/10/86	  	Docket
1512
5-24
12/10/86	  	File/Page
86-680502
12/10/86
	 Thirty- Seventh Supplemental Indenture
	  	Book
Page
Date	  	File/Page
87-532270
9/21/87	  	File/Page
87-530266
9/21/87	  	File/Page
273181
9/21/87	  	1588 844
9/21/87	  	Docket
1555
844
9/21/87	  	File/Page
87-585903
9/21/87
	 Thirty-Eighth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
90-217585
4/23/90	  	File/Page
90-212277
4/23/90	  	File/Page
146794
4/23/90	  	1646 1280
4/23/90	  	Docket
1686
92-120
4/23/90	  	File/Page
90-176460
4/23/90
	 Thirty-Ninth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
91-632073
12/09/91	  	File/Page
91-674397
12/09/91	  	File/Page
425578
12/09/91	  	1687 743
12/09/91	  	Docket
1771
711-728
12/09/91	  	File/Page
91-0574751
12/09/91
	 Fortieth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
92-185636
4/1/92	  	File/Page
92-202372
4/1/92	  	File/Page
115201
4/1/92	  	Book/Page
92-06577
4/1/92	  	Docket
1790
954-970
4/1/92	  	File/Page
92-0169646
4/1/92
	 Forty-First Supplemental Indenture
	  	Book
Page
Date	  	File/Page
92-0363471
6/11/92	  	File/Page
92-393790
6/11/92	  	File/Page
214904
6/11/92	  	Book/Page
92-011833
6/11/92	  	Docket
1804
73-88
6/11/92	  	File/Page
92-0317072
6/11/92
	 Forty-Second Supplemental Indenture
	  	Book
Page
Date	  	File/Page
92-0650893
10/13/92	  	File/Page
92-692066
10/13/92	  	File/Page
384167
10/13/92	  	Book/Page
92-21988
10/13/92	  	Docket
1824
670-689
10/13/92	  	File/Page
92-0575062
10/13/92
	 Forty-Third Supplemental Indenture
	  	Book
Page
Date	  	File/Page
92-0788665
12/9/92	  	File/Page
92-845626
12/10/92	  	File/Page
471625
12/10/92	  	Book/Page
92-27082
12/9/92	  	Docket
1834
187-206
12/9/92	  	File/Page
92-0700568
12/9/92

  
 6 

															
	 	  	 	  	Counties of
	 Document
	  	Official	  	San Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	 	  	Records	  	 	  	 	  	 	  	 	  	 	  	 
	 Forty-Fourth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
93-0257065
4/27/93	  	File/Page
93-0277892
4/27/93	  	File/Page
153382
4/27/93	  	Book/Page
93-009487
4/27/93	  	Docket
1859 Fee 09300
4/27/93	  	File/Page
93-0246725
4/26/93
	 Forty-Fifth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
93-0395609
6/23/93	  	File/Page
93-0420127
6/23/93	  	File/Page
239922
6/23/93	  	Book/Page
93-14224
6/23/93	  	Docket Fee
14413 6/23/93	  	File/Page
93-0403060
6/23/93
	 Forty-Sixth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
93-0474705
7/26/93	  	File/Page
93-0496100
7/26/93	  	File/Page
288868
7/27/93	  	Book/Page
93-17399
7/27/93	  	Docket Fee
17163 7/27/93	  	File/Page
93-0487598
7/27/93
	 Forty-Seventh Supplemental Indenture
	  	Book
Page
Date	  	File/Page
95-0230457
6/01/95	  	File/Page
95-0232951
6/01/95	  	File/Page
175604
6/01/95	  	Book/Page
95-11739
6/01/95	  	Docket
246-264
6/01/95	  	File/Page
95-0313576
6/01/95
	 Forty-Eighth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
95-0230458
6/01/95	  	File/Page
95-0232952
6/01/95	  	File/Page
175605
6/01/95	  	Book/Page
95-11740
6/01/95	  	Docket
265-284
6/01/95	  	File/Page
95-0313577
6/01/95
	 Forty-Ninth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
05-00384477
1/14/05	  	File/Page
04-683110
7/28/04	  	File/Page
04-0766976
9/28/04	  	Book/Page
04-021901
7/15/04	  	Docket
04-29663
8/16/04	  	File/Page
04-941699
8/13/04
	 Fiftieth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
20050441722
5/25/05	  	File/Page
2005000405730
5/26/05	  	File/Page
20050145832
5/25/05	  	Book/Page
019964
5/25/05	  	Docket
200522373
5/25/05	  	File/Page
20050711918
5/27/05
	 Fifty-First Supplemental Indenture
	  	Book
Page
Date	  	File/Page
20051016267
11/23/05	  	File/Page
2005000945695
11/28/05	  	File/Page
20050981667
11/29/05	  	Book/Page
2006005449
1/30/06	  	Docket
200553032
12/2/05	  	File/Page
20051852692
12/7/05
	 Fifty-Second Supplemental Indenture
	  	Book
Page
Date	  	File/Page
2006-0413693
6/12/06	  	File/Page
2006000404447
6/16/06	  	File/Page
2006-0422620
6/12/06	  	Book/Page
2006-032418
7/11/06	  	Docket 2006-
23999 6/12/06	  	File/Page
2006-0802735
6/14/06
	 Fifty-Third Supplemental Indenture
	  	Book
Page
Date	  	File/Page
2006-0683713
9/26/06	  	File/Page
2006000643109
9/27/06	  	File/Page
713252
9/27/06	  	Book/Page
06-46145
9/28/06	  	Docket 2006-
39635 9/29/06	  	File/Page
20061310143
10/3/06
	 Fifty-Fourth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
2007-0625504
9/25/07	  	File/Page
2007000581227
9/25/07	  	File/Page
2007-0600369
9/25/07	  	Book/Page
2007-036497
9/25/07	  	Docket 2007-
33238 9/25/07	  	File/Page
2007-1062404
9/26/07
	 Fifty-Fifth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
2009-0320954
6/12/09	  	File/Page
2009000305886
6/12/09	  	File/Page
2009-0311041
6/18/09	  	Book/Page
2009-017587
6/12/09	  	Docket 16744
6/15/09	  	File/Page
20090542104
6/15/09

  
 7 

															
	 	  	 	  	Counties of
	 Document
	  	Official	  	San Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	 	  	Records	  	 	  	 	  	 	  	 	  	 	  	 
	 Fifty-Sixth
	  	Book	  	File/Page	  	File/Page	  	File/Page	  	Book/Page	  	Docket	  	File/Page
	Supplemental	  	Page	  	2010-0252569	  	2010000239342	  	2010-0235807	  	2010-012850	  	2010-12687	  	20100431348
	Indenture	  	Date	  	5/20/10	  	5/21/10	  	5/21/10	  	5/21/10	  	5/21/10	  	5/21/10
								
	Fifty-Seventh	  	Book	  	File/Page	  	File/Page	  	File/Page	  	Book/Page	  	Docket	  	File/Page
	Supplemental	  	Page	  	2010-0490784	  	2010000458947	  	2010-0443991	  	2010-023359	  	2010-22669	  	20100800415
	Indenture	  	Date	  	9/16/10	  	9/16/10	  	9/16/10	  	9/16/10	  	9/16/10	  	9/16/10
								
	Fifty-Eighth	  	Book	  	File/Page	  	File/Page	  	File/Page	  	Book/Page	  	Docket	  	File/Page
	Supplemental	  	Page	  	2011-0503399	  	2011000478379	  	2011-0432021	  	2011-023234	  	2011-21920	  	20110802020
	Indenture	  	Date	  	09/28/11	  	09/28/11	  	09/29/11	  	09/28/11	  	09/28/11	  	09/28/11

  

					
	 Document
	  	Official
Records	  	County of Clark
	 Fifty-Ninth Supplemental Indenture including the Original Indenture and fifty-eight prior
supplemental indentures thereto
	  	Book
Page
Date	  	File/Page
201110120001817
10/12/11

  

																	
	 	  	 	  	Counties of
	 Document
	  	Official	  	 	  	San	  	 	  	 	  	 
	 	  	Records	  	Clark	  	Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	 Sixtieth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
2011120100
01775
12/1/2011	  	File/Page
2011-
0643662
12/1/11	  	File/Page
201100061
1302 12/1/11	  	File/Page
2011-
0529988
12/1/11	  	Book/Page
2011-
028759
12/1/11	  	Docket
2011-
26889
12/1/11	  	File/Page
20110993
917 12/1/11
	 Sixty-First Supplemental Indenture
	  	Book
Page
Date	  	File/Page
20120410
000789
4/10/12	  	File/Page
2012-
0207656
4/10/12	  	File/Page
20120020 0917
4/10/12	  	File/Page
2012-
0163282
4/10/12	  	Book/Page
2012-
007887
4/10/12	  	Docket
2012-
08966
4/10/12	  	File/Page
20120296804
4/10/12
	 Sixty-Second Supplemental Indenture
	  	Book
Page
Date	  	File/Page
 201309300001532
9/30/13
	  	File/Page
2013-
0592759
9/30/13	  	File/Page
201300055
9137 9/30/13	  	File/Page
0466671
9/26/13	  	Book/Page
2013022171
9/26/13	  	Docket
2013-
26910
9/30/13	  	File/Page
20130866
250 9/30/13
	 Sixty-Third Supplemental Indenture
	  	Book
Page
Date	  	File/Page
20150318-
0000267
3/18/2015	  	File/Page
2015-
0125062
3/18/2015	  	File/Page
2015000137709
3/18/15	  	File/Page
2015-
0105656
3/17/2015	  	Book/Page
2015005389
3/20/2015	  	Docket
2015-
06017
3/20/2015	  	File/Page
2015-
0308470
5/01/15
	 Sixty-Fourth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
20150318-
0000268
3/18/2015	  	File/Page
2015-
0125063
3/18/2015	  	File/Page
2015000137710
3/18/2015	  	File/Page
2015-
0105657
3/17/2015	  	Book/Page
2015005397
3/20/15	  	Docket
2015-
06018
3/20/2015	  	File/Page
2015-
0308471
5/01/15
	 Sixty-Fifth Supplemental Indenture
	  	Book
Page
Date	  	File/Page
20160525-
0000179
5/25/2016	  	File/Page
2016-
0255036
5/25/2016	  	File/Page
2016000231993
5/24/2016	  	File/Page
2016-
0218234
5/27/2016	  	Book/Page
2016010377
6/1/2016	  	Docket
2016-
12517
5/25/2016	  	File/Page
2016-
0355233
5/24/2016

  
 8 

																	
	 	  	 	  	Counties of
	 Document
	  	Official	  	 	  	San	  	 	  	 	  	 
	 	  	Records	  	Clark	  	Diego	  	Orange	  	Riverside	  	Imperial	  	Yuma	  	Maricopa
	 Sixty-Sixth Supplemental Indenture
	  	Book
 Page
 Date
	  	File/Page
 20170612-
0000678

6/12/2017
	  	File/Page
 2017-
0261951

6/12/2017
	  	File/Page
 201700023
8610

6/12/2017
	  	File/Page
 2017-
0233575

6/12/2017
	  	Book/Page
 2017013517

6/15/2017
	  	Docket
 2017-
15226

6/14/2017
	  	File/Page
 2017-
0429520

6/13/2017

	 Sixty-Seventh Supplemental Indenture
	  	Book
 Page
 Date
	  	File/Page
 20180522-
0000994

5/22/2018
	  	File/Page
 2018-
0206641

5/22/2018
	  	File/Page
 201800018
8655

5/23/2018
	  	File/Page
 2018-
0203756

5/22/2018
	  	Book/Page
 2018009579

5/29/2018
	  	Docket
 2018-
15182

6/12/2018
	  	File/Page
 2018-
0390726

5/22/2018

	 Sixty-Eighth Supplemental Indenture
	  	Book
 Page
 Date
	  	File/Page
 20190604-
0001990

6/4/2019
	  	File/Page
 2019-
0213646

6/4/2019
	  	File/Page
 201900019
2899

6/5/2019
	  	File/Page
 2019-
0212524

6/13/2019
	  	Book/Page
 2019009987

6/7/2019
	  	Docket
 2019-
14196

6/4/2019
	  	File/Page
 2019-
0414851

6/4/2019

	 Sixty-Ninth Supplemental Indenture
	  	Book
 Page
 Date
	  	File/Page
 20200416-
0001114

4/16/2020
	  	File/Page
 2020-
0180371

4/8/2020
	  	File/Page
 202000016
0646

4/9/2020
	  	File/Page
 2020-
0218763

5/22/2020
	  	Book/Page
 2020006709

4/9/2020
	  	Docket
 2020-
11190

4/13/2020
	  	File/Page
 20200313674

4/13/2020

	 Seventieth Supplemental Indenture
	  	Book
 PageDate
	  	File/Page
20200930-
 00028959/30/2020
	  	File/Page
 2020-0585299

9/30/2020
	  	File/Page
202000053
 55979/30/2020
	  	File/Page
 2020-0464141

9/29/2020
	  	Book/Page
 2020018059

10/6/2020
	  	Docket
 2020-
29556

9/29/2020
	  	File/Page
 2020-
 0950240

10/6/2020

	 Seventy-First Supplemental Indenture
	  	Book
 PageDate
	  	File/Page
20210813-
 00020668/13/2021
	  	File/Page
 2021-0595081

8/20/2021
	  	File/Page
202100054
 10538/27/2021
	  	File/Page
 2021-0532084

9/7/2021
	  	Book/Page
 2021021459

8/18/2021
	  	Docket
 2021-
30813

8/13/2021
	  	File/Page
 20210879215

8/13/2021

 WHEREAS, the Board of Directors of the Company has duly authorized the creation of an additional series of
bonds to be designated “First Mortgage Bonds, Series YYY, due 2052,” as hereinafter set forth in this Seventy-Third Supplemental Indenture, and, contemporaneously with the execution and delivery of this Seventy-Third Supplemental
Indenture, the Company is executing and delivering to the Trustee a Seventy-Second Supplemental Indenture dated as of March 11, 2022 (the “Seventy-Second Supplemental Indenture”) whereby, among other things, the Company has set
forth certain of the particulars of the bonds of another additional series, which are designated “First Mortgage Bonds, Series XXX, due 2032” and are to be issued on the date hereof contemporaneously with the issuance, pursuant to this
Seventy-Third Supplemental Indenture, of First Mortgage Bonds, Series YYY, due 2052; and 
 WHEREAS, the execution and delivery of this
Seventy-Third Supplemental Indenture has been duly authorized by resolution of the Board of Directors of the Company; and 
 WHEREAS, all
the conditions and requirements necessary to make this Seventy-Third Supplemental Indenture a valid, binding and legal instrument in accordance with its terms and for the purposes herein expressed have been performed and fulfilled and the execution
and delivery hereof have been in all respects duly authorized. 
 NOW, THEREFORE, in order further to secure the payment of the principal of
and premium, if any, and interest on all of the bonds of the Company at any time outstanding under the Original Indenture, as heretofore amended and supplemented, as amended and supplemented by this Seventy-Third Supplemental Indenture and the
Seventy-Second Supplemental Indenture and as the same may from time to time be further amended and supplemented (the “Indenture”) and to secure the performance and observance of each and every of the covenants, conditions and
agreements of the Indenture, as from time to time amended and supplemented, and for and in consideration of the premises, and of the sum of One Dollar ($1.00) to the Company duly paid by the Trustee (the receipt whereof is hereby

  
 9 

 
acknowledged), the Company has executed and delivered this Seventy-Third Supplemental Indenture and has granted, bargained, sold, warranted, released, conveyed, assigned, transferred, mortgaged,
pledged, hypothecated, granted a security interest in, set over and confirmed, and by these presents does grant, bargain, sell, warrant, release, convey, assign, transfer, mortgage, pledge, hypothecate, grant a security interest in, set over and
confirm unto U.S. Bank National Association, as Trustee, and to its respective successors in said trust forever, with power of sale, all property, real, personal and mixed, now owned or hereafter acquired or to be acquired by the Company, and
wheresoever situated (except such property as is expressly excepted or excluded from the lien and security interest of the Indenture, and property of a successor corporation or corporations excluded from the lien and security interest thereof by the
provisions of Section 3 of Article XIV thereof) subject to the rights reserved by the Company in and by other provisions of the Indenture, including in the property subject and to be subject to the lien and security interest thereof and hereof
(without in any manner limiting or impairing by the enumeration of the same the scope and intent of the foregoing or of any general description contained in the Original Indenture or in this or any other supplemental indenture) all lands, rights-of-way, other land rights, flowage and other water rights, power houses, dams, reservoirs, docks, roads, and buildings, structures and other land improvements; steam,
and other electric generating plants, including buildings and other structures, turbines, generators, exciters, boilers and other boiler plant equipment, condensing equipment, and all auxiliary equipment; stations and substations; electric
transmission and distribution systems, including structures, poles, towers, fixtures, conduits, insulators, wires, cables, transformers, services and meters; steam heating plants and systems, including mains and equipment; gas plants, transmission
and distribution systems, including pipe lines, structures, tanks, mains, compressor stations, purifier stations, pressure holders, governors, services and meters; communication systems, office, shop and other buildings and structures, and
equipment; apparatus and equipment and materials and supplies of all other kinds and descriptions; and all municipal and other franchises, leaseholds, licenses, permits, and privileges; 

TOGETHER WITH all and singular the tenements, hereditaments and appurtenances belonging or in any wise appertaining to the aforesaid property
or any part thereof with the reversion and reversions, remainder and remainders, tolls, rents and revenues, issues, income, proceeds, product and profits thereof, and all the estate, right, title and interest and claim whatsoever, at law as well as
in equity, which the Company now has or may hereafter acquire in and to the aforesaid property and franchises and every part and parcel thereof (except such property as is expressly excepted or excluded from the lien and security interest of the
Indenture, and property of a successor corporation or corporations excluded from the lien and security thereof by the provisions of Section 3 of Article XIV thereof), subject to the rights reserved by the Company in and by other provisions of
the Indenture; 
 It is hereby agreed by the Company that, except as aforesaid, all the property, rights, and franchises acquired by the
Company after the date hereof shall be as fully embraced within the lien and security interest hereof as if such property were now owned by the Company and were specifically described herein and conveyed and a security interest therein granted
hereby; 
 SAVING AND EXCEPTING, HOWEVER, anything to the contrary notwithstanding contained herein or in the granting clauses of the
Original Indenture and said Supplemental Indentures (a) such property described or referred to in any of such granting clauses as has been from time to time, released or sold free from the lien and security interest of the Original Indenture
(or the Original Indenture, as supplemented) in accordance and compliance with the provisions thereof (or of the Original Indenture, as supplemented, as the case may be), and (b) all of the following property (whether now owned by the Company
or hereafter acquired by it): (1) all gas, electric energy and steam produced, purchased or otherwise acquired; (2) all contracts, choses in action, shares of stock, bonds, notes, evidences of indebtedness, and other securities, other than any
of the foregoing which may be required to be deposited from time to time with the Trustee in accordance with the provisions of the Indenture or are required by some express provision thereof to be deposited with the Trustee; (3) merchandise and
appliances at any time acquired for the purpose of sale or lease to customers and others and contracts for the sale of merchandise and appliances; (4) motor vehicles; (5) timber on land owned by the Company; (6) minerals or mineral
rights in lands owned by the Company; (7) oil, coal or gas, or oil, coal or gas rights in land owned by the Company or gas wells or oil wells or equipment therefor or coal mines or equipment therefor; (8) fuel and other personal property
which are consumable in their use in the operation of the properties of the Company; (9) bills and accounts receivable; (10) cash on hand and in banks other than such cash as may be deposited from time to time with the Trustee in
accordance with the provisions of the Indenture or as is required by some express provision thereof to be deposited with the Trustee; and (11) the last day of the term of each leasehold estate now or hereafter enjoyed by the Company. The
Company may, however, expressly subject to the lien and security interest and operation of the Original Indenture and all indentures supplemental thereto all or any part of the property of the character described in clause (b) of this
paragraph; 

  
 10 

 TO HAVE AND TO HOLD all said properties, real, personal and mixed, mortgaged, pledged, or
conveyed and in which a security interest has been granted by the Company as aforesaid, or intended so to be, unto the Trustee and its successors and assigns forever, subject, however, to Permitted Liens as defined in the Indenture; 

IN TRUST NEVERTHELESS, for the equal pro rata benefit and security as provided in the Original Indenture and all indentures supplemental
thereto of all and every of the bonds issued and to be issued in accordance with the provisions of the Original Indenture and all indentures supplemental thereto, without preference, priority or distinction as to lien or security interest of any
over the others by reason of priority in time of the issue, negotiation or maturity thereof, subject, however, to the provisions of the Original Indenture and all indentures supplemental thereto relating to any sinking fund or similar fund for the
benefit of the bonds of any particular series; 
 The Company does further covenant and agree with the Trustee as follows: 

ARTICLE I 
 SERIES YYY
BONDS 
 Section 1: There is hereby created, for issuance under the Original Indenture as supplemented by the
said Supplemental Indentures (including this Seventy-Third Supplemental Indenture), a series of bonds designated Series YYY, due 2052, each of which shall bear the descriptive title “First Mortgage Bonds, Series YYY, due 2052” (herein
sometimes referred to as “Series YYY Bonds”), and the form thereof shall contain suitable provisions with respect to the matters hereinafter in this Section specified. The Series YYY Bonds shall mature on March 15, 2052 and
shall be issued in denominations of $1,000 and integral multiples thereof as the Company may from time to time execute and deliver. The Series YYY Bonds shall bear interest at the rate and from the date, shall mature as to principal, and shall be
payable as to principal and premium, if any, and interest at such place or places and in such money, all as provided in the form of Series YYY Bond set forth on Exhibit A hereto (the “Form of Bond”) and by the applicable
provisions of the Indenture. In addition, March 11, 2022 shall be an interest payment date for the Series YYY Bonds for purposes of Section 9 of Article II of the Indenture, provided that no interest shall be payable on such date.
The principal and premium, if any, and interest on the Series YYY Bonds shall be payable at the office or agency maintained by the Company for such purpose (initially the corporate trust office of the Trustee) in the City and County of Los Angeles,
State of California and, if Series YYY Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of this Article I, at the office or agency maintained by the Company for such purpose in
the Borough of Manhattan, City and County of New York, State of New York. The Series YYY Bonds shall be dated as in Section 9 of Article II of the Indenture provided with respect to registered bonds without coupons. 

The Series YYY Bonds shall further be redeemable, exchangeable, transferable and otherwise have the terms set forth in the Form of Bond. 

The Series YYY Bonds shall otherwise be of such terms, provisions, tenor and form as provided in this Seventy-Third Supplemental Indenture.

 Section 2: The Series YYY Bonds shall be executed, authenticated and delivered in accordance with the
provisions and shall be entitled to the protection and security of the Original Indenture, as supplemented by this Seventy-Third Supplemental Indenture and the other supplemental indentures, and shall be subject to all of the terms, conditions and
covenants and limitations thereof. The aggregate principal amount of the Series YYY Bonds, which may be executed by the Company and authenticated and delivered by the Trustee and secured by the Indenture as from time to time in effect, is limited
only to the extent provided in Section 1 of Article II of the Original Indenture. The Company has authorized the issuance and sale on the date hereof of $500,000,000 aggregate principal amount of Series YYY Bonds. The Company may, from time to
time, without notice to or the consent of the registered holders of the Series YYY Bonds but upon and subject to the terms and provisions of the Indenture, increase the principal amount of the Series YYY Bonds under the Indenture and issue such
increased principal amount, or any portion thereof. Any additional Series YYY Bonds so issued shall have the same form and terms (other than offering price, the date of original issuance and, under certain circumstances, the date from which interest
thereon shall begin to accrue and the first Interest Payment Date (as defined below)) as the Series YYY Bonds previously issued and shall form a single series of bonds under the Indenture with the previously issued Series YYY Bonds. 

  
 11 

 Section 3: The Series YYY Bonds shall be issued only as fully
registered bonds without coupons. The fully registered bonds without coupons and the certificate of authentication to be endorsed on all Series YYY Bonds shall be substantially in the form set forth on the Form of Bond. In addition, the Series YYY
Bonds may be issuable in whole or in part in the form of one or more securities that evidence all or part of the bonds of such series and are registered in the name of a depositary (as defined below) or a nominee thereof for such series (each, a
“Global Security”) and, in such case, the Board of Directors of the Company (or an authorized officer designated by the Board of Directors of the Company) shall appoint a clearing agency registered under the Securities Exchange Act
of 1934, as amended (the “Exchange Act”), designated to act as depositary (a “depositary”) for such Global Securities; the initial depositary so appointed is The Depository Trust Company. The definitive Series YYY
Bonds shall be numbered in such manner as the Company shall at any time or from time to time determine. 

Section 4: In the event Series YYY Bonds are issued as Global Securities the following provisions, in addition to
the provisions of the Indenture, shall apply: 
 (1) Each Global Security authenticated under the Indenture shall be registered in the
name of the depositary designated for such Global Security or a nominee thereof and delivered to such depositary or a nominee thereof or custodian therefor, and each such Global Security shall constitute a single Series YYY Bond for all purposes of
this Supplemental Indenture. 
 (2) Notwithstanding any other provision in this Supplemental Indenture, no Global Security may be
exchanged in whole or in part for Series YYY Bonds registered, and no transfer of a Global Security in whole or in part may be registered, in the name of any person other than the depositary for such Global Security or a nominee thereof unless
(A) such depositary has notified the Company that it is unwilling or unable to continue as depositary for the Global Security or Global Securities, as the case may be, representing the Series YYY Bonds and a successor depositary has not been
appointed by the Company within 90 days of receipt by the Company of such notification, (B) if at any time the depositary ceases to be a clearing agency registered under the Exchange Act at a time when the depositary is required to be so
registered to act as such depositary and no successor depositary shall have been appointed by the Company within 90 days after it became aware of the depositary’s ceasing to be so registered, (C) the Company, in its sole discretion,
executes and delivers to the Trustee a written order signed in the name of the Company by its Chairman of the Board, its President or a Vice President, and by its Treasurer, an Assistant Treasurer, its Secretary or an Assistant Secretary to the
effect that the Global Securities of such series shall be exchangeable as described below, or (D) a “completed default” (as defined in the Indenture) has occurred and is continuing with respect to the Series YYY Bonds. If any of the
events described in clauses (A) through (D) of the preceding sentence occur, the beneficial owners of interests in such Global Securities will be entitled to exchange those interests for definitive Series YYY Bonds and, without unnecessary
delay but in any event not later than the earliest date on which those interests may be so exchanged, the Company will prepare and deliver to the Trustee definitive Series YYY Bonds in such form and denominations as are required by or pursuant to
the Indenture, and in an aggregate principal amount equal to the aggregate principal amount of such Global Securities, such bonds to be duly executed by the Company. On or after the earliest date on which such beneficial interests may be so
exchanged, such Global Securities shall be surrendered from time to time by the depositary as shall be specified in the order from the Company with respect thereto (which the Company agrees to deliver) to the Trustee, as the Company’s agent for
such purpose, and in accordance with any instructions given to the Trustee and the depositary by the Company (which instructions shall be in writing but need not be contained in or accompanied by an officers’ certificate or be accompanied by an
opinion of counsel), to be exchanged, in whole or in part, for definitive Series YYY Bonds as described above without charge. The Trustee shall authenticate and make available for delivery, in exchange for each portion of each surrendered Global
Security, a like aggregate principal amount of definitive Series YYY Bonds of authorized denominations as the portion of such Global Security to be exchanged. Promptly following any such exchange in part, such Global Security shall be returned by
the Trustee to such depositary or its custodian. If a definitive Series YYY Bond is issued in exchange for any portion of a Global Security after the close of business at the place where such exchange occurs on or after (i) any regular record
date for a regularly scheduled interest payment date (an “Interest Payment Date”) for such bond and before the opening of business at that place of exchange on such Interest Payment Date, or (ii) any special record date for the
payment of interest for such bond which was not punctually paid or duly provided for on any Interest Payment Date (“Defaulted Interest”) and before the opening of business at such place of exchange on the

  
 12 

 
related proposed date for the payment of such Defaulted Interest, as the case may be, interest shall not be payable on such Interest Payment Date or proposed date for payment, as the case may be,
in respect of such definitive bond, but shall be payable on the Interest Payment Date or proposed date for payment, as the case may be, only to the person to whom interest in respect of such portion of such Global Security shall be payable in
accordance with the provisions of the Indenture and the Series YYY Bonds. 
 (3) Subject to Clause (2) above, any exchange or
transfer of a Global Security for other Series YYY Bonds may be made in whole or in part, and all definitive Series YYY Bonds issued in exchange for or upon transfer of a Global Security or any portion thereof shall be registered in such names as
the depositary for such Global Security shall direct. 
 (4) Every Series YYY Bond authenticated and delivered upon registration of
transfer of, or in exchange for or in lieu of, a Global Security or any portion thereof, shall be authenticated and delivered in the form of, and shall be, a Global Security, unless such bond is registered in the name of a person other than the
depositary for such Global Security or a nominee thereof. 
 (5) Every Global Security authenticated and delivered hereunder shall
bear a legend in substantially the following form: 
 THIS SECURITY 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 SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY 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. ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY OTHER PERSON IS WRONGFUL, INASMUCH AS THE
REGISTERED OWNER HEREOF HAS AN INTEREST HEREIN. 
 Section 5: The Series YYY Bonds may contain or have imprinted
thereon such provisions or specifications not inconsistent with the Indenture as may be required to comply with the rules of any stock exchange or any federal or state authority or commission, or to comply with usage with respect thereto, and may
bear such other appropriate endorsements or notations as are authorized or permitted by the Indenture. 

Section 6: In the manner and subject to certain conditions and limitations specified herein and in the Indenture,
Series YYY Bonds may be exchanged without a service charge for a like aggregate principal amount of such Series YYY Bonds of other authorized denomination or denominations; provided that the Company may require payment of a sum or sums sufficient to
reimburse it for any stamp tax or other governmental charge payable in connection therewith. 
 Section 7: The
Company shall maintain in the City and County of Los Angeles, State of California, and in such other place or places as the Company may designate at any time or from time to time, an office or agency where Series YYY Bonds, including Series YYY
Bonds issued in definitive certificated form, may be presented for payment, registration, transfer and exchange as provided therein or in the Indenture. Without limitation to the foregoing, if Series YYY Bonds are issued in definitive certificated
form under the circumstances set forth in clause (2) of Section 4 of this Article I, the Company shall also maintain in the Borough of Manhattan, City and County of New York, State of New York, an office or agency where Series YYY Bonds,
including Series YYY Bonds issued in definitive certificated form, may be presented for payment, registration, transfer and exchange as provided therein or in the Indenture. Such office or agency in the City and County of Los Angeles, State of
California, and any such office or agency in the Borough of Manhattan, City and County of New York, State of New York, shall be a corporate trust office of the Trustee unless and until the Company shall designate another office or agency by notice
in writing delivered to the Trustee. 
 Section 8: No transfer or exchange of any Series YYY Bonds pursuant to any
of the provisions of this Article I shall be made except upon and in accordance with all of the applicable terms, provisions and conditions of said bonds and of the Indenture. 

  
 13 

 ARTICLE II 

MISCELLANEOUS PROVISIONS 

Section 1: This instrument is executed and shall be construed as an indenture supplemental to the Original Indenture
and shall form a part thereof and, as supplemented by this Seventy-Third Supplemental Indenture, the Original Indenture as heretofore supplemented and amended is hereby confirmed. 

Section 2: All terms used in this Seventy-Third Supplemental Indenture shall be taken to have meaning as in the
Original Indenture, as heretofore supplemented and amended, except terms which may be otherwise expressly defined herein and in cases where the context clearly indicates otherwise. 

Section 3: In order to facilitate the filing of this Seventy-Third Supplemental Indenture, the same may be executed
in several counterparts, each of which, when so executed, shall be deemed to be an original, but such counterparts shall constitute but one and the same instrument. 

Section 4: All of the covenants, stipulations, promises and agreements in this Seventy-Third Supplemental Indenture
by or on behalf of the Company shall bind its successors and assigns, whether so expressed or not. 
 Section 5:
To the extent any provision in this Seventy-Third Supplemental Indenture conflicts with any provision in the Indenture, the provisions of this Seventy-Third Supplemental Indenture shall govern; provided, however, that in the event such
conflict would require bondholder consent, the terms and provisions of the Indenture shall govern. 
 Section 6:
The Original Indenture, as heretofore amended and supplemented, insofar as it applies to the Series YYY Bonds, this Seventy-Third Supplemental Indenture and the Series YYY Bonds shall be governed by and construed in accordance with the laws of the
State of California, without regard (to the extent permitted by applicable law) to conflicts of laws principles thereof; provided, that, notwithstanding the foregoing, the creation, perfection and enforcement of any mortgage or lien on real
property or improvements thereon or fixtures attached thereto under the Original Indenture, as heretofore amended and supplemented, insofar as it applies to the Series YYY Bonds, or this Seventy-Third Supplemental Indenture shall be governed by and
construed in accordance with the laws of the State where such real property or improvements thereon or fixtures attached thereto, as the case may be, are located, without regard (to the extent permitted by applicable law) to conflicts of laws
principles thereof. 
 Section 7: The words “execution,” “signed,” “signature,” and
words of like import in this Seventy-Third Supplemental Indenture or in any instruments, agreements, certificates, legal opinions, negative assurance letters or other documents entered into or delivered pursuant to or in connection with this
Seventy-Third Supplemental Indenture shall include (subject to the provisions set forth in the last sentence of this Section 7) images of manually executed signatures transmitted by facsimile, email or other electronic format (including,
without limitation, “pdf,” “tif” or “jpg”) and electronic signatures (including, without limitation, DocuSign and AdobeSign). The use of electronic signatures and electronic records (including, without limitation, any
contract or other record created, generated, sent, communicated, received, or stored by electronic means) shall be of the same legal effect, validity and enforceability as a manually executed signature or use of a paper-based record-keeping system
to the fullest extent permitted by applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act and any other applicable law, including, without limitation,
any state law based on the Uniform Electronic Transactions Act or the Uniform Commercial Code. Without limitation to the foregoing, and anything in this Seventy-Third Supplemental Indenture to the contrary notwithstanding, except as set forth in the
proviso to this sentence, (a) this Seventy-Third Supplemental Indenture and any other instruments, agreements, certificates, legal opinions, negative assurance letters or other documents entered into or delivered pursuant to or in connection
with this Seventy-Third Supplemental Indenture may be executed, attested and transmitted by any of the foregoing electronic means and formats and (b) all references in this Seventy-Third Supplemental Indenture to the execution, attestation or
authentication of any bond of this series (including any Global Security) or any certificate of authentication appearing on or attached to any such bond by means of a manual or facsimile signature shall be deemed to include signatures that are made
or transmitted by any of the foregoing electronic means or formats; provided that, notwithstanding the foregoing, this Seventy-Third Supplemental Indenture may not be executed or attested by the parties hereto by DocuSign, AdobeSign or other
electronic signature, and no Series YYY Bond (including, without limitation, any Global Security) and no certificate of authentication on any 

  
 14 

 Series YYY Bond (including, without limitation, any Global Security) may be executed by DocuSign, AdobeSign
or other electronic signature and each certificate of authentication must be executed by the Trustee by manual signature of an authorized signatory. 

{Signature Page Follows} 

  
 15 

 IN WITNESS WHEREOF, SAN DIEGO GAS & ELECTRIC COMPANY has caused this Seventy-Third
Supplemental Indenture to be signed in its name and behalf by its duly authorized officer and its corporate seal to be hereunto affixed duly attested by its Secretary or one of its Assistant Secretaries, and U.S. BANK NATIONAL ASSOCIATION, to
evidence its acceptance of the trusts hereby created, has caused this Seventy-Third Supplemental Indenture to be signed in its name and behalf by its duly authorized officer as of the day and year first above written. 

 

			
	SAN DIEGO GAS & ELECTRIC COMPANY
		
	By:	 	 /s/ Valerie A. Bille

	Name: Valerie A. Bille
	Title:   Vice President, Chief Accounting Officer,             Controller and Treasurer

  

			
	(CORPORATE SEAL)
	
	Attest:
		
	By:	 	 /s/ Jennifer F. Jett

	Name: Jennifer F. Jett
	Title:   Assistant Secretary

  

			
	U.S. BANK NATIONAL ASSOCIATION, AS TRUSTEE
		
	By:	 	 /s/ Fonda Hall

	Name: Fonda Hall
	Title:   Vice President

 
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which
this certificate is attached, and not the truthfulness, accuracy, or validity of that document. 

 STATE OF
CALIFORNIA                         ) 

                          
                                         
  )     ss 
 COUNTY OF SAN
DIEGO                        ) 

On March 9, 2022, before me, Leslie C. French, a Notary Public, personally appeared VALERIE A. BILLE and JENNIFER F. JETT, who proved to
me on the basis of satisfactory evidence to be the persons whose names are subscribed to the within instrument and acknowledged to me that they executed the same in their authorized capacities, and that by their signatures on the instrument the
persons, or the entity upon behalf of which the persons acted, executed the instrument. 
 I certify under PENALTY OF PERJURY under the laws
of the State of California that the foregoing paragraph is true and correct. 
 WITNESS my hand and official seal. 

 

	
	 /s/ Leslie C. French

	SIGNATURE OF NOTARY PUBLIC

 
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which
this certificate is attached, and not the truthfulness, accuracy, or validity of that document. 

 STATE OF
CALIFORNIA                    ) 

                    )
        ss 
 COUNTY OF LOS ANGELES             )

 On March 10, 2022, before me, C. M. Barberena, a Notary Public, personally appeared FONDA HALL, of U.S. BANK NATIONAL ASSOCIATION,
who proved to me on the basis of satisfactory evidence to be the person whose name is subscribed to the within instrument and acknowledged to me that he/she executed the same in his/her authorized capacity, and that by his/her signature on the
instrument the person, or the entity upon behalf of which the person acted, executed the instrument. 
 I certify under PENALTY OF PERJURY
under the laws of the State of California that the foregoing paragraph is true and correct. 
 WITNESS my hand and official seal. 

 

	
	 /s/ C. M. Barberena

	SIGNATURE OF NOTARY PUBLIC

 EXHIBIT A 

FORM OF BOND 

(Attached) 

 [If this bond is issued as a global security, insert the following legend: THIS SECURITY 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 SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS
SECURITY 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. ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY OTHER PERSON IS WRONGFUL, INASMUCH AS THE REGISTERED OWNER HEREOF HAS AN INTEREST HEREIN.] 
 SAN DIEGO
GAS & ELECTRIC COMPANY 
 (INCORPORATED UNDER THE LAWS OF THE STATE OF CALIFORNIA) 

3.700% FIRST MORTGAGE BOND, 

SERIES YYY, DUE 2052 
  

			
	No. ______	  	$___________________

 CUSIP No. 797440 CC6 

ISIN No. US797440CC60 
 SAN DIEGO GAS &
ELECTRIC COMPANY, a corporation organized and existing under the laws of the State of California (hereinafter called the “Company”, which term shall include any successor corporation, as defined in the Indenture referred to on the
reverse hereof), for value received, hereby promises to pay to ____________________________, or registered assigns, the principal sum of _____________________________dollars in lawful money of the United States of America, on March 15, 2052,
and to pay interest thereon from March 11, 2022, or from the most recent date to which interest has been paid or duly provided for on the Series YYY Bonds (as defined on the reverse hereof), at the rate of 3.700% per annum in like lawful money,
payable semi-annually in arrears, on March 15 and September 15 (each, an “Interest Payment Date”) in each year, commencing September 15, 2022, to the person in whose name this bond (as defined on the reverse hereof)
is registered at the close of business on the immediately preceding March 1 and September 1, respectively, until the Company’s obligation with respect to the payment of such principal (and premium, if any) shall be discharged as
provided in the Indenture hereinafter mentioned. The principal of (and premium, if any) and interest on this bond will be paid at the office or agency maintained by the Company for that purpose (initially the corporate trust office of the Trustee
(as defined on the reverse hereof)) in the City and County of Los Angeles, State of California and, if Series YYY Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of Article I of
the Seventy-Third Supplemental Indenture (as defined on the reverse hereof), at the office or agency maintained by the Company for such purpose in the Borough of Manhattan, City and County of New York, State of New York. Notwithstanding the
foregoing, so long as the registered holder of this bond is a depositary (as defined in the Seventy-Third Supplemental Indenture) or its nominee, payment of the principal of and premium, if any, and interest on this bond will be made by wire
transfer of immediately available funds; and, if the Series YYY Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of Article I of the Seventy-Third Supplemental Indenture, the
Company may at its option pay interest on the Series YYY Bonds in definitive certificated form by check mailed to the addresses of the persons entitled to payment or by wire transfer to bank accounts in the United States designated in writing to the
Trustee at least 15 days before the applicable Interest Payment Date by the persons entitled to such payment. 
 The provisions of this bond
are continued on the reverse hereof and such continued provisions shall for all purposes have the same effect as though fully set forth at this place. 

This bond shall not be valid or become obligatory for any purpose unless and until U.S. BANK NATIONAL ASSOCIATION, as Trustee under the
Indenture, or its successor thereunder, shall have signed the certificate of authentication endorsed hereon. 

  
 A-1 

 IN WITNESS WHEREOF, SAN DIEGO GAS & ELECTRIC COMPANY has caused this instrument to
be executed in its name by the signature or facsimile signature of its President or any Vice President and its corporate seal or a facsimile thereof to be hereto affixed and attested by the signature or facsimile signature of its Secretary or any
Assistant Secretary. 
  

							
	Dated:
                                         
                               	 		 	  SAN DIEGO GAS & ELECTRIC COMPANY

  

							
		 		 	By:	 	 
		 		 	Name:
		 		 	Title:

  

	
	(CORPORATE SEAL)
	
	Attest:
	
	  

	Name:

	Title:

  
 A-2 

 [REVERSE SIDE OF 3.700% FIRST MORTGAGE BOND, SERIES YYY, DUE 2052] 

This bond is one of a duly authorized issue of bonds of the Company, known as its First Mortgage Bonds, of the series and designation
indicated on the face hereof (the “Series YYY Bonds”), all issued and to be issued under and equally secured by a Mortgage and Deed of Trust dated July 1, 1940, and indentures supplemental thereto, including the Seventy-Third
Supplemental Indenture (the “Seventy-Third Supplemental Indenture”) dated as of March 11, 2022 (which Mortgage and Deed of Trust, as so amended and supplemented and as the same may be further amended or supplemented from time
to time, is herein called the “Indenture”), executed by the Company to U.S. Bank National Association, as successor trustee (herein called, together with its successors in such capacity, the “Trustee”), to which
Indenture reference is hereby made for a description of the property mortgaged, pledged, hypothecated and in which a security interest was granted, the nature and extent of the security, the rights of the holders of the Series YYY Bonds as to such
security, and the terms and conditions upon which the Series YYY Bonds may be issued under the Indenture and are secured. The principal hereof may be declared or may become due on the conditions, in the manner and at the time set forth in the
Indenture, upon the happening of a completed default (as defined in the Indenture) as in the Indenture provided. This Series YYY Bond is one of a series of Series YYY Bonds and is sometimes referred to as “this bond.” 

Interest on the Series YYY Bonds will be calculated on the basis of a 360-day year consisting of
twelve 30-day months. 
 With the consent of the Company and to the extent permitted by and as
provided in the Indenture, the rights and obligations of the Company or of the holders of the Series YYY Bonds, or the terms and provisions of the Indenture or of any indentures supplemental thereto, may be modified or altered by the affirmative
vote of the holders of the percentage of principal amount of bonds required by the Indenture; provided, however, that without the consent of the holder hereof no such modification or alteration shall permit, among other things, the reduction
of the principal or premium, if any, or the extension of the maturity of the principal of this bond, or the reduction of the rate of interest hereon, or any other modification of the terms of payment of such principal or premium, if any, or
interest. 
 The Company, the Trustee, any paying agent, any registrar, and any depositary may deem and treat the person in whose name this
bond is registered as the absolute owner hereof for the purpose of receiving payment of or on account of the principal hereof and premium, if any, and interest hereon and for all other purposes and shall not be affected by any notice to the
contrary. 
 Prior to September 15, 2051 (the “Par Call Date”), the Company may redeem the Series YYY Bonds at the
Company’s option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of: 

(1)(a) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date
(assuming the Series YYY Bonds matured on the Par Call Date) on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate
plus 25 basis points less (b) interest accrued to the date of redemption, and 
 (2) 100% of the principal amount of the Series YYY
Bonds to be redeemed, 
 plus, in either case, accrued and unpaid interest thereon to the redemption date. 

On and after the Par Call Date, the Company may redeem the Series YYY Bonds at the Company’s option, in whole or in part, at any time and
from time to time, at a redemption price equal to 100% of the principal amount of the Series YYY Bonds being redeemed, plus accrued and unpaid interest thereon to the redemption date. 

Notwithstanding the foregoing, installments of interest on Series YYY Bonds that are due and payable on any Interest Payment Date falling on
or prior to a redemption date will be payable on that Interest Payment Date to the registered holders thereof as of the close of business on the relevant record date according to the terms of the Series YYY Bonds and the Indenture. 

  
 A-3 

 Notice of any redemption will be mailed at least 30 days, but not more than 60 days, before
the redemption date to each registered holder of the Series YYY Bonds to be redeemed. Once notice of redemption is mailed, the Series YYY Bonds called for redemption will become due and payable on the redemption date and at the applicable redemption
price, plus accrued and unpaid interest to the redemption date, provided that the Company may rescind any notice of redemption by notice given not less than five days prior to the proposed redemption date. Redemption will not be conditional upon
receipt by the Trustee of monies sufficient to pay the redemption price. 
 Unless the Company defaults in payment of the redemption price,
on and after the redemption date interest will cease to accrue on the Series YYY Bonds or portions thereof called for redemption. The Company will pay the redemption price and any accrued interest once the Series YYY Bonds are surrendered for
redemption. If only a portion of any Series YYY Bond is redeemed, the Trustee will deliver one or more new Series YYY Bonds for the remaining portion without charge. 

“Treasury Rate” means, with respect to any redemption date, the yield determined by the Company in accordance with the
following two paragraphs. 
 The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as
yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third business day (as defined below) preceding the redemption date based upon the yield or yields for the most recent day that
appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily)—H.15” (or any successor designation or
publication) (“H.15”) under the caption “U.S. government securities–Treasury constant maturities–Nominal” (or any successor caption or heading). In determining the Treasury Rate, the Company shall select, as applicable:
(1) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the redemption date to the Par Call Date (the “Remaining Life”); or (2) if there is no such Treasury constant maturity on H.15 exactly
equal to the Remaining Life, the two yields – one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining
Life – and shall interpolate to the Par Call Date on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (3) if there is no such Treasury constant maturity on H.15
shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be
deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the redemption date. As used in this paragraph and the immediately succeeding paragraph, the term “business
day” means any day (other than a Saturday or Sunday) on which banking institutions in The City of New York are not authorized or obligated by law or executive order to remain closed. 

If on the third business day preceding the redemption date H.15 or any successor designation or publication is no longer published, the
Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury
security maturing on, or with a maturity that is closest to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity
date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding
the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these
two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In
determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage
of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places. 

  
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 The Company’s actions and determinations in determining the redemption price shall be
conclusive and binding for all purposes, absent manifest error. The Company will notify the Trustee of the redemption price promptly after the calculation thereof and the Trustee shall have no duty or obligation with respect to calculation of the
redemption price. 
 In the event that the Company elects to redeem only a portion of the outstanding Series YYY Bonds, (a) the Series
YYY Bonds to be redeemed shall be selected as provided in the Indenture and, in the case of Series YYY Bonds represented by a Global Security (as defined in the Seventy-Third Supplemental Indenture), in accordance with the procedures of The
Depository Trust Company (or its successor as depositary) and (b) in the case of any Series YYY Bond being redeemed in part, the principal amount redeemed must be $1,000 or an integral multiple of $1,000 and the remaining principal amount must
be an authorized denomination. 
 As more fully provided in and subject to the provisions of the Indenture, the Company will redeem the
Series YYY Bonds in the event of the sale, release, taking by eminent domain or purchase by public authority of property constituting or including all or substantially all of the electric distribution system of the Company in the City of San Diego,
all as more fully provided in the second paragraph of Section 13 of Article XI of the Indenture, in which event the Company will redeem Series YYY Bonds (in the principal amount determined pursuant to the second paragraph of Section 13 of
Article XI of the Indenture) at a redemption price equal to 100% of the principal amount of the Series YYY Bonds being redeemed, plus accrued and unpaid interest on the Series YYY Bonds being redeemed to the applicable redemption date. 

This bond is transferable as prescribed in the Indenture by the registered owner hereof in person, or by his duly authorized attorney, at the
office or agency maintained by the Company for that purpose (initially the corporate trust office of the Trustee) in the City and County of Los Angeles, State of California, and, if Series YYY Bonds are issued in definitive certificated form under
the circumstances set forth in clause (2) of Section 4 of Article I of the Seventy-Third Supplemental Indenture, at the office or agency maintained by the Company for such purpose in the Borough of Manhattan, City and County of New York,
State of New York, upon surrender and cancellation of this bond and thereupon a new registered bond or bonds of the same series of authorized denominations and of a like aggregate principal amount, will be issued to the transferee in exchange
herefor as provided in the Indenture, upon payment of any tax or taxes or other governmental charges required to be paid by the Company by reason of such transfer. 

The registered owner of any Series YYY Bond, at the option of such holder, may surrender the same, accompanied by a written instrument of
transfer in form approved by the Company duly executed by the registered owner, at the office or agency maintained by the Company for that purpose (initially the corporate trust office of the Trustee) in the City and County of Los Angeles, State of
California and, if Series YYY Bonds are issued in definitive certificated form under the circumstances set forth in clause (2) of Section 4 of Article I of the Seventy-Third Supplemental Indenture, at the office or agency maintained by the
Company for such purpose in the Borough of Manhattan, City and County of New York, State of New York, for cancellation in exchange for another or other registered bonds of the said series of higher or lower authorized denominations of an aggregate
principal amount equal to the aggregate principal amount of the bond or bonds so surrendered and bearing interest as provided in Section 9 of Article II of the Indenture, and upon payment of any tax or taxes or other governmental charges
required to be paid by the Company by reason of such exchange and subject to the terms and conditions specified in the Indenture, and thereupon the Company shall execute and deliver to the Trustee and the Trustee shall authenticate and deliver such
other bonds to such registered owner at its office or at such office or agency of the Company, at the option of such registered owner. 
 No
recourse shall be had for the payment of the principal of (or premium, if any) or the interest on this bond, or any part thereof, or of any claim based hereon or in respect hereof or of said Indenture, against any incorporator, or any past or future
stockholder, officer or director, as such, of the Company or of any predecessor or successor corporation, either directly or through the Company, or through any such predecessor or successor corporation, or through any receiver or a trustee in
bankruptcy, whether by virtue of any constitution, statute or rule of law or by the enforcement of any assessment or penalty or otherwise, all such liability being, by the acceptance hereof and as part of the consideration for the issue hereof,
expressly waived and released, as more fully provided in the Indenture. 
 In any case where any Interest Payment Date, any redemption date
or the final maturity date of the Series YYY Bonds shall not be a Business Day at any Place of Payment (as those terms are defined in the next sentence), then payment of the principal, premium, if any, and interest due on such Interest Payment Date,
redemption date or 

  
 A-5 

 
final maturity date, as the case may be, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment with the same force
and effect as if made on such Interest Payment Date, redemption date or final maturity date, as the case may be, and, in that case, no interest will accrue on the amount payable for the period from and after such Interest Payment Date, redemption
date or final maturity date, as the case may be. As used in the immediately preceding sentence, “Place of Payment” means the City and County of Los Angeles, State of California and any other place or places where the Company may from time
to time maintain an office or agency where Series YYY Bonds may be presented for payment, and “Business Day,” when used with respect to any Place of Payment, means a day other than (i) a Saturday or a Sunday or (ii) a day on
which banking institutions in that Place of Payment are authorized or obligated by law or executive order to remain closed. 
 This Series
YYY Bond shall be governed by and construed in accordance with the laws of the State of California, without regard (to the extent permitted by applicable law) to conflicts of laws principles thereof. 

************** 
 This bond is one
of the bonds of the series designated therein, described in the within-mentioned Indenture. 
 U.S. BANK NATIONAL ASSOCIATION, As Trustee 

 

	
	By: _________________________________
	Authorized Officer

 Date of Authentication: ______________________________ 

  
 A-6

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