DYNEGY INC /IL/
424B5, 2000-04-19
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>

                                                Filed Pursuant to Rule 424(B)(5)
PROSPECTUS SUPPLEMENT                           Registration No. 333-31394
(To Prospectus dated March 23, 2000)                             333-31394-01
                                8,500,000 Shares

                                  DYNEGY INC.    [Dynegy Inc. Logo Appears Here]


                              Class A Common Stock


- --------------------------------------------------------------------------------

Of the 8,500,000 shares of our Class A common stock offered hereby, we are
offering 3,325,000 shares and our selling shareholders are offering 5,175,000
shares. We will not receive any of the proceeds from the sale of shares by our
selling shareholders.

Our Class A common stock is listed on the New York Stock Exchange under the
symbol "DYN." On April 17, 2000, the last reported sale price on the New York
Stock Exchange was $55.6875 per share.

Pursuant to a shareholder agreement between Chevron U.S.A. Inc. and us, Chevron
has exercised its preemptive right to retain its proportionate interest in our
equity value following this offering. To satisfy this right, we are offering
1,293,055 shares of our Class B common stock to Chevron in a private placement.
The closing of the private placement will be conditioned upon, among other
things, the completion of this public offering.

<TABLE>
<CAPTION>
                                                             Per
                                                            Share     Total
                                                           ------- ------------
<S>                                                        <C>     <C>
Public Offering Price..................................... $ 55.00 $467,500,000
Underwriting Discount..................................... $ 1.925 $ 16,362,500
Proceeds to Dynegy before expenses........................ $53.075 $176,474,375
Proceeds to Selling Shareholders.......................... $53.075 $274,663,125
</TABLE>

We have granted the underwriters of this offering the right to purchase up to
1,100,000 additional shares of Class A common stock within 30 days to cover any
over-allotments. Chevron will also be entitled to maintain its proportionate
interest in our equity value if the underwriters exercise their over-allotment
option.

Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if
this prospectus supplement or the accompanying prospectus is truthful or
complete. Any representation to the contrary is a criminal offense.

Lehman Brothers expects to deliver the shares to purchasers on or about April
24, 2000.

- --------------------------------------------------------------------------------

Lehman Brothers                                             Goldman, Sachs & Co.
         ABN AMRO Rothschild
         a division of ABN AMRO Incorporated
                       Banc of America Securities LLC
                                CIBC World Markets
                                         Credit Suisse First Boston
                                                 Merrill Lynch & Co.
                                                        PaineWebber Incorporated

April 17, 2000
<PAGE>

   You should rely only on the information contained or incorporated by
reference in this prospectus supplement and the accompanying prospectus. No one
has been authorized to provide you with different information. You should not
assume that the information contained in this prospectus supplement or the
accompanying prospectus is accurate as of any date other than the date on the
front cover of the document. We are offering to sell, and seeking offers to
buy, shares of our Class A common stock only in jurisdictions where offers and
sales are permitted.

                               TABLE OF CONTENTS

                             Prospectus Supplement

<TABLE>
<S>                                                                        <C>
Where You Can Find More Information......................................   S-3
The Company..............................................................   S-4
Forward-Looking Statements...............................................   S-7
The Common Stock Offering................................................   S-8
Use Of Proceeds..........................................................   S-8
Price Range Of Class A Common Stock......................................   S-9
Capitalization...........................................................  S-10
Selected Financial Data..................................................  S-11
Selling Shareholders.....................................................  S-12
Underwriting.............................................................  S-13
Legal Matters............................................................  S-15
Experts..................................................................  S-15

                                   Prospectus

About This Prospectus....................................................     1
Where You Can Find More Information......................................     1
Uncertainty of Forward-Looking Statements................................     3
The Company..............................................................     4
The Trust................................................................     4
Use of Proceeds..........................................................     6
Ratios of Earnings to Fixed Charges......................................     6
Description of Debt Securities...........................................     7
Description of the Preferred Securities..................................    19
Description of Trust Debentures..........................................    31
Description of Guarantee.................................................    39
Relationship Among the Preferred Securities, the Trust Debentures and the
 Guarantee...............................................................    42
Description of Common Stock and Preferred Stock..........................    44
Description of Depositary Shares.........................................    48
Description of Securities Warrants.......................................    50
Selling Shareholders.....................................................    51
Plan of Distribution.....................................................    52
Validity of Securities...................................................    53
Experts..................................................................    54
</TABLE>

                                      S-2
<PAGE>

                      WHERE YOU CAN FIND MORE INFORMATION

   We file annual, quarterly and special reports, proxy statements and other
information with the Securities and Exchange Commission (the "SEC"). Our SEC
filings are available to the public over the Internet at the SEC's web site at
http://www.sec.gov. You may also read and copy any document we file with the
SEC at its public reference rooms in Washington, D.C., New York, New York and
Chicago, Illinois. Please call the SEC at 1-800-SEC-0330 for further
information on the public reference rooms. Our filings with the SEC are also
available at the office of the New York Stock Exchange, Inc., 20 Broad Street,
New York, New York 10002. For more information on obtaining copies of our
public filings at the New York Stock Exchange, you should call (212) 656-5060.

   The SEC allows us to "incorporate by reference" the information we file with
them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus, and information that we file later with
the SEC will automatically update and supersede this information. We
incorporate by reference the documents listed below and any future filings made
with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange
Act of 1934 until all of the securities described in this prospectus are sold.

  . The description of our Class A common stock contained in our Registration
    Statement on Form 8-A, as filed with the SEC on February 2, 2000;

  . Our Annual Report on Form 10-K for the fiscal year ended December 31,
    1999; and

  . Our Current Reports on Form 8-K filed with the SEC on January 6, 2000,
    February 2, 2000, February 29, 2000, March 17, 2000 and April 4, 2000.

   You may request a copy of these filings (other than an exhibit to a filing
unless that exhibit is specifically incorporated by reference into that filing)
at no cost, by writing or telephoning us at the following address:

                                  Dynegy Inc.
                           1000 Louisiana, Suite 5800
                              Houston, Texas 77002
                         Attention: Investor Relations
                                 (713) 507-6466

                                      S-3
<PAGE>

                                  THE COMPANY

   We are a leading provider of energy products and services in North America,
the United Kingdom and in continental Europe. Our wholesale marketing
operations market natural gas, electricity, coal, emissions, natural gas
liquids, crude oil, liquid petroleum gas and related services. These wholesale
marketing operations are supported by our ownership or control of an extensive
asset base and transportation network that includes unregulated power
generation, gas and liquids storage capacity, gas, power and liquids
transportation capacity and gas gathering, processing and fractionation assets.

   On February 1, 2000, we completed our merger with Illinova Corporation, the
parent company of Illinois Power. Illinois Power is a combined electric/gas
utility with approximately 650,000 retail customers in Illinois. The Illinova
merger added approximately 3,800 gross megawatts of unregulated generation
capacity to our existing domestic portfolio.

   We believe we are uniquely positioned to capitalize on new opportunities
that are being created by energy convergence and the deregulation of the U.S.
energy market. As a highly integrated company, we believe that we are poised to
compete effectively across the energy convergence chain--from electric
generation to wholesale and retail marketing and trading of power and gas.
Following the merger, we have more than $12 billion in assets and expect to
generate annual revenues in excess of $20 billion. We average worldwide natural
gas sales of approximately 10 billion cubic feet per day, serve more than 1.4
million retail customers and own interests in power plants with more than
12,000 megawatts of gross capacity.

   We have a proven history of strategic, value-added acquisitions beginning
with the acquisition of Trident NGL Holding in 1995 and the acquisition of
Chevron's mid-stream natural gas business in 1996. Chevron remains our largest
shareholder with an approximate 28% ownership interest, and we market
substantially all of the natural gas produced by Chevron in the continental
United States. In 1997, we acquired Destec Energy, Inc., a leading independent
power producer and developer.

   Each of our acquisitions contributed significant expertise to our operations
as well as physical assets and further enabled us to capitalize on the energy
convergence and deregulation trends in North America and Europe. Consistent
with our corporate strategy, we expect to continue to explore opportunities to
make value-added acquisitions.

   Our results of operations are currently reported under three segments--
Energy Convergence; Midstream; and Transmission and Distribution.

   Energy Convergence. Our energy convergence segment consists of our wholesale
power and gas businesses, which include power and gas marketing and trading and
power generation. We are one of the largest wholesale marketers of power and
gas and one of the largest owners/operators of merchant generation capacity in
North America. During the year ended December 31, 1999, we marketed
approximately 10 billion cubic feet of natural gas per day worldwide and 66
million megawatts of power. At the end of March 2000, we had interests in 34
domestic power projects in operation, under construction or in late stage
planning with total gross generation capacity approximating 12,300 megawatts
and net generation capacity approximating 9,500 megawatts. This portfolio
includes 26 projects (8,700 gross megawatts) in operation, 5 projects (2,100
gross megawatts) under construction, and 3 projects (1,500, gross megawatts) in
late stage planning. Our domestic generation asset base is diversified by
geographic location, contract structure and fuel and dispatch type.

                              Geographic Location

<TABLE>
<CAPTION>
                                                                      % of Gross
                                                                       Capacity
                                                                      ----------
      <S>                                                             <C>
      California (WSCC)..............................................    22%
      Texas (ERCOT)..................................................    17%
      Midwest (ECAR & MAIN)..........................................    47%
      Southeast (SERC)...............................................    13%
      Other Areas....................................................     1%
</TABLE>


                                      S-4
<PAGE>

                               Contract Structure

<TABLE>
<CAPTION>
                                                                      % of Gross
                                                                       Capacity
                                                                      ----------
      <S>                                                             <C>
      Merchant.......................................................    59%
      Power Purchase Agreements......................................    41%
</TABLE>

                                   Fuel Type

<TABLE>
<CAPTION>
                                                                      % of Gross
                                                                       Capacity
                                                                      ----------
      <S>                                                             <C>
      Gas-Fired......................................................    61%
      Coal-Fired.....................................................    36%
      Other..........................................................     3%
</TABLE>

                                 Dispatch Type

<TABLE>
<CAPTION>
                                                                      % of Gross
                                                                       Capacity
                                                                      ----------
      <S>                                                             <C>
      Baseload.......................................................    29%
      Intermediate/Peaking...........................................    71%
</TABLE>

   We also commercially manage approximately 11,000 megawatts of additional
generation capacity in California, Texas, the Midwest and the Southeast.

   We view our power and gas marketing and power generation businesses as an
integrated unit. Ownership or control of merchant generation, or "Btu
Conversion" capacity, when coupled with our national wholesale power and gas
marketing franchise, creates a wide range of opportunities benefiting both the
company and its customers. Our wholesale marketing and trading franchise
complements our generation assets by providing national market access, market
intelligence and infrastructure, risk management and arbitrage opportunities
and fuel management, procurement and transmission expertise for inputs (gas and
coal) and outputs (power). Generation capacity adds value to our wholesale
marketing and trading franchise by providing an outlet/market for gas and coal
supplies, a source of reliable power supply and an enhanced ability to
structure innovative new products and services for customers. We refer to our
ability to extract incremental value from the national market by integrating
merchant generation capacity with our power and natural gas franchise as the
"Merchant Leverage Effect."

   We are currently implementing a four-part strategy to expand our existing
generation portfolio. First, we are seeking to acquire safe and affordable
unregulated generation assets that are being sold by electric utilities.
Second, we are developing new natural gas-fired merchant power plants that are
principally simple-cycle peaking facilities, which are designed to respond
quickly to market demand. Third, we are executing contracts to purchase power
from other power plants, developers and operators. By doing so, we can further
diversify our generation portfolio without investing capital in the underlying
generation assets. The final element of our generation expansion strategy
involves the management of third-party assets. Increasingly, electric utilities
will be required to separate their generation assets from their transmission
and distribution facilities. As these assets are separated and become subject
to competitive market pressures, we expect to provide management services to
those companies that recognize a need to be aligned with a national energy
merchant.

   We believe that the Internet has created significant opportunities for cost
efficiencies and market expansion of our wholesale marketing and trading
business and we intend to actively participate in the e-commerce aspects of
these businesses. E-commerce also represents a potential for improved speed of
execution, greater access to price information for us and our customers and a
more seamless approach to national markets. While we believe that the
developments relating to the Internet and e-commerce will be positive, the
changes that result from the Internet and electronic commerce could adversely
affect the profitability of certain of our businesses in the near or long term.

   Midstream. Our midstream segment consists of our North American midstream
liquids operations, natural gas liquids transportation and worldwide marketing
operations. We have interests in 33 gas processing plants,

                                      S-5
<PAGE>

seven natural gas liquids storage facilities, seven natural gas liquids marine
facilities, three fractionation plants and approximately 14,000 miles of
related pipelines. Our transportation fleet--composed of rail cars, trucks,
barges and tankers--delivers products to customers worldwide. With more than
537,000 barrels sold per day during 1999, we are one of the largest marketers
of natural gas liquids in the world.

   Our midstream strategy will continue to include a focus on fee-based
opportunities throughout the liquids value chain, a commitment to efficiency
improvements, supply chain management programs, cost savings alliances and the
effective use of technology. We have strengthened our industry position in this
area by accelerating the consolidation and disposition of processing and
gathering assets that do not complement our strategy or that are located in
areas of declining production. On December 16, 1999, we sold four gas
processing plants and related gathering systems located in East Texas and
Arkansas for approximately $114 million. On March 23, 2000, we sold gathering
systems, processing facilities and transmission pipelines in the mid-continent
region for approximately $308 million. These sales will enable us to redirect
capital into areas of greater strategic focus, to reduce our exposure to
liquids commodity price volatility and to repay portions of our outstanding
debt. Our remaining gathering and processing assets located in the Permian and
Fort Worth Basins and along the Gulf of Mexico complement our midstream
strategy.

   Transmission and Distribution. Our transmission and distribution segment
consists of our regulated utility operations that operate through our Illinois
Power subsidiary. This business segment serves more than 650,000 natural gas
and electric utility customers in a 15,000 square-mile area across Illinois.
Illinois Power has been a leader in developing the comprehensive electric
utility regulatory reform legislation that the state of Illinois passed in
1997. This reform legislation has provided the foundation for our recent
strategic actions, which have been focused on enhancing the operational
flexibility of our transmission and distribution segment. Our first significant
step towards transforming Illinois Power from an integrated utility into a more
focused energy delivery company was to transfer Illinois Power's fossil-fired
generating capacity into an unregulated affiliate. Separating this capacity
into an unregulated subsidiary allows us to augment our existing merchant
leverage capabilities in the wholesale market while continuing Illinois Power's
delivery of service in a reliable and cost-effective manner.

                                      S-6
<PAGE>

                           FORWARD-LOOKING STATEMENTS

   This prospectus supplement and the documents incorporated by reference in
this prospectus supplement contain various forward-looking statements, within
the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the
Securities Exchange Act of 1934, and information that is based on management's
belief as well as assumptions made by and information currently available to
management. When used in this document, words such as "anticipate," "estimate,"
"project," "forecast" and "expect" reflect forward-looking statements. Although
we believe that the expectations reflected in such forward-looking statements
are reasonable, we can give no assurance that such expectations will prove
correct. Such statements are subject to certain risks, uncertainties and
assumptions. Should one or more of these risks or uncertainties materialize, or
should underlying assumptions prove incorrect, actual results may vary
materially from those anticipated, estimated, projected, forecasted or
expected. Among the key risk factors that may have a direct bearing on our
results of operations and financial condition are:

    . competitive practices in the industries in which we compete,
      including the competitive impact of e-commerce and other internet-
      based trading or marketing initiatives;

    . fluctuations in commodity prices for natural gas, electricity,
      natural gas liquids, crude oil or coal;

    . fluctuations in energy commodity prices that could not or have not
      been properly hedged or that are inconsistent with our open position
      in our energy marketing activities;

    . operational and systems risks;

    . environmental liabilities which may not be covered by indemnity or
      insurance;

    . general economic and capital market conditions, including
      fluctuations in interest rates;

    . the impact of current and future laws and governmental regulations
      (particularly environmental regulations) affecting the energy
      industry in general, and our operations in particular; and

    . uncertainties relating to the Illinova merger and any future
      acquisitions, including whether we will be able to successfully
      integrate the new businesses with our existing operations and whether
      we will be able to achieve the expected revenue, cost and other
      benefits.

                                      S-7
<PAGE>

                           THE COMMON STOCK OFFERING

Common stock offered
 By Dynegy................   3,325,000 shares

 By the selling
  shareholders............   5,175,000 shares

  Total..................    8,500,000 shares

Common stock outstanding
 after the offering........  151,483,747 shares(1)

Use of proceeds............  We will receive net proceeds of approximately
                             $244.5 million from this offering and the sale of
                             Class B common stock to Chevron in a private
                             placement, which we intend to use to reduce
                             indebtedness incurred in connection with the
                             Illinova merger.

NYSE symbol................  DYN
- --------
(1)   Does not include up to 1,100,000 shares that may be issued to the
      underwriters pursuant to their over-allotment option and approximately
      11,200,000 shares issuable upon exercise of options outstanding at
      March 31, 2000.

                                USE OF PROCEEDS

   We expect to receive net proceeds of approximately $175.9 million after
deducting the underwriting discount and expenses payable by us (or
approximately $234.3 million, assuming the underwriters exercise their over-
allotment option) in connection with this public offering. In addition, we will
receive proceeds of approximately $68.6 million in connection with the sale of
Class B common stock to Chevron (or approximately $84.9 million, assuming the
underwriters exercise their over-allotment option and Chevron exercises its
preemptive right to retain its proportionate interest in our equity value).

   The net proceeds from this offering and the proceeds from the private
placement to Chevron will be used to reduce indebtedness incurred by us in
connection with the Illinova merger. We will retire commercial paper
borrowings, which had an outstanding balance of approximately $456 million and
a weighted average interest rate of 6.2% as of December 31, 1999.

                                      S-8
<PAGE>

                      PRICE RANGE OF CLASS A COMMON STOCK

   Our Class A common stock, no par value, is listed and traded on the New York
Stock Exchange under the ticker symbol "DYN." The following table sets forth
the high and low closing prices for transactions involving our common stock for
each calendar quarter, as reported on the New York Stock Exchange Composite
Tape, and related dividends paid per common share during such periods. Share
prices in the interim period January 1, 2000 through April 17, 2000 are
adjusted for the .69 to 1 exchange ratio in the merger. Share prices prior to
January 1, 2000 are before application of the merger exchange ratio.

<TABLE>
<CAPTION>
                                                       High     Low    Dividend
                                                      ------- -------- --------
<S>                                                   <C>     <C>      <C>
2000:
  Second Quarter (through April 17, 2000)............ $65.375 $55.6875      --
  First Quarter...................................... $62.734 $ 35.594 $0.04451
1999:
  Fourth Quarter..................................... $24.313 $ 20.375 $ 0.0125
  Third Quarter......................................  24.375   20.250   0.0125
  Second Quarter.....................................  20.750   14.250   0.0125
  First Quarter......................................  15.000   10.250   0.0125
1998:
  Fourth Quarter..................................... $15.250 $ 10.250 $ 0.0125
  Third Quarter......................................  14.063    9.563   0.0125
  Second Quarter.....................................  15.375   12.500   0.0125
  First Quarter......................................  17.250   14.625   0.0125
</TABLE>

   Prior to consummation of the Illinova merger, the holders of our common
stock were entitled to receive dividends if, when and as declared by our board
of directors out of funds legally available therefor. Consistent with our board
of directors' intent to establish a policy of declaring quarterly cash
dividends, a cash dividend of $0.0125 per share was declared and paid in each
quarter during 1999 and 1998. In 2000, we expect to pay annual dividends of
$0.60 per share on our Class A and Class B common stock, subject to the
discretion of our board of directors and the existence of funds legally
available therefor. In February 2000, the board of directors declared a
dividend of $0.04451, payable to the holders of Dynegy's Class A common stock
and Class B common stock, which amount was prorated from the closing of the
merger on February 1, 2000.

                                      S-9
<PAGE>

                                 CAPITALIZATION

   The following table sets forth the short-term debt and capitalization of
Dynegy Inc. as of December 31, 1999, on a historical basis and as adjusted to
give effect to the Illinova merger, the issuance and sale of the Class A common
stock offered hereby and the private placement of Class B common stock to
Chevron and the application of the estimated net proceeds therefrom. The as
adjusted column relating to the offering assumes the conversion by the selling
shareholders of their Series A convertible preferred stock and the sale by the
selling shareholders of 5,175,000 shares of Class A common resulting from such
conversion.

<TABLE>
<CAPTION>
                                                      December 31, 1999
                                              ----------------------------------
                                                         As Adjusted
                                                             for     As Adjusted
                                                          Illinova     for the
                                              Historical   Merger     Offerings
                                              ---------- ----------- -----------
                                                        (in millions)
<S>                                           <C>        <C>         <C>
Short-term debt and current portion of long-
 term debt..................................   $  191.7   $1,069.3    $  824.8
                                               ========   ========    ========
Long-term debt..............................   $1,333.9   $3,932.8    $3,932.8
Company Obligated Preferred Securities of
 Subsidiary Trust...........................      200.0      439.2       439.2
Stockholders' equity:
  Preferred Stock, $0.01 par value,
   50,000,000 shares authorized; 8,000,000
   shares designated as Series A
   Participating Preferred Stock, 7,815,363
   shares issued and outstanding at December
   31, 1999; none outstanding as adjusted...       75.4         --          --
  Preferred Stock, no par value, 70,000,000
   shares authorized; 6,697,776 shares
   designated as Series A Convertible
   Preferred Stock in the Illinova merger;
   none outstanding as adjusted for the
   offering.................................         --       61.0          --
  Class A Common Stock, no par value,
   300,000,000 authorized; 109,669,442 as
   adjusted for the offering................         --    1,115.7     1,352.6
  Class B Common Stock, no par value,
   120,000,000 authorized; 41,814,305 as
   adjusted(1)..............................         --      648.1       716.7
  Common Stock, $0.01 par value, 400,000,000
   shares authorized, 157,499,001 shares
   issued at December 31, 1999..............        1.6         --          --
  Additional paid-in capital................      973.0         --          --
  Retained earnings.........................      277.1      277.1       277.1
  Less: treasury stock, at cost: 1,200,700
   shares at December 31, 1999..............      (17.6)        --          --
                                               --------   --------    --------
    Total stockholders' equity..............    1,309.5    2,101.9     2,346.4
                                               --------   --------    --------
      Total capitalization..................   $2,843.4   $6,473.9    $6,718.4
                                               ========   ========    ========
</TABLE>
- --------
(1) Includes 1,293,055 shares of Class B common stock to be sold to Chevron in
    a private placement.

                                      S-10
<PAGE>

                            SELECTED FINANCIAL DATA

   The following table sets forth selected financial data of Dynegy Inc. for
each of the periods indicated. This information should be read in conjunction
with the consolidated financial statements and related notes incorporated by
reference herein from our Annual Report on Form 10-K for the fiscal year ended
December 31, 1999 and the unaudited pro forma financial information and related
notes included in our Current Report on Form 8-K filed with the SEC on March
17, 2000. Please read "Where You Can Find More Information."

<TABLE>
<CAPTION>
                                                 Historical                               Pro forma
                          -------------------------------------------------------------  ------------
                                           Year Ended December 31,                        Year Ended
                          -------------------------------------------------------------  December 31,
                             1995        1996        1997         1998         1999          1999
                          ----------  ----------  -----------  -----------  -----------  ------------
                                    (in thousands, except per share data)                (unaudited)
<S>                       <C>         <C>         <C>          <C>          <C>          <C>
Statement of Operations
 Data:
Revenues................  $3,665,946  $7,260,202  $13,378,380  $14,257,997  $15,429,976  $17,654,700
Operating margin........     194,660     369,500      385,294      428,687      543,875    1,253,400
General and
 administrative
 expenses...............      68,057     100,032      149,344      185,708      200,717      356,500
Depreciation and
 amortization expense...      44,913      71,676      104,391      113,202      129,458      352,300
Asset impairment,
 abandonment severance
 and other charges......          --          --      275,000        9,644           --           --
Net income (loss)             92,705     113,322     (102,485)     108,353      151,849      217,800
Earnings (loss) per
 share (EPS)............        0.82        0.83        (0.68)        0.66         0.91          n/a
Pro forma earnings per
 share..................        0.40         n/a          n/a          n/a          n/a         1.35
Shares outstanding for
 EPS computation........     113,176     136,099      150,653      164,605      166,975      143,000
Cash dividends per
 common share...........  $     0.05  $     0.05  $      0.05  $      0.05  $       .05  $      0.60
Cash Flow Data:
Cash flow from operating
 activities.............  $   90,648  $  (30,954) $   278,589  $   250,780  $     8,839          n/a
Cash flows from
 investment activities..    (310,623)   (111,140)    (510,735)    (295,082)    (318,664)         n/a
Cash flows from
 financing activities...     221,022     176,037      204,984       49,622      326,688          n/a
Other Financial Data:
EBITDA(1)...............  $  142,538  $  289,023  $   291,899  $   363,517  $   450,780  $ 1,028,600
Dividends or
 distributions to
 partners, net..........       9,253       6,740        7,925        7,988        8,115          n/a
Capital expenditures,
 acquisitions
 and investments........     979,603     859,047    1,034,026      478,464      448,522          n/a
<CAPTION>
                                                 Historical                               Pro forma
                          -------------------------------------------------------------  ------------
                                                December 31,
                          -------------------------------------------------------------  December 31,
                             1995        1996        1997         1998         1999          1999
                          ----------  ----------  -----------  -----------  -----------  ------------
                                               (in thousands)                            (unaudited)
<S>                       <C>         <C>         <C>          <C>          <C>          <C>
Balance Sheet Data:
Current assets..........  $  762,939  $1,936,721  $ 2,018,780  $ 2,117,241  $ 2,805,080  $ 3,403,900
Current liabilities.....     705,674   1,548,987    1,753,094    2,026,323    2,538,523    3,870,400
Property and equipment,
 net....................     948,511   1,691,379    1,521,576    1,932,107    2,017,881    6,446,400
Total assets............   1,875,252   4,186,810    4,516,903    5,264,237    6,525,171   12,944,600
Long-term debt..........     522,764     988,597    1,002,054    1,046,890    1,333,926    3,932,800
Total equity............     552,380   1,116,733    1,019,125    1,128,063    1,309,482    2,101,900
</TABLE>
- --------
(1) Earnings before interest, taxes, depreciation and amortization ("EBITDA")
    is presented as a measure of our ability to service our debt and to make
    capital expenditures. It is not a measure of operating results and is not
    presented in our consolidated financial statements.

                                      S-11
<PAGE>

                              SELLING SHAREHOLDERS

   The selling shareholders in this offering are British Gas Global Holdings BV
("BG") and NOVA Gas Services (U.S.) Inc. ("NOVA"). The following table sets
forth the number of shares of Class A common stock beneficially owned by the
selling shareholders and being offered for sale by each selling shareholder.

<TABLE>
<CAPTION>
                                              Class A     Class A    Class A
                                            Common Stock  Common   Common Stock
                                            Owned Prior    Stock      Owned
                                               to the     Offered   After the
          Selling Shareholder (1)           Offering(2)   Hereby   Offering (3)
          -----------------------           ------------ --------- ------------
<S>                                         <C>          <C>       <C>
British Gas Global Holdings BV.............  3,227,532   2,587,500   640,032
  100 Thames Valley Park Drive
  Reading, Berkshire RG6 1PT


NOVA Gas Services (U.S.) Inc...............  3,227,532   2,587,500   640,032
  1550 Coraopolis Heights Road
  Moon Township, Pennsylvania 15108
</TABLE>
- --------
(1) On March 16, 2000, Dynegy Inc., BG and NOVA executed a letter agreement
    whereby BG and NOVA agreed to convert their respective shares of Series A
    Convertible Preferred Stock to shares of Dynegy Inc.'s Class A common
    stock. In consideration of the difference between the fair market value of
    the Series A Convertible Preferred Stock and the fair market value of the
    underlying Class A common stock and their agreement to participate in this
    offering, Dynegy Inc. agreed to pay each of BG and NOVA $4.75 in cash, upon
    consummation of this offering, for each share of Series A Convertible
    Preferred Stock they convert.
(2) Represents shares of Class A common stock issuable upon conversion of the
    Series A Convertible Preferred Stock held by each selling shareholder.
(3) Each selling shareholder will own less than one percent of the total
    outstanding shares of Class A common stock following this offering.

                                      S-12
<PAGE>

                                  UNDERWRITING

   Under an underwriting agreement, Lehman Brothers Inc. and Goldman, Sachs &
Co. are acting as lead managers and, together with Banc of America Securities
LLC, CIBC World Markets Corp., Credit Suisse First Boston Corporation, Merrill
Lynch, Pierce, Fenner & Smith Incorporated, ABN AMRO Incorporated and
PaineWebber Incorporated, as representatives of the underwriters named below.
Under the underwriting agreement each of the underwriters has agreed to
purchase from us and the selling shareholders the respective number of shares
of Class A common stock shown opposite its name below:

<TABLE>
<CAPTION>
                                                                Number of Shares
                                                                   of Class A
      Underwriters                                                Common Stock
      ------------                                              ----------------
      <S>                                                       <C>
      Lehman Brothers Inc. ....................................    1,534,000
      Goldman, Sachs & Co. ....................................    1,192,000
      Banc of America Securities LLC ..........................      816,000
      CIBC World Markets Corp. ................................      816,000
      Credit Suisse First Boston Corporation ..................      816,000
      Merrill Lynch, Pierce, Fenner & Smith
              Incorporated ....................................      816,000
      ABN AMRO Incorporated ...................................      408,000
      PaineWebber Incorporated ................................      408,000
      Credit Lyonnais Securities (USA) Inc. ...................      154,000
      Dain Rauscher Incorporated ..............................      154,000
      Deutsche Bank Securities Inc. ...........................      154,000
      Fidelity Capital Markets
       a division of National Financial Services Corp. ........      154,000
      FleetBoston Robertson Stephens Inc. .....................      154,000
      Jefferies & Company, Inc. ...............................      154,000
      Morgan Stanley & Co. Incorporated .......................      154,000
      Petrie Parkman & Co., Inc. ..............................      154,000
      Prudential Securities Incorporated ......................      154,000
      Salomon Smith Barney Inc. ...............................      154,000
      Simmons & Company International .........................      154,000
                                                                   ---------
          Total................................................    8,500,000
                                                                   =========
</TABLE>

   The underwriting agreement provides that the underwriters' obligations to
purchase shares of the Class A common stock depend on the satisfaction of the
conditions contained in the underwriting agreement, and that if any of the
shares of Class A common stock are purchased by the underwriters under the
underwriting agreement, all of the shares of Class A common stock that the
underwriters have agreed to purchase under the underwriting agreement must be
purchased. The conditions contained in the underwriting agreement include the
condition that all the representations and warranties made by us to the
underwriters are true, that there has been no material adverse change in our
condition or in the financial markets and that we deliver to the underwriters
customary closing documents.

   The following table shows the underwriting fees to be paid to the
underwriters by us and the selling shareholders in connection with this
offering. These amounts are shown assuming both no exercise and full exercise
of the underwriters' option to purchase additional shares of Class A common
stock. This underwriting fee is the difference between the initial price to
public and the amount the underwriters pay to us to purchase the shares from
us. On a per share basis, the underwriting fee is 3.5% of the initial price to
public.

<TABLE>
<CAPTION>
                                                              No        Full
                                                           Exercise   Exercise
                                                          ---------- ----------
      <S>                                                 <C>        <C>
      Per share.......................................... $    1.925 $    1.925
      Total paid by Dynegy Inc........................... $6,400,625 $8,518,125
      Total paid by the selling shareholders............. $9,961,875 $9,961,875
</TABLE>

   We and the selling shareholders have been advised by the representatives
that the underwriters propose to offer the Class A common stock directly to the
public at the public offering price set forth on the cover page of

                                      S-13
<PAGE>

this prospectus supplement and to dealers (who may include the underwriters) at
this initial public offering price less a concession not in excess of $1.15 per
share. The underwriters may allow, and the dealers may reallow, a concession
not in excess of $0.10 per share to certain brokers and dealers. After the
offering, the underwriters may change the offering price and other selling
terms.

   We and the selling shareholders have agreed to indemnify the underwriters
against certain liabilities, including liabilities under the Securities Act, or
to contribute to payments that may be required to be made in respect thereof.

   We estimate that total expenses payable by us in connection with this
offering, excluding underwriting discounts and commissions, will be
approximately $600,000.

   We have granted to the underwriters an option to purchase up to an aggregate
of 1,100,000 additional shares of Class A common stock at the public offering
price less the underwriting discounts and commissions set forth on the cover of
this prospectus supplement exercisable to cover any over-allotments. Such
option may be exercised at any time until 30 days after the date of the
underwriting agreement. If this option is exercised, each underwriter will be
committed, subject to satisfaction of the conditions specified in the
underwriting agreement, to purchase a number of additional shares of Class A
common stock proportionate to such underwriter's initial commitment as
indicated in the preceding table, and we will be obligated, pursuant to such
option, to sell such shares of Class A common stock to the underwriters.

   We, the selling shareholders and certain of our executive officers have
agreed, for a period of 90 days from the date of this prospectus supplement,
not to, directly or indirectly, offer, sell or otherwise dispose of any shares
of Class A common stock or any securities convertible into or exchangeable or
exercisable for any such shares of Class A common stock or enter into any
derivative transaction with similar effect as a sale of Class A common stock,
without the prior written consent of the lead managers. The restrictions
described in this paragraph do not apply to (a) the sale of Class A common
stock to the underwriters, (b) the potential sale of shares of our capital
stock to Chevron, (c) shares of Class A common stock issued by us under
employee incentive plans or upon the exercise of options issued under employee
incentive plans, (d) the potential sale of up to 1,000,000 shares of Class A
common stock in the aggregate by certain of our executive officers or (e)
shares of Class A common stock issued by us in connection with acquisitions.

   In connection with this offering, the representatives may purchase and sell
our Class A common stock in the open market. These transactions may include
short sales, stabilizing transactions and purchases to cover positions created
by short sales. Short sales involve the sale by the representatives of a
greater amount of Class A common stock than they are required to purchase from
us, and in such case the representatives may purchase Class A common stock in
the open market following completion of the offering to cover all or a portion
of their short position. The representatives may also cover all or a portion of
such short position in the Class A common stock by exercising the underwriters'
over-allotment option referred to above. Stabilizing transactions consist of
certain bids or purchases made for the purpose of preventing or retarding a
decline in the market price of our Class A common stock while this offering is
in progress. In addition, the representatives may impose penalty bids. This
occurs when a particular underwriter repays to the representatives a portion of
the underwriting discount received by it because the representatives have
repurchased Class A common stock sold by or for the account of that underwriter
in stabilizing or short-covering transactions. Any of the activities by the
representatives described in this paragraph may stabilize, maintain or
otherwise affect the market price of our Class A common stock. As a result, the
price of our Class A common stock may be higher than the price that otherwise
might exist in the open market. The representatives may effect these
transactions on the NYSE, in the over-the-counter market or otherwise. If these
activities are commenced, they may be discontinued by the representatives at
any time without notice.

   Some of the underwriters or their affiliates have from time to time provided
investment banking, financial advisory, trustee and lending services to us and
our affiliates in the ordinary course of business, for which they have received
customary fees, and they may continue to do so.

                                      S-14
<PAGE>

   This prospectus supplement and the accompanying prospectus are not, and
under no circumstances are to be construed as, an advertisement or a public
offering of the shares in Canada or any province or territory thereof. Any
offer or sale of shares in Canada will be made only under an exemption from the
requirements to file a prospectus and an exemption from the dealer registration
requirement in the relevant province or territory of Canada in which such offer
or sale is made.

                                 LEGAL MATTERS

   Certain legal matters with respect to the Class A common stock will be
passed upon for us by Vinson & Elkins L.L.P., Houston, Texas, and for the
underwriters by Baker Botts L.L.P., Houston, Texas.

                                    EXPERTS

   The audited consolidated financial statements and schedules of Dynegy Inc.
and its subsidiaries, incorporated by reference in this prospectus supplement
and elsewhere in the registration statement, have been audited by Arthur
Andersen LLP, independent public accountants, as indicated in their report with
respect thereto, and are incorporated herein in reliance upon the authority of
said firm as experts in accounting and auditing in giving said report.

   The audited historical consolidated financial statements of Illinova
Corporation incorporated in this Prospectus Supplement by reference to Dynegy
Inc.'s Current Report on Form 8-K dated March 17, 2000, which included
Illinova's audited historical consolidated financial statements for the year
ended December 31, 1999, on pages 3 through 44, have been so incorporated in
reliance on the report (which contains explanatory paragraphs that describe the
merger of Illinova and Dynegy Inc. in Note 16, discussions of the commitment to
exit nuclear operations and the resulting impairment of the Clinton Power
Station in accordance with Statement of Financial Accounting Standards No. 121,
"Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets
to Be Disposed Of," Illinova's quasi-reorganization effective December 1998 and
Illinova's adoption of Statement of Financial Accounting Standards No. 133,
"Accounting for Derivatives and Hedging Activities" and Emerging Issues Task
Force Statement 98-10, "Accounting for Energy Trading and Risk Management
Activities," all as discussed in Note 3, and Illinova's discontinued use of
Statement of Financial Accounting Standards No. 71, "Accounting for the Effects
of Certain Types of Regulation," for its generation segment of the business,
discussed in Note 1 to the audited historical consolidated financial
statements) of PricewaterhouseCoopers LLP, independent accountants, given on
the authority of said firm as experts in auditing and accounting.

                                      S-15
<PAGE>

PROSPECTUS
                                              [LOGO OF DYNEGY INC. APPEARS HERE]

                                  DYNEGY INC.
                                Debt Securities
                                Preferred Stock
                               Depositary Shares
                              Class A Common Stock
                              Securities Warrants
                                Trust Debentures

                            DYNEGY CAPITAL TRUST III

                           Trust Preferred Securities
                           Guaranteed by Dynegy Inc.
                               ----------------

   Dynegy Inc. may offer and sell, from time to time:

  . debt securities;

  . shares of preferred stock, which may be issued as depositary shares
    evidenced by depositary receipts;

  . shares of Class A common stock;

  . warrants to purchase debt securities, preferred stock or Class A common
    stock;

  . trust debentures to be purchased by Dynegy Capital Trust III; or

  . a guarantee of preferred securities sold by Dynegy Capital Trust III.

Dynegy Capital Trust III may offer and sell, from time to time, preferred
securities representing undivided beneficial interests in the assets of the
trust. The aggregate initial public offering prices of the securities offered
by Dynegy Inc. and Dynegy Capital Trust III will not exceed $500,000,000.

   The selling shareholders may offer and sell, from time to time, up to
6,455,064 shares of Class A common stock of Dynegy Inc. Dynegy Inc. will not
receive any proceeds from the sale of shares by the selling shareholders.

   This prospectus provides you with a general description of the securities
which may be offered. Each time securities are sold we will provide a
supplement to this prospectus that contains specific information about the
offering and the terms of the securities. The supplement may also add, update
or change information contained in this prospectus. You should carefully read
this prospectus and any supplement before you invest in any of our securities.

   The Class A common stock of Dynegy Inc. is listed on the New York Stock
Exchange under the symbol "DYN."
                               ----------------

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                               ----------------

                    This Prospectus is dated March 23, 2000
<PAGE>

                             ABOUT THIS PROSPECTUS

   This prospectus is part of a "shelf" registration statement that we filed
with the Securities and Exchange Commission. By using a shelf registration
statement, we may, over time, sell any combination of the securities described
in this prospectus in one or more offerings up to a total dollar amount of
$500,000,000. In addition, two selling shareholders may sell a specified number
of shares of our Class A common stock as described elsewhere in this
prospectus. This prospectus provides you with a general description of the
securities we may offer. Each time securities are sold hereunder, we will
provide a prospectus supplement that will contain specific information about
the terms of that offering. The prospectus supplement may also add, update or
change information contained in this prospectus. You should read both this
prospectus and any prospectus supplement together with additional information
described under the heading "Where You Can Find More Information."

   You should rely only on the information contained or incorporated by
reference in this prospectus and in any supplement. We have not authorized any
other person to provide you with different information. If anyone provides you
with different or inconsistent information, you should not rely on it. We will
not make an offer to sell these securities in any jurisdiction where the offer
or sale is not permitted. You should assume that the information appearing in
this prospectus and the supplement to this prospectus is accurate only as of
the dates on their covers.

                      WHERE YOU CAN FIND MORE INFORMATION

   We file annual, quarterly and special reports, proxy statements and other
information with the SEC. Our SEC filings are available to the public over the
Internet at the SEC's web site at http://www.sec.gov. You may also read and
copy any document we file with the SEC at its public reference rooms in
Washington, D.C., New York, New York and Chicago, Illinois. Please call the SEC
at 1-800-SEC-0330 for further information on the public reference rooms. Our
filings with the SEC are also available at the office of the New York Stock
Exchange. For more information on obtaining copies of our public filings at the
New York Stock Exchange, you should call (212) 656-5060.

   The SEC allows us to "incorporate by reference" the information we file with
them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus, and information that we file later with
the SEC will automatically update and supersede this information. We
incorporate by reference the documents listed below and any future filings made
with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange
Act of 1934 until all of the securities described in this prospectus are sold.

  .  The description of our common stock contained in our Registration
     Statement on Form 8-A, as filed with the SEC on February 2, 2000;

  .  Our Annual Report on Form 10-K for the year ended December 31, 1999; and

  .  Our Current Reports on Form 8-K filed with the SEC on January 6, 2000,
     February 2, 2000, February 29, 2000 and March 17, 2000.

                                       1
<PAGE>

   You may request a copy of these filings (other than an exhibit to a filing
unless that exhibit is specifically incorporated by reference into that filing)
at no cost, by writing or telephoning us at the following address:

                                  Dynegy Inc.
                           1000 Louisiana, Suite 5800
                              Houston, Texas 77002
                         Attention: Investor Relations
                                 (713) 507-6466

   Our web site address is www.dynegy.com. The information on our web site is
not incorporated by reference into this prospectus.

                                       2
<PAGE>

                   UNCERTAINTY OF FORWARD-LOOKING STATEMENTS

   This prospectus, any accompanying prospectus supplement and the additional
information described under the heading "Where You Can Find More Information"
may contain forward-looking statements within the meaning of the Private
Securities Litigation Reform Act of 1995. These statements are subject to risks
and uncertainties and are based on the beliefs and assumptions of our
management, based on information currently available to our management. When we
use words such as "believes," "expects," "anticipates," "intends," "plans,"
"estimates," "should" or similar expressions, we are making forward-looking
statements. Forward-looking statements include the information concerning
possible or assumed future results of operations set forth under "Business" and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" in our Annual Reports on Form 10-K and Form 10-K/A incorporated by
reference into this prospectus.

   Forward-looking statements are not guarantees of performance. They involve
risks, uncertainties and assumptions. Our future results and shareholder value
may differ materially from those expressed in these forward-looking statements.
Many of the factors that will determine these results and value are beyond our
ability to control or predict. These statements are necessarily based upon
various assumptions involving judgments with respect to the future including,
among others:

  . competitive practices in the industries in which Dynegy competes;

  . fluctuations in commodity prices for natural gas, electricity, natural
    gas liquids, crude oil or coal;

  . fluctuations in energy commodity prices which have not been properly
    hedged or which are inconsistent with Dynegy's open position in its
    energy marketing activities;

  . operational and systems risks;

  . environmental liabilities;

  . general economic and capital market conditions, including fluctuations in
    interest rates;

  . the impact of current and future laws and governmental regulations
    (particularly environmental regulations) affecting the energy industry in
    general and Dynegy's operations in particular; and

  . the integration of Dynegy Holdings Inc.'s and Illinova Corporation's
    operations.

   You are cautioned not to put undue reliance on any forward-looking
statements. For those statements, we claim the protection of the safe harbor
for forward-looking statements contained in the Private Securities Litigation
Reform Act of 1995.

   You should also consider any other factors contained in this prospectus or
in any accompanying supplement, including the information incorporated by
reference into this prospectus or into any accompanying supplement.

                                       3
<PAGE>

                                  THE COMPANY

   Dynegy Inc. is a leading provider of energy products and services in North
America and the United Kingdom. Dynegy was created by the combination of Dynegy
Holdings Inc. (formerly Dynegy Inc.) and Illinova Corporation which was
completed on February 1, 2000 and operates through these two subsidiaries.

   Products marketed by Dynegy Holdings' wholesale marketing operations include
natural gas, electricity, coal, natural gas liquids, crude oil, liquid
petroleum gas and related services. Dynegy Holdings' wholesale marketing
operations are supported by ownership or control of an extensive asset base and
transportation network that includes unregulated power generation, gas and
liquids storage capacity, gas, power and liquids transportation capacity and
gas gathering, processing and fractionation facilities.

   Illinova is the holding company for: Illinois Power Company, a regulated
energy delivery company that provides electricity and natural gas service to
approximately 650,000 customers over a 15,000 square-mile area of Illinois;
Illinova Generating Company, which invests in, develops and operates
independent power projects worldwide; and Illinova Energy Partners, Inc., which
markets energy and energy-related services in the United States and Canada.

   Our principal executive office is located at 1000 Louisiana, Suite 5800,
Houston, Texas 77002, and the telephone number is (713) 507-6400.

                                   THE TRUST

   The trust is a statutory business trust created under Delaware law through
the filing of a certificate of trust with the Delaware Secretary of State on
February 2, 2000. The trust's business is defined in a declaration of trust,
dated February 1, 2000, executed by the Company, as sponsor, and the trustees.
The declaration will be amended and restated in its entirety as of the date
preferred securities of the trust are initially issued. The declaration, as
amended and restated, is referred to in this prospectus as the trust agreement.
The trust agreement will be qualified under the Trust Indenture Act of 1939.

   The trust exists for the exclusive purposes of:

  . issuing and selling the preferred securities and common securities;

  . using the proceeds from the sale of the preferred securities and common
    securities to acquire the trust debentures; and

  . engaging in only those other activities necessary or incidental to these
    purposes.

   The trust debentures will be the sole assets of the trust. Accordingly,
payments on the trust debentures will be the sole revenues of the trust. The
trust has a term of 35 years, but may dissolve earlier as provided in the trust
agreement.

   Dynegy will, directly or indirectly, acquire all of the common securities of
the trust, which will have an aggregate liquidation amount equal to at least 3%
of the total capital of the trust.

   The trust's business and affairs will be conducted by its trustees, as set
forth in the trust agreement. At the time of the issuance of the preferred
securities, the trustees for the trust will be initially Bank One Trust
Company, NA, as the property trustee, Bank One Delaware, Inc., as the Delaware
trustee, and three individual trustees, referred to in this prospectus as the
administrative trustees, who are officers of the Company. The property trustee
and the Delaware trustee, together with the administrative trustees, are
collectively referred to as the trustees in this prospectus. The property
trustee will act as sole indenture trustee under the trust

                                       4
<PAGE>

agreement and will also act as indenture trustee under the guarantee and the
debenture indenture. See "Description of Guarantee" and "Description of Trust
Debentures." The holder of the common securities of the trust or, if an event
of default under the trust agreement has occurred and is continuing, the
holders of not less than a majority in liquidation amount of the preferred
securities, will be entitled to appoint, remove or replace the property trustee
and the Delaware trustee. In no event will the holders of the preferred
securities have the right to vote to appoint, remove or replace the
administrative trustees. Such voting rights will be vested exclusively in the
holder of the common securities of the trust.

   For so long as the preferred securities remain outstanding, Dynegy will:

  . maintain directly or indirectly 100% ownership of the common securities;

  . use its reasonable efforts to cause the trust to remain a statutory
    business trust and not to voluntarily dissolve, wind-up, liquidate or be
    terminated, except as permitted by the trust agreement;

  . use its reasonable efforts to ensure that the trust will not be an
    "investment company" for purposes of the Investment Company Act of 1940;

  . use its reasonable efforts to cause the trust to continue to be treated
    as a grantor trust and not an association taxable as a corporation for
    United States federal income tax purposes; and

  . use its reasonable efforts to cause each holder of common securities or
    preferred securities of the trust to be treated as owning an undivided
    beneficial interest in the trust debentures.

   The rights of the holders of the preferred securities are set forth in the
trust agreement and the Delaware Business Trust Act. The location of the
principal executive office of the trust is c/o Dynegy Inc., 1000 Louisiana,
Suite 5800, Houston, Texas 77002, and its telephone number is 713-507-6400.

                                       5
<PAGE>

                                USE OF PROCEEDS

   Except as may otherwise be described in any prospectus supplement relating
to an offering of securities, the net proceeds from the sale of the securities,
including trust debentures issued to the trust in connection with the
investment by the trust of all of the proceeds from its sale of preferred
securities, will be used by Dynegy for general corporate purposes. Any
allocation of the net proceeds of an offering of securities to a specific
purpose will be determined at the time of such offering and will be described
in a prospectus supplement.

   Dynegy will not receive any proceeds from the sale of any shares of Class A
common stock by the selling shareholders.

                      RATIOS OF EARNINGS TO FIXED CHARGES

   The following table sets forth consolidated ratios of earnings to fixed
charges for the entities and periods shown.

<TABLE>
<CAPTION>
                                  Dynegy Inc.
       ----------------------------------------------------------------------------------------------
                           Years Ended December 31,
       ----------------------------------------------------------------------------------------------
       1999            1998                    1997                    1996                    1995
       ----            ----                    ----                    ----                    ----
       <S>             <C>                     <C>                     <C>                     <C>
       2.56             2.23                    (a)                     4.09                    2.48(b)
</TABLE>
- --------
(a) Earnings were inadequate to cover fixed charges for the year ended December
    31, 1997, by approximately $72.9 million.
(b) The computation for 1995 includes the consolidated results of Natural Gas
    Clearinghouse and its subsidiaries for the full year, and of Trident NGL
    Holding, Inc. and its subsidiaries from March 1, 1995, the effective date
    of the merger between Natural Gas Clearinghouse and Trident NGL Holding,
    Inc.

   For purposes of calculating the ratio of earnings to fixed charges, earnings
consist of income before income taxes and fixed charges (excluding capitalized
interest and depreciation of interest previously capitalized) less
undistributed income from equity investees. Fixed charges consist of (i)
interest expense, (ii) amortization of deferred financing costs, (iii) interest
capitalized during the year and (iv) the portion of lease rental expense
representative of the interest factor attributable to such leases.

                                       6
<PAGE>

                         DESCRIPTION OF DEBT SECURITIES

   The debt securities will constitute either senior or subordinated debt of
Dynegy. Senior debt securities will be issued under a senior debt indenture to
be entered into between Dynegy and Bank One Trust Company, NA, as trustee.
Subordinated debt securities will be issued under a subordinated debt indenture
to be entered into between Dynegy and Bank One Trust Company, NA, as trustee.
The senior debt indenture and the subordinated debt indenture are sometimes
collectively referred to in this prospectus as the indentures.

   The following description is a summary of selected provisions relating to
the debt securities and the indenture. The summary is not complete. You should
not rely on this summary, because the indentures and not this summary define
your rights as a holder of the debt securities. When debt securities are
offered in the future, a prospectus supplement will explain the particular
terms of those securities and the extent to which these general provisions may
apply.

   The Company's trust debentures are separately described in this prospectus
under the caption "Description of Trust Debentures."

Provisions Applicable to Both Senior and Subordinated Debt Securities

   General. The debt securities will represent our unsecured senior or
subordinated obligations and may be issued from time to time in one or more
series. The indentures do not limit the amount of debt securities, debentures,
notes or other types of indebtedness that we or any of our subsidiaries may
issue nor do they restrict transactions between us and our affiliates or the
payment of dividends or other distributions by us to our stockholders. In
addition, other than as may be set forth in any prospectus supplement and, in
the case of the senior debt indenture, other than as set forth under "--
Limitation on Liens," the indentures do not and the debt securities will not
contain any covenants or other provisions that are intended to afford holders
of the debt securities special protection in the event of either a change of
control or a highly leveraged transaction involving the Company.

   A prospectus supplement and a supplemental indenture relating to any series
of debt securities offered by the Company will include specific terms relating
to the offering. These terms will include some or all of the following:

  . the title and classification of the debt securities;

  . any rights of the holders of the subordinated debt securities to convert
    the subordinated debt securities into common stock and the terms and
    conditions governing such conversion or exchange;

  . any limit on the total principal amount of the debt securities;

  . the price or prices at which the debt securities will be issued;

  . whether the debt securities are to be issuable as registered securities
    or bearer securities or both;

  . whether any of the debt securities are to be issuable initially in
    temporary global form or permanent global form;

  . the dates on which the debt securities will mature;

  . the interest rate or the method for determining the rate that the debt
    securities will bear and the date from which any interest will accrue;

  . the interest payment dates for the debt securities;

  . any mandatory or optional sinking fund or analogous provisions;

                                       7
<PAGE>

  . the place where we will pay, or the method of payment of, principal,
    premium and interest on the debt securities;

  . any optional redemption periods and prices;

  . the denominations in which we will issue the debt securities that are
    registered securities, if other than $1,000 and any integral multiple
    thereof, and the denominations in which we will issue the debt securities
    that are bearer securities, if other than $5,000 and any integral
    multiple thereof;

  . the currency or currencies in which we will pay principal, premium and
    interest on the debt securities;

  . the manner in which we will determine the amounts of principal, premium
    or interest payments on the debt securities if these amounts may be
    determined by reference to an index or based on a formula;

  . information with respect to book-entry procedures, if any; and

  . any other terms of the debt securities not inconsistent with the
    indentures.

   We may issue debt securities at a discount below their stated principal
amount. Even if we do not issue the debt securities below their stated
principal amount, for United States federal income tax purposes the debt
securities may be deemed to have been issued with a discount because of certain
interest payment characteristics. We will describe in a prospectus supplement
the United States federal income tax considerations applicable to debt
securities issued at a discount or deemed to be issued at a discount. We will
also describe in a prospectus supplement the special United States federal
income tax considerations or other restrictions or terms applicable to debt
securities issuable in bearer form, offered exclusively to foreigners or
denominated in a foreign currency.

   The debt securities will represent our general unsecured obligations. Since
the Company is a holding company, its ability to meet its obligations under the
indentures and the debt securities will be dependent on the earnings and cash
flows of its subsidiaries and the ability of its subsidiaries to pay dividends
or to advance funds to the Company.

   Form, Exchange, Registration and Transfer. Debt securities of a series may
be issuable in definitive form solely as registered securities, solely as
bearer securities or as both. Unless otherwise indicated in a prospectus
supplement, bearer securities will have interest coupons attached. The
indentures also provide that debt securities of a series may be issuable in
temporary or permanent global form.

   Registered securities of any series will be exchangeable for other
registered securities of the same series of any authorized denominations and of
a like aggregate principal amount and tenor. In addition, if debt securities of
any series are issuable as both registered securities and bearer securities,
the holder of such securities may at its option, subject to the terms of the
applicable indenture, exchange bearer securities of such series for registered
securities of the same series of any authorized denominations and of a like
aggregate principal amount and tenor. Bearer securities surrendered in exchange
for registered securities between a regular record date or a special record
date and the relevant date for payment of interest will be surrendered without
the coupon, relating to such date for payment of interest. Interest accrued as
of such date will not be payable on the registered security issued in exchange
for such bearer security, but will be payable only to the holders of such
coupon, when due in accordance with the terms of the applicable indenture.
Bearer securities will not be issued in exchange for registered securities.

   Registered securities may be presented for registration of transfer at the
office of the registrar or at the office of any transfer agent designated by
the Company for such purpose. Such transfer or exchange will be effected once
the registrar or transfer agent, as the case may be, is satisfied with the
documents of title and identity of the person making the request. The Company
has appointed the trustee as registrar. The Company may at any time rescind the
designation of any transfer agent or approve a change in the location through
which any transfer agent acts. However, if debt securities of a series are
issuable solely as registered securities, the Company will be required to
maintain a transfer agent in each place of payment for such series and, if debt

                                       8
<PAGE>

securities of a series are issuable as bearer securities, the Company will be
required to maintain (in addition to the registrar) a transfer agent in a place
of payment for such series located outside the United States. The Company may
at any time designate additional transfer agents with respect to any series of
debt securities.

   In the event of any redemption in part, the Company will not be required to:

  . issue, register the transfer of or exchange debt securities of any series
    during a period beginning at the opening of business 15 days prior to the
    selection of debt securities of that series for redemption and ending on
    the close of business on:

    . if debt securities of the series are issuable only as registered
      securities, the day of mailing of the relevant notice of redemption;
      and

    . if debt securities of the series are issuable as bearer securities,
      the day of the first publication of the relevant notice of redemption
      or, if debt securities of the series are also issuable as registered
      securities and there is no publication, the mailing of the relevant
      notice of redemption;

  . register the transfer of or exchange of any registered security, or
    portion thereof, called for redemption, except the unredeemed portion of
    any registered security being redeemed in part; or

  . exchange any bearer security called for redemption, except to exchange
    such bearer security for a registered security of that series and like
    tenor which is immediately surrendered for redemption.

   Payment and Paying Agents. Unless otherwise indicated in an applicable
prospectus supplement,

  . payment of principal of, and any premium and interest on, bearer
    securities will be payable at the offices of paying agents outside the
    United States as the Company may designate from time to time; and

  . payment of interest on bearer securities on any interest payment date
    will be made only against surrender to the paying agent of the coupon
    relating to such interest payment date.

Payment with respect to any bearer security will not be made at any office or
agency of the Company in the United States, by check mailed to any address in
the United States or by transfer to an account maintained with a bank located
in the United States. Notwithstanding the preceding, payments of principal of,
and any premium and interest on, bearer securities denominated and payable in
U.S. dollars will be made at the offices of the Company's paying agent in the
Borough of Manhattan, the City of New York, if (but only if) payment of the
full amount thereof in U.S. dollars at all offices or agencies outside the
United States is illegal or effectively precluded by exchange controls or other
similar restrictions.

   Unless otherwise indicated in a prospectus supplement, payment of principal
of, and any premium and interest on, registered securities will be made at the
office of the paying agent designated by the Company from time to time.
However, the Company may, at its option, make interest payments on registered
securities by check mailed to the address of the person entitled thereto as
such address appears in the security register. Payment of any installment of
interest on registered securities will be made to the person in whose name such
registered security is registered at the close of business on the regular
record date for payment of such interest.

   Any paying agents outside the United States and any other paying agents in
the United States initially designated by the Company for the debt securities
will be named in a prospectus supplement. The Company may at any time designate
additional paying agents or rescind the designation of any paying agent or
approve a change in the office through which any paying agent acts, except
that:

  . if debt securities of a series are issuable solely as registered
    securities, the Company will be required to maintain a paying agent in
    each place of payment for such series; and

  . if debt securities of a series are issuable as bearer securities, the
    Company will be required to maintain

    . a paying agent in the Borough of Manhattan, the City of New York, for
      principal payments with respect to any registered securities of the
      series; and

                                       9
<PAGE>

    . a paying agent in a place of payment located outside the United
      States where debt securities of such series and any related coupons
      may be presented and surrendered for payment.

All monies paid by the Company to a paying agent for the payment of principal
of, or any premium or interest on, any debt security which remain unclaimed at
the end of two years after such amounts have become due and payable will be
repaid to the Company. Following the repayment of such monies to the Company,
the holder of a debt security or any coupon may look only to the Company for
payment.

   Global Debt Securities. Debt securities of a series may be issued in whole
or in part in the form of one or more global debt securities that will be
deposited with, or on behalf of, a depository identified in the prospectus
supplement relating to such series. Global debt securities may be issued in
either registered or bearer form and in either temporary or permanent form.
Unless and until it is exchanged for the individual debt securities it
represents, a global debt security may only be transferred as a whole by the
depository for such global debt security to a nominee of such depository or by
a nominee of such depository to such depository or another nominee of such
depository or by the depository or any nominee to a successor depository or any
nominee of such successor.

   The specific terms of the depository arrangement with respect to a series of
debt securities and certain limitations and restrictions relating to a series
of bearer securities in the form of one or more global debt securities will be
described in the prospectus supplement relating to such series.

   Events of Default. Any one of the following events will constitute an event
of default under the indentures with respect to the debt securities of any
series:

  . failure to pay any interest on any debt security of that series when due
    for 30 days;

  . failure to pay principal of, or any premium on, any debt security of that
    series when due;

  . failure to deposit any sinking fund payment when due in respect of that
    series;

  . failure to perform any other covenant with respect to that series in such
    indenture for 90 days after written notice;

  . certain events in bankruptcy, insolvency or reorganization involving the
    Company; and

  . any other event of default included in the indenture or any supplemental
    indenture with respect to debt securities of that series.

   If an event of default with respect to debt securities of any series occurs
and is continuing, either the trustee or the holders of at least 25% in
aggregate principal amount of the outstanding securities of that series, by
notice as provided in the applicable indenture, may declare the principal
amount of all the debt securities of that series to be due and payable
immediately. At any time after a declaration of acceleration with respect to
debt securities of any series has been made, but before a judgment or decree
for payment of money has been obtained by the trustee, the holders of a
majority in aggregate principal amount of the outstanding securities of that
series may, under certain circumstances, rescind and annul such acceleration.

   Each indenture provides that, subject to the duty of the trustee during
default to act with the required standard of care, the trustee will be under no
obligation to exercise any of its rights or powers under such indenture at the
request or direction of any of the holders, unless such holders have offered
the trustee reasonable indemnity. Subject to such provisions for the
indemnification of the trustee, the holders of a majority in aggregate
principal amount of the outstanding securities of any series have the right to
direct the time, method and place of conducting any proceeding for any remedy
available to the trustee, or exercising any trust or power conferred on the
trustee, with respect to the debt securities of that series. However, the
trustee is not obligated to take any action unduly prejudicial to holders not
joining in such direction or subjecting the debt trustee to personal liability.

                                       10
<PAGE>

   The Company is required to furnish to the trustee annually a statement as to
the performance by the Company of its obligations under each indenture and as
to any default in performance under the indentures.

   Defeasance. If so specified with respect to any series of debt securities,
the Company may discharge its indebtedness and its obligations under the
indenture governing such series by depositing money or U.S. government
obligations with the trustee.

   Defeasance and Discharge. Each indenture provides that, if so specified with
respect to any series of debt securities, the Company will be discharged from
its obligations in respect of the debt securities of such series upon the
deposit with the trustee, in trust, of money and/or U.S. government obligations
in an amount sufficient to pay the principal of, and premium, if any, and each
installment of interest on, the debt securities of such series on the stated
maturity of such payments.

   The Company may establish a trust to defease and discharge its obligations,
only if, among other things, it has delivered to the trustee an opinion of
counsel to the effect that:

  . the Company has received from, or there has been published by, the
    Internal Revenue Service a ruling, or

  . since the date of the indenture there has been a change in applicable
    federal income tax law;

in either case to the effect that the holders of the debt securities will not
recognize income, gain or loss for federal income tax purposes as a result of
such deposit, defeasance and discharge. The opinion must also provide that the
holders of the debt securities will be subject to federal income tax on the
same amounts and in the same manner as would have been the case if such
deposit, defeasance and discharge had not occurred. In the event of any such
defeasance and discharge, holders of debt securities of such series will be
entitled to look only to such trust fund for payment of principal of, and any
premium and any interest on their debt securities until maturity.

   Covenant Defeasance. Each indenture provides that, if so specified with
respect to any series of debt securities, the Company may omit to comply with
certain restrictive covenants, including, in the case of the senior debt
indenture, the covenant described under "--Limitation on Liens" below, but
excluding, in the case of the subordinated debt indenture, any applicable
obligation of the Company respecting the conversion of debt securities of such
series into common stock. Any such omission will not be an event of default
with respect to the debt securities of such series, upon the deposit with the
trustee, in trust, of money and/or U.S. government obligations in an amount
sufficient to pay the principal of, and premium, if any, and each installment
of interest on, the debt securities of such series on the stated maturity of
such payments. The other obligations of the Company will remain in full force
and effect. Such a trust may be established only if, among other things, the
Company has delivered to the trustee an opinion of counsel to the effect that
the holders of the debt securities of such series will not recognize income,
gain or loss for federal income tax purposes as a result of such deposit and
covenant defeasance. The opinion must also provide that holders of the debt
securities will be subject to federal income tax on the same amounts and in the
same manner and at the same times as would have been the case if such deposit
and defeasance had not occurred.

   Federal Income Tax Consequences Relating to Defeasance and Covenant
Defeasance. Under current United States federal income tax law, defeasance and
discharge would likely be treated as a taxable exchange of debt securities to
be defeased for an interest in the defeasance trust. As a consequence, a holder
would recognize gain or loss equal to the difference between the holder's cost
or other tax basis for such debt securities and the value of the holder's
interest in the defeasance trust, and thereafter would be required to include
in income a share of the income, gain or loss of the defeasance trust. Under
current United States federal income tax law, covenant defeasance would
ordinarily not be treated as a taxable exchange of such debt securities.

   Modification and Waiver. With the consent of the holders of a majority in
aggregate principal amount of the outstanding debt securities of each series
affected, the Company and the trustee may modify or amend

                                       11
<PAGE>

either indenture. However, any modification or amendment may not, without the
consent of each holder affected by such modification or amendment:

  . change the stated maturity of the principal of, or any installment of
    principal of or interest on, any debt security;

  . change the redemption date with respect to any debt security;

  . reduce the principal amount of, or premium or interest on, any debt
    security;

  . change any obligation of the Company to pay additional amounts;

  . reduce the amount of principal of an original issue discount security
    payable upon acceleration of the maturity thereof;

  . change the coin or currency in which any debt security or any premium or
    interest thereon is payable;

  . change the redemption right of any holder;

  . impair the right to institute suit for the enforcement of any payment on
    or with respect to any debt security or any conversion right with respect
    to any debt security;

  . reduce the percentage in principal amount of outstanding securities of
    any series, the consent of whose holders is required to modify or amend
    such indenture or to waive compliance with certain provisions of such
    indenture or to waive certain defaults;

  . reduce the requirements contained in such indenture for quorum or voting;

  . change any obligation of the Company to maintain an office or agency in
    the places and for the purposes required by such indenture;

  . adversely affect the right to convert subordinated debt securities; or

  . modify any of the above provisions.

   The subordinated debt indenture may not be amended to alter the
subordination of any outstanding subordinated debt securities without the
consent of each holder of Senior Indebtedness (as defined below) then
outstanding that would be adversely affected by such an amendment.

   The holders of a majority in aggregate principal amount of the outstanding
debt securities of each series may, on behalf of the holders of all debt
securities of that series, waive compliance by the Company with certain
restrictive provisions of the indenture under which such series has been
issued. The holders of a majority in aggregate principal amount of the
outstanding debt securities of each series may, on behalf of all holders of
debt securities of that series, waive any past default under the applicable
indenture with respect to any debt securities of that series, except a default:

  . in the payment of principal of, or premium, if any, or any interest on,
    any debt security of such series; or

  . in respect of a covenant or provision of such indenture which cannot be
    modified or amended without the consent of the holder of each outstanding
    security of such series affected.

   Each indenture provides that in determining whether the holders of the
requisite principal amount of the outstanding debt securities have given any
request, demand, authorization, direction, notice, consent or waiver under the
indenture, or are present at a meeting of the holders of debt securities for
quorum purposes:

  . the principal amount of an original issue discount security that is
    deemed to be outstanding will equal the amount of the principal that
    would be due and payable as of the date of such determination upon
    acceleration of the maturity of such debt security; and

                                       12
<PAGE>

  . the principal amount of a debt security denominated in a foreign currency
    or currency units will equal the U.S. dollar equivalent, determined on
    the date of original issuance of such debt security, of the principal
    amount of such debt security or, in the case of an original issue
    discount security, the U.S. dollar equivalent, determined on the date of
    original issuance of such debt security, of the amount determined as
    provided in the preceding bullet point.

   Meetings. Each indenture contains provisions for convening meetings of the
holders of debt securities of a series issuable as bearer securities. A meeting
may be called at any time by the trustee, and also, upon request by the Company
or the holders of at least 10% in aggregate principal amount of the outstanding
debt securities of that series, in any such case upon notice given in
accordance with the provisions described under "--Notices" below. Except for
any consent which must be given by the holders of each outstanding debt
security affected, any resolution presented at a meeting may be adopted by the
affirmative vote of the holders of a majority in aggregate principal amount of
the outstanding debt securities of that series. Except for any consent or
waiver that must be given by the holder of each outstanding security, any
resolution with respect to any request, demand, authorization, direction,
notice, consent, waiver or other action which may be made, given or taken by
the holders of less than a majority in aggregate principal amount of the
outstanding debt securities of a series may be adopted at a meeting or
adjourned meeting duly reconvened at which a quorum is present by the
affirmative vote of such specified percentage in aggregate principal amount of
the outstanding debt securities of that series. Any resolution passed or
decision taken at any meeting of holders of debt securities of any series duly
held in accordance with the applicable indenture will be binding on all holders
of debt securities of that series and related coupons. The quorum at any
meeting, and at any reconvened meeting, will be persons holding or representing
a majority in aggregate principal amount of the outstanding securities of a
series.

   Consolidation, Merger and Sale of Assets. The Company, without the consent
of the holders of any of the outstanding debt securities under either
indenture, may consolidate with or merge into, or convey, transfer or lease its
properties and assets substantially as an entirety to, any other corporation,
partnership or trust organized and validly existing under the laws of any
domestic jurisdiction, provided that:

  . any successor person assumes the Company's obligations on the debt
    securities under such indenture;

  . after giving effect to the transaction no event of default has occurred
    and is continuing; and

  . certain other procedural conditions are met.

   Notices. Except as otherwise provided in the indentures, notices to holders
of bearer securities will be given by publication at least twice in a daily
newspaper in The City of New York and in such other city or cities as may be
specified in such bearer securities. Notices to holders of registered
securities will be given by mail to the addresses of such holders as they
appear in the register.

   Title. Title to any bearer securities and any related coupons will pass by
delivery. The Company, the trustee and any agent of the Company or the trustee
may treat the bearer of any bearer security and the bearer of any coupon and
the registered owner of any registered security as the owner thereof for all
purposes.

   Replacement of Securities. Any mutilated debt security or a debt security
with a mutilated coupon will be replaced by the Company at the expense of the
holder upon surrender of such debt security to the trustee. Debt securities or
coupons that become destroyed, stolen or lost will be replaced by the Company
at the expense of the holder upon delivery to the trustee of the debt security
and coupons or evidence of destruction, loss or theft satisfactory to the
Company and the trustee. In the case of any coupon which becomes destroyed,
stolen or lost, such coupon will be replaced by issuance of a new debt security
in exchange for the debt security to which such coupon relates. In the case of
a destroyed, lost or stolen debt security or coupon, the holder of such debt
security or coupon may be required to provide indemnity satisfactory to the
trustee and the Company before a replacement debt security will be issued.

                                       13
<PAGE>

   Governing Law. The indentures, the debt securities and coupons will be
governed by, and construed in accordance with, the laws of the State of New
York.

   Regarding the Trustee. The Company and certain of its subsidiaries from time
to time borrow money from, and maintain deposit accounts and conduct certain
banking transactions with, Bank One, National Association in the ordinary
course of their business. Bank One, National Association also serves as agent
and is a lender under the Company's bank credit facility.

   The indentures contain certain limitations on the right of the trustee,
should it become a creditor of the Company, to obtain payment of claims in
certain cases, or to realize for its own account on certain property received
in respect of any such claim as security or otherwise. The trustee will be
permitted to engage in certain other transactions; however, if it acquires any
conflicting interest, it must eliminate such conflict or resign.

   Pursuant to the Trust Indenture Act of 1939, should a default occur with
respect to either the senior debt securities or the subordinated debt
securities, Bank One Trust Company, NA would be required to resign as trustee
under one of the indentures within 90 days of such default unless such default
were cured, duly waived or otherwise eliminated.

Provisions Applicable Solely to Senior Debt Securities

   General. Senior debt securities will be issued under the senior debt
indenture. Each series of senior debt securities will rank equally as to the
right of payment of principal and any premium and interest with each other
series issued under the senior debt indenture and will rank senior to all
subordinated debt securities that may be issued.

                              CERTAIN DEFINITIONS

   "Net Tangible Assets" means the total amount of assets appearing on a
consolidated balance sheet of the Company and its Subsidiaries less, without
duplication:

  . total current liabilities (excluding current maturities of long-term debt
    and preferred stock);

  . all reserves for depreciation and other asset valuation reserves;

  . all intangible assets such as goodwill, trademarks, trade names, patents
    and unamortized debt discount and expense carried as an asset; and

  . all appropriate adjustments on account of minority interests of other
    persons holding common stock in any Subsidiary.

   "Principal Property" means any natural gas, natural gas liquids or crude oil
pipeline, distribution system, gathering system, storage facility or processing
plant, except any such property that in the opinion of the Board of Directors
of the Company is not of material importance to the business conducted by the
Company and its consolidated Subsidiaries taken as a whole.

   "Principal Subsidiary" means any Subsidiary which owns a Principal Property.

   "Subsidiary" of a Person means:

  . any corporation more than 50% of the outstanding securities having
    ordinary voting power of which is owned, directly or indirectly, by such
    person or by one or more of its Subsidiaries, or by such person and one
    or more of its Subsidiaries; or

  . any partnership or similar business organization more than 50% of the
    ownership interests having ordinary voting power of which shall at the
    time be so owned.

                                       14
<PAGE>

For the purposes of this definition, "securities having ordinary voting power"
means securities or other equity interests which ordinarily have voting power
for the election of directors, or persons having management power with respect
to the person, whether at all times or only so long as no senior class of
securities has such voting power by reason of any contingency.

   Limitation On Liens. The senior debt indenture provides that the Company
will not, and will not permit any Principal Subsidiary to, issue, assume or
guarantee any indebtedness for money borrowed ("Debt") if such Debt is secured
by a mortgage, pledge, security interest or lien (a "mortgage" or "mortgages")
upon any Principal Property of the Company or any Principal Subsidiary or upon
any shares of stock or indebtedness of any Principal Subsidiary (whether such
Principal Property, shares of stock or indebtedness is now owned or hereafter
acquired) without in any such case effectively providing that the senior debt
securities shall be secured equally and ratably with (or prior to) such Debt,
except that the foregoing restrictions will not apply to:

  . mortgages on any property acquired, constructed or improved by the
    Company or any Principal Subsidiary after the date of the senior debt
    indenture which are created within 180 days after such acquisition (or in
    the case of property constructed or improved, after the completion and
    commencement of commercial operation of such property, whichever is
    later) to secure or provide for the payment of the purchase price or cost
    thereof; provided that in the case of such construction or improvement
    the mortgages shall not apply to any property theretofore owned by the
    Company or any Principal Subsidiary other than theretofore unimproved
    real property;

  . existing mortgages on property acquired (including mortgages on any
    property acquired from a person which is consolidated with or merged with
    or into the Company or a Subsidiary) or mortgages outstanding at the time
    any corporation, partnership or trust becomes a Subsidiary that are not
    incurred in connection with such entity becoming a Subsidiary;

  . mortgages in favor of domestic or foreign governmental bodies to secure
    advances or other payments pursuant to any contract or statute or to
    secure indebtedness incurred to finance the purchase price or cost of
    constructing or improving the property subject to such mortgages,
    including mortgages to secure Debt of the pollution control or industrial
    revenue bond type;

  . mortgages in favor of the Company or any Principal Subsidiary;

  . mortgages on any Principal Property held, leased or used by the Company
    or any Principal Subsidiary in connection with the exploration for,
    development of or production of (but not the gathering, processing,
    transportation or marketing of) natural gas, oil or other minerals; or

  . any extension, renewal or replacement (or successive extensions, renewals
    or replacements), in whole or in part, of any mortgage referred to in the
    preceding bullet points.

   Notwithstanding the preceding, the Company and any Principal Subsidiary may,
without securing the senior debt securities, issue, assume or guarantee secured
Debt (which would otherwise be subject to the foregoing restrictions) in an
aggregate amount which, together with all other such Debt, does not exceed 15%
of the Net Tangible Assets, as shown on a consolidated balance sheet, prepared
by the Company in accordance with generally accepted accounting principles, as
of a date not more than 90 days prior to the proposed transaction.

                                       15
<PAGE>

Provisions Applicable Solely to Subordinated Debt Securities

   Subordination. The subordinated debt securities will be subordinate and
junior in right of payment, to the extent set forth in the subordinated debt
indenture, to all Senior Indebtedness (as defined below) of the Company.

   "Indebtedness" is defined in the subordinated debt indenture as, with
respect to any person, (a) all liabilities and obligations, contingent or
otherwise, of any such person, (i) in respect of borrowed money (whether or not
the recourse of the lender is to the whole of the assets of such person or only
to a portion thereof), (ii) evidenced by bonds, notes, debentures or similar
instruments, (iii) representing the balance deferred and unpaid of the purchase
price of any property or services, except such as would constitute trade
payables to trade creditors in the ordinary course of business, (iv) evidenced
by bankers' acceptances or similar instruments issued or accepted by banks, (v)
for the payment of money relating to a capitalized lease obligation, or (vi)
evidenced by a letter of credit or a reimbursement obligation of such person
with respect to any letter of credit; (b) all net obligations of such person
under interest swap and hedging obligations; (c) all liabilities of others of
the kind described in the preceding clause (a) or (b) that such person has
guaranteed or that is otherwise its legal liability and all obligations to
purchase, redeem or acquire any capital stock and (d) any and all deferrals,
renewals, extensions, refinancings, refundings (whether direct or indirect) of
any liability of the kind described in any of the preceding clause (a), (b) or
(c), or this clause (d), whether or not between or among the same parties.

   "Junior Security" is defined in the subordinated debt indenture as any
qualified capital stock of any person and any Indebtedness of such person that
is subordinated in right of payment to the securities of each series then
outstanding and has no scheduled installment of principal due, by redemption,
sinking fund payment or otherwise, on or prior to the latest stated maturity of
the principal of any outstanding securities.

   "Senior Indebtedness" is defined in the subordinated debt indenture as
Indebtedness (as defined below) of the Company, whether outstanding on the date
of the subordinated debt indenture or thereafter created, incurred, assumed,
guaranteed or in effect guaranteed by the Company, unless the instrument
creating or evidencing such Indebtedness provides that such Indebtedness is not
senior or superior, in right of payment, to the subordinated debt securities or
to other Indebtedness which ranks equally with, or is subordinated to, the
subordinated debt securities; provided, however, that in no event will Senior
Indebtedness include (a) Indebtedness of the Company owed or owing to any
Subsidiary of the Company or any officer, director or employee of the Company
or any Subsidiary of the Company except in respect of deferred compensation in
an amount not to exceed $10,000,000 at any one time, (b) Indebtedness to trade
creditors, (c) any liability for taxes owed or owing by the Company and (d) the
subordinated debt securities.

   The subordinated debt indenture provides that no payment may be made by the
Company on account of the principal of or any premium or interest on the
subordinated debt securities, or to acquire any of the subordinated debt
securities (including repurchases of subordinated debt securities at the option
of the holders) for cash or property (other than Junior Securities), or on
account of any redemption provisions of the subordinated debt securities:

  . upon the maturity of any Senior Indebtedness of the Company by lapse of
    time, acceleration (unless waived) or otherwise, unless and until all
    principal of and any premium and interest on such Senior Indebtedness are
    first paid in full (or such payment is duly provided for); or

  . in the event of default in the payment of any principal of or any premium
    or interest on any Senior Indebtedness when it becomes due and payable,
    whether at stated maturity or at a date fixed for prepayment or by
    declaration or otherwise (a "Payment Default"), unless and until such
    Payment Default has been cured or waived or otherwise has ceased to
    exist.

   Upon (i) the happening of an event of default (other than a Payment Default)
that permits the holders of Senior Indebtedness or their representative
immediately to accelerate its maturity and (ii) written notice of such

                                       16
<PAGE>

event of default given to the Company and the trustee by the holders of at
least 25% in the aggregate principal amount outstanding of such Senior
Indebtedness or their representative (a "Payment Notice"), then, unless and
until such event of default has been cured or waived or otherwise has ceased to
exist, no payment (by set off or otherwise) may be made by or on behalf of the
Company on account of the principal of or any premium or interest on the
subordinated debt securities, or to acquire or repurchase any of the
subordinated debt securities for cash or property, or on account of any
redemption provisions of the subordinated debt securities, in any such case
other than payments made with Junior Securities of the Company. Notwithstanding
the preceding, unless (i) the Senior Indebtedness in respect of which such
event of default exists has been declared due and payable in its entirety
within 179 days after the Payment Notice is delivered as set forth above (the
"Payment Blockage Period"), and (ii) such declaration has not been rescinded or
waived, at the end of the Payment Blockage Period, the Company will be required
to pay all sums not paid to the holders of the subordinated debt securities
during the Payment Blockage Period due to the foregoing prohibitions and to
resume all other payments as and when due on the subordinated debt securities.
Any number of Payment Notices may be given; provided, however, that (i) not
more than one Payment Notice shall be given within a period of any 360
consecutive days and (ii) no event of default that existed upon the date of
such Payment Notice or the commencement of such Payment Blockage Period
(whether or not such event of default is on the same issue of Senior
Indebtedness) will be made the basis for the commencement of any other Payment
Blockage Period.

   Upon any distribution of assets of the Company upon any dissolution, winding
up, liquidation or reorganization of the Company, whether voluntary or
involuntary, in bankruptcy, insolvency, receivership or a similar proceeding or
upon assignment for the benefit of creditors or any marshaling of assets or
liabilities, (i) the holders of all Senior Indebtedness will first be entitled
to receive payment in full (or have such payment duly provided for) before the
holders are of subordinated debt securities entitled to receive any payment on
account of the principal of or any premium or interest on the subordinated debt
securities (other than Junior Securities) and (ii) any payment or distribution
of assets of the Company of any kind or character, whether in cash, property or
securities (other than Junior Securities) to which the holders of subordinated
debt securities or the trustee on behalf of such holders would be entitled (by
set off or otherwise), except for the subordination provisions contained in the
subordinated debt indenture, will be paid by the liquidating trustee or agent
or other person making such a payment or distribution directly to the holders
of subordinated debt securities of Senior Indebtedness or their representative
to the extent necessary to make payment in full of all such Senior Indebtedness
remaining unpaid, after giving effect to any concurrent payment or distribution
to the holders of such Senior Indebtedness.

   In the event that, notwithstanding the preceding, any payment or
distribution of assets of the Company (other than Junior Securities) is
received by the trustee or the holders of subordinated debt securities at a
time when such payment or distribution is prohibited by the foregoing
provisions, then such payment or distribution will be received and held in
trust by the trustee or such holders for the benefit of the holders of Senior
Indebtedness. Such payment or distribution shall be paid or delivered by the
trustee or such holders, as the case may be, to the holders of the Senior
Indebtedness remaining unpaid or unprovided for, to the trustee or trustees
under any indenture pursuant to which any instruments evidencing any of such
Senior Indebtedness may have been issued, ratably according to the aggregate
amounts remaining unpaid on account of the Senior Indebtedness held or
represented by each, for application to the payment of all Senior Indebtedness
remaining unpaid, to the extent necessary to pay or to provide for the payment
of all such Senior Indebtedness in full after giving effect to any concurrent
payment and distribution to the holders of such Senior Indebtedness.

   No provisions contained in the subordinated debt indenture or the
subordinated debt securities will affect the obligation of the Company, which
is absolute and unconditional, to pay, when due, principal of and any premium
and interest on the subordinated debt securities as and when the same shall
become due and payable. The subordination provisions of the subordinated debt
indenture and the subordinated debt securities will not prevent the occurrence
of any event of default under the subordinated debt indenture or limit the
rights of the trustee or any holder of subordinated debt securities, subject to
the three preceding paragraphs, to pursue any other rights or remedies with
respect to the subordinated debt securities.

                                       17
<PAGE>

   The prospectus supplement respecting any series of subordinated debt
securities will set forth any subordination provisions applicable to such
series in addition to or different from those described above.

   By reason of such subordination, in the event of the insolvency of the
Company, holders of Senior Indebtedness and holders of other obligations of the
Company that are not subordinated to Senior Indebtedness may receive more,
ratably, than holders of the subordinated debt securities. However, this
subordination will not prevent the occurrence of an event of default or limit
the right of acceleration in respect of the subordinated debt securities.

   Conversion. The subordinated debt indenture may provide for a right of
conversion of subordinated debt securities into common stock (or cash in lieu
thereof). The following provisions will apply to subordinated debt securities
that are convertible subordinated debt securities unless otherwise provided in
a prospectus supplement.

   The holder of any convertible subordinated debt securities will have the
right exercisable at any time prior to the close of business on the second
business day prior to their stated maturity, unless previously redeemed or
otherwise purchased by the Company, to convert such subordinated debt
securities into shares of common stock at the conversion price set forth in the
applicable prospectus supplement. The holder of convertible subordinated debt
securities may convert any portion thereof which is $1,000 in principal amount
of any integral multiple thereof.

   The conversion price will be subject to adjustment as set forth in
subordinated debt indenture. Fractional shares of common stock will not be
issued upon conversion. The Company will pay a cash adjustment in lieu of any
fractional share based on the then current market price of the common stock.
Upon conversion, no adjustments will be made for accrued interest or dividends.
As a result, convertible subordinated debt securities surrendered for
conversion between the record date for an interest payment and the interest
payment date must be accompanied by payment of an amount equal to the interest
thereon which the registered holder is to receive.

   In the case of any reclassification, consolidation or merger of the Company
with or into another person or any merger of another person with or into the
Company (with certain exceptions), or in case of any conveyance, transfer or
lease of the assets of the Company substantially as an entirety, each
convertible subordinated debt security then outstanding will, without the
consent of any holder, become convertible only into the kind and amount of
securities, cash and other property receivable upon such reclassification,
consolidation, merger, conveyance, transfer or lease by a holder of the number
of shares of common stock into which such subordinated debt security was
convertible immediately prior thereto, after giving effect to any adjustment
event, who failed to exercise any rights of election and received per share the
kind and amount received per share by a plurality of non-electing shares.

                                       18
<PAGE>

                      DESCRIPTION OF PREFERRED SECURITIES

   The trust will issue the preferred securities pursuant to the terms of the
trust agreement. The preferred securities will represent preferred undivided
beneficial interests in the assets of the trust. Holders of the preferred
securities will be entitled to a preference over the common securities in
certain circumstances with respect to distributions and amounts payable on
redemption of the trust securities or liquidation of the trust. See "--
Subordination of Common Securities." The trust agreement will be qualified
under the Trust Indenture Act of 1939. The following description is a summary
of material provisions of the preferred securities, the common securities and
the trust agreement, a copy of which is filed as an exhibit to the Registration
Statement of which this prospectus is a part. This summary description does not
purport to be complete and is subject to, and is qualified in its entirety by
reference to, all the provisions of the trust agreement.

General

   The trust agreement authorizes the trust to issue the preferred securities
and the common securities. The Company will own all of the common securities.
The preferred securities will rank equally, and payments on the preferred
securities will be made pro rata, with the common securities. However, upon the
occurrence of a debenture event of default, the rights of the holders of the
common securities to receive distributions and payments upon liquidation,
redemption and otherwise will be subordinated to the rights of the holders of
preferred securities.

   The trust will invest the proceeds obtained from any issuance of preferred
securities, together with the consideration paid by the Company for the common
securities, in trust debentures issued by the Company. See "Description of
Trust Debentures." Legal title to the trust debentures will be held by the
property trustee in trust for the benefit of the holders of the trust
securities.

   In accordance with the trust agreement, the trust may not:

  . borrow money;

  . issue debt or any securities other than the trust securities;

  . execute mortgages; or

  . pledge any of its assets.

   The Company will guarantee distributions on the preferred securities on a
limited basis to the extent described under the caption "Description of
Guarantee." The guarantee will not guarantee payment of distributions or
amounts payable on redemption of the preferred securities or liquidation of the
trust when the trust does not have funds on hand legally available for such
payments. In such event, a remedy of a holder of preferred securities is to
direct the property trustee to enforce its rights under the trust debentures.
If the property trustee fails to enforce its rights with respect to the trust
debentures held by the trust, any record holder of preferred securities may, to
the fullest extent permitted by law, institute legal proceedings directly
against the Company to enforce the property trustee's rights under such trust
debentures without first instituting any legal proceedings against such
property trustee or any other person or entity. In addition, a holder of
preferred securities may institute a legal proceeding directly against the
Company for enforcement of payment to such holder of principal of, premium, if
any, or interest on the trust debentures having a principal amount equal to the
aggregate liquidation amount of the preferred securities of such holder on or
after the due date specified in the trust debentures.

   Holders of the preferred securities have no preemptive or similar rights.

                                       19
<PAGE>

Distributions

   Distributions on the preferred securities will be payable on the dates and
at the rates set forth in a prospectus supplement. The distribution rate and
the relevant distribution date for the trust securities will correspond to the
payments and payment dates on the trust debentures. The revenue of the trust
available for distribution to holders of the preferred securities will be
limited to payments under the trust debentures in which the trust will invest
the proceeds from the issuance and sale of the trust securities. If the Company
does not make interest payments on the trust debentures, the property trustee
will not have funds available to pay distributions on the preferred securities.

   The Company may, on one or more occasions, defer the payment of interest on
the trust debentures for a period not exceeding 10 consecutive semi-annual
periods, unless a debenture event of default has occurred and is continuing.
However, no deferral period shall end on a date other than an interest payment
date or extend beyond the stated maturity date. Semi-annual distributions on
the preferred securities will be deferred by the trust during any such deferral
period. Distributions to which holders of the preferred securities are entitled
during any such deferral period will accumulate additional distributions at the
rate per annum set forth in the prospectus supplement.

   Upon the termination of any deferral period and the payment of all amounts
then due on any interest payment date, the Company may elect to begin a new
deferral period, subject to the requirements described above. No interest shall
be due and payable during any deferral period, except at the end of the period.
The Company must give the property trustee, the debenture trustee and the
administrative trustees notice of its election to defer the payment of interest
on the trust debentures at least five business days prior to the earlier of:

  . the date the distributions on the preferred securities would have been
    payable except for the election to begin such deferral period; or

  . the date the administrative trustees are required to give notice to any
    securities exchange or to holders of preferred securities of the record
    date or the date such distributions are payable, but in any event not
    less than five business days prior to such record date.

   There is no limitation on the number of times that the Company may elect to
begin any deferral period. Accordingly, there could be multiple deferral
periods of varying lengths throughout the term of the preferred securities. See
"Description of Trust Debentures--Option to Extend Interest Payment Date."

   During any deferral period, the Company may not, and will not permit any
subsidiaries of the Company to:

  . declare or pay any dividends or distributions on, or redeem, purchase,
    acquire, or make a liquidation payment with respect to, any of the
    Company's capital stock (subject to certain exceptions);

  . make any payment of principal of or premium, if any, or interest on or
    repay, repurchase or redeem any debt securities of the Company, including
    other debentures that rank pari passu with or junior in right of payment
    to the trust debentures; or

  . make any guarantee payments (other than payments under the guarantee)
    with respect to any guarantee by the Company of the debt securities of
    any subsidiary of the Company, including other guarantees, if such
    guarantee ranks pari passu with or junior in right of payment to the
    trust debentures.

Payment of Additional Sums

   If the trust is required to pay any taxes, duties, or other governmental
charges imposed by the United States or any other taxing authority, the Company
will be required to pay such additional sums necessary in

                                       20
<PAGE>

order that the amount of distributions then due and payable by the trust on the
outstanding preferred securities and common securities of the trust will not be
reduced as a result of any additional taxes, duties and other governmental
charges to which the trust has become subject.

Redemption

   Upon the repayment on the stated maturity date or prepayment prior to the
stated maturity date of the trust debentures (other than following the
distribution of the trust debentures to the holders of the trust securities),
the proceeds from such repayment or prepayment shall be applied by the property
trustee to redeem a Like Amount (as defined below) of the trust securities,
upon not less than 30 nor more than 60 days' notice of a date of redemption to
the holders of the trust securities, at the applicable redemption price, which
shall be equal to:

  . in the case of the payment of the trust debentures on the stated maturity
    date, the maturity redemption price equal to the principal amount of,
    plus accrued and unpaid interest on, the trust debentures;

  . in the case of the optional prepayment of the trust debentures, upon the
    occurrence and continuation of a Special Event, the Special Event
    Redemption Price equal to the Special Event Prepayment Price in respect
    of the trust debentures; and

  . in the case of the optional prepayment of the trust debentures, the
    optional redemption price equal to the optional prepayment price in
    respect of the trust debentures.

See "Description of Trust Debentures--Optional Prepayment" and "--Special Event
Prepayment." If fewer than all of the trust debentures are to be prepaid on a
redemption date, then the proceeds of such prepayment shall be allocated pro
rata among the trust securities.

   "Like Amount" means:

  . with respect to a redemption of the trust securities, trust securities
    having a liquidation amount equal to the principal amount of trust
    debentures to be paid in accordance with their terms; and

  . with respect to a distribution of trust debentures upon the dissolution
    and liquidation of the trust, trust debentures having a principal amount
    equal to the liquidation amount of the trust securities of the holder to
    whom such trust debentures are being distributed.

   The Company will have the option to prepay the trust debentures:

  . in whole at any time or in part from time to time at the optional
    prepayment price; and

  . in whole but not in part, at any time within 90 days of the occurrence of
    a Special Event, at the Special Event Prepayment Price.

   See "Description of Trust Debentures--Optional Prepayment" and "--Special
Event Prepayment."

Redemption Procedures

   If applicable, trust securities shall be redeemed at the applicable
redemption price with the proceeds from the contemporaneous repayment or
prepayment of the trust debentures. Any redemption of trust securities will be
made and the applicable redemption price will be payable on the redemption date
only to the extent that the trust has funds legally available for the payment
of the applicable redemption price. See also "--Subordination of Common
Securities."

                                       21
<PAGE>

   If the trust gives a notice of redemption in respect of the preferred
securities, then, by 12:00 noon, New York City time, on the redemption date, to
the extent funds are legally available, with respect to the preferred
securities held by DTC or its nominees, the property trustee will deposit with
DTC funds sufficient to pay the applicable redemption price. See "--Form,
Denomination, Book-Entry Procedures and Transfer." With respect to the
preferred securities held in certificated form, the property trustee, to the
extent funds are legally available, will deposit with the paying agent for the
preferred securities funds sufficient to pay the applicable redemption price
and will give such paying agent irrevocable instructions and authority to pay
the applicable redemption price to the holders of the preferred securities upon
surrender of their certificates evidencing the preferred securities. See "--
Payment and Paying Agency." Notwithstanding the foregoing, distributions
payable on or prior to the redemption date shall be payable to the holders of
such preferred securities on the relevant record dates for the related
distribution dates. If notice of redemption has been given and funds are
deposited as required, then upon the date of such deposit, all rights of the
holders of the preferred securities called for redemption will cease, except
the right of the holders of the preferred securities to receive the applicable
redemption price, and the preferred securities will cease to be outstanding.

   In the event that any redemption date of preferred securities is not a
business day, then the redemption price will be paid on the next succeeding day
that is a business day. If the next succeeding business day falls in the next
calendar year, then the required payment will be made on the immediately
preceding business day. In the event that payment of the redemption price is
improperly withheld or refused and not paid either by the trust or by the
Company pursuant to the guarantee:

  . distributions on preferred securities will continue to accumulate at the
    then applicable rate, from the redemption date originally established by
    the trust to the date the redemption price is actually paid; and

  . the actual payment date will be the redemption date for purposes of
    calculating the applicable redemption price.

   The Company or its subsidiaries may, subject to applicable law, at any time
and from time to time purchase outstanding preferred securities by tender, in
the open market or by private agreement.

   The trust may not redeem fewer than all of the outstanding preferred
securities unless all accumulated and unpaid distributions have been paid on
all preferred securities for all semi-annual distribution periods terminating
on or prior to the redemption date. If less than all of the preferred
securities and common securities issued by the trust are to be redeemed on a
redemption date, then the aggregate amount of such preferred securities and
common securities to be redeemed shall be allocated pro rata among the
preferred securities and the common securities. The particular preferred
securities to be redeemed shall be selected on a pro rata basis not more than
60 days prior to the redemption date by the property trustee from the
outstanding preferred securities not previously called for redemption, by such
method as the property trustee shall deem fair and appropriate. The property
trustee shall promptly notify the trust registrar in writing of the preferred
securities selected for redemption and, in the case of any preferred security
selected for partial redemption, the liquidation amount to be redeemed. For all
purposes of the trust agreement, unless the context otherwise requires, all
provisions relating to the redemption of preferred securities shall relate, in
the case of any preferred security redeemed or to be redeemed only in part, to
the portion of the aggregate liquidation amount of preferred securities which
has been or is to be redeemed.

   Notice of any redemption will be mailed at least 30 days but not more than
60 days prior to the redemption date to each holder of trust securities at its
registered address. Unless the Company defaults in payment of the applicable
redemption price on, or in the repayment of, the trust debentures, on and after
the redemption date distributions will cease to accrue on the trust securities
called for redemption.

Liquidation of the Trust and Distribution of Trust Debentures

   The Company will have the right at any time to dissolve the trust and, after
satisfaction of liabilities to creditors of the trust, cause the trust
debentures to be distributed to the holders of the trust

                                       22
<PAGE>

securities in liquidation of the trust. This dissolution right is subject to
the administrative trustees having received an opinion of counsel to the
effect that such distribution will not be a taxable event to holders of
preferred securities.

   The trust shall automatically dissolve upon the first to occur of:

  . certain events of bankruptcy, dissolution or liquidation of the Company;

  . the distribution of a Like Amount of the trust debentures to the holders
    of the trust securities, if the Company has given written directions to
    the property trustee to dissolve the trust;

  . expiration of the term of the trust;

  . redemption of all of the trust securities as described under "--
    Redemption;" and

  . the entry of an order for the dissolution of the trust by a court of
    competent jurisdiction.

   If a dissolution occurs as described in bullet points one through three
above, the trust shall be liquidated by the administrative trustees as
expeditiously as possible. After satisfaction of liabilities to the trust's
creditors, the administrative trustees will distribute to the holders of the
trust securities a Like Amount of the trust debentures, unless such
distribution is determined by the property trustee not to be practicable. In
such case, the holders will be entitled to receive pro rata out of the assets
of the trust legally available for distribution to holders an amount equal to
the aggregate of the liquidation amount plus accumulated and unpaid
distributions thereon to the date of payment. If this liquidation distribution
can be paid only in part because the trust has insufficient assets on hand
legally available to pay in full the aggregate liquidation distribution, then
the amount payable directly by the trust on the trust securities shall be paid
on a pro rata basis, except that if a debenture event of default has occurred
and is continuing, the preferred securities shall have a priority over the
common securities. See "--Subordination of Common Securities."

   If the Company elects not to prepay the trust debentures prior to maturity
in accordance with their terms and either elects not to or is unable to
dissolve and liquidate the trust and distribute the trust debentures to
holders of the trust securities, the trust securities will remain outstanding
until the repayment of the trust debentures on the stated maturity date.

   After the liquidation date is fixed for any distribution of trust
debentures to holders of the trust securities,

  . the trust securities will no longer be deemed to be outstanding;

  . DTC or its nominee will receive, in respect of each registered global
    certificate, if any, representing trust securities and held by it, a
    registered global certificate or certificates representing the trust
    debentures to be delivered upon such distribution; and

  . any certificates representing trust securities not held by DTC or its
    nominee will be deemed to represent trust debentures having a principal
    amount equal to the liquidation amount of such trust securities, and
    bearing accrued and unpaid interest in an amount equal to the accumulated
    and unpaid distributions on such trust securities until such certificates
    are presented to the administrative trustees or their agent for
    cancellation. At such time, the Company will issue to such holder, and
    the debenture trustee will authenticate, a certificate representing such
    trust debentures.

Subordination of Common Securities

   Payment of distributions on, and the redemption price of, the trust
securities will be made pro rata based on the liquidation amount of the trust
securities. However, if on any distribution date or redemption date a
debenture event of default has occurred and is continuing, no payment of any
distribution on, or applicable redemption price of, any of the common
securities, and no other payment on account of the redemption,

                                      23
<PAGE>

liquidation or other acquisition of the common securities, will be made unless
payment in full in cash of all accumulated and unpaid distributions on all of
the outstanding preferred securities for all distribution periods terminating
on or prior thereto, or in the case of payment of the applicable redemption
price the full amount of such redemption price, shall have been made or
provided for, and all funds available to the property trustee shall first be
applied to the payment in full in cash of all distributions on, or redemption
price of, the preferred securities then due and payable.

   In the case of any event of default under the trust agreement, the Company,
as holder of the common securities, will be deemed to have waived any right to
act with respect to such event of default until the effect of such event of
default with respect to the preferred securities shall have been cured, waived
or otherwise eliminated. Until any such event of default has been so cured,
waived or otherwise eliminated, the property trustee shall act solely on behalf
of the holders of the preferred securities and not on behalf of the Company as
holder of the common securities, and only the holders of the preferred
securities will have the right to direct the property trustee to act on their
behalf.

Events of Default; Notice

   The occurrence of a debenture event of default constitutes an event of
default under the trust agreement. See "Description of Trust Debentures--
Debenture Events of Default."

   Within five business days after the occurrence of any trust agreement event
of default actually known to the property trustee, the property trustee shall
transmit notice of such trust agreement event of default to the holders of the
preferred securities, the administrative trustees and the Company, unless such
trust agreement event of default shall have been cured or waived. The Company
and the administrative trustees are required to file annually with the property
trustee a certificate as to whether or not they are in compliance with all the
conditions and covenants applicable to them under the trust agreement.

   Upon the occurrence of a trust agreement event of default, the debenture
trustee or the property trustee as the holder of the trust debentures will have
the right under the debenture indenture to declare the principal of and
interest on the trust debentures to be immediately due and payable.

   If a trust agreement event of default occurs and is continuing, then the
holders of a majority in aggregate liquidation amount of preferred securities
have the right to direct the exercise of any trust or power conferred upon the
property trustee under the trust agreement, including the right to direct the
property trustee under the trust agreement to exercise the remedies available
to it as holder of the trust debentures. If the property trustee fails to
enforce its rights with respect to the trust debentures held by the trust, any
record holder of preferred securities may, to the fullest extent permitted by
law, institute legal proceedings directly against the Company to enforce the
property trustee's rights under such trust debentures without first instituting
any legal proceedings against such property trustee or any other person or
entity. In addition, if a trust agreement event of default has occurred and is
continuing and such event is attributable to the failure of the Company to pay
interest, principal or other required payments on the trust debentures issued
to the trust on the date such interest, principal or other payment is otherwise
payable, then a record holder of preferred securities may, on or after the
respective due dates specified in the trust debentures, institute a proceeding
directly against the Company for enforcement of payment on trust debentures
having a principal amount equal to the aggregate liquidation amount of the
preferred securities held by such holder. In connection with such an action,
the Company will be subrogated to the rights of such record holder of preferred
securities to the extent of any payment made by the Company to such record
holder of preferred securities.

   If a debenture event of default has occurred and is continuing, the
preferred securities shall have a preference over the common securities as
described under "--Liquidation of the Trust and Distribution of Trust
Debentures" and "--Subordination of Common Securities."


                                       24
<PAGE>

Removal of Issuer Trustees

   Unless a debenture event of default shall have occurred and be continuing,
any issuer trustee may be removed at any time by the holder of the common
securities. If a debenture event of default has occurred and is continuing, the
property trustee and the Delaware trustee may be removed at such time by the
holders of a majority in liquidation amount of the outstanding preferred
securities. In no event will the holders of the preferred securities have the
right to vote to appoint, remove or replace the administrative trustees, which
voting rights are vested exclusively in the holder of the common securities. No
resignation or removal of an issuer trustee and no appointment of a successor
trustee shall be effective until the acceptance of appointment by the successor
trustee in accordance with the provisions of the trust agreement.

Mergers, Consolidations, Amalgamations or Replacements of the Trust

   The trust may not merge with or into, convert into, consolidate, amalgamate,
or be replaced by, or convey, transfer or lease its properties and assets as an
entirety or substantially as an entirety to any corporation or other person,
except as described below or as otherwise described under "--Liquidation of the
Trust and Distribution of Trust Debentures." The trust may, at the request of
the Company with the consent of the administrative trustees and without the
consent of the holders of the preferred securities, the Delaware trustee or the
property trustee, merge with or into, convert into, consolidate, amalgamate, or
be replaced by or convey, transfer or lease its properties and assets as an
entirety or substantially as an entirety to a trust organized as such under the
laws of any State; provided that:

  . such successor entity either:

    . expressly assumes all of the obligations of the trust with respect to
      the trust securities and the trust agreement; or

    . substitutes for the trust securities other securities having
      substantially the same terms as the trust securities (the "Successor
      Securities") so long as the Successor Securities rank the same as the
      trust securities rank in priority with respect to distributions and
      payments upon liquidation, redemption and otherwise;

  . the Company expressly appoints a trustee of such successor entity
    possessing the same powers and duties as the property trustee as the
    holder of the trust debentures;

  . the Successor Securities are listed, or any Successor Securities will be
    listed upon notification of issuance, on any national securities exchange
    or other organization on which the trust securities are then listed or
    quoted, if any;

  . if the preferred securities (including any Successor Securities) are
    rated by any nationally recognized statistical rating organization prior
    to such transaction, such merger, consolidation, amalgamation,
    replacement, conveyance, transfer or lease does not cause the preferred
    securities (including any Successor Securities) or, if the trust
    debentures are so rated, the trust debentures, to be downgraded by any
    such nationally recognized statistical rating organization;

  . such merger, conversion, consolidation, amalgamation, replacement,
    conveyance, transfer or lease does not adversely affect the rights,
    preferences and privileges of the holders of the trust securities
    (including any Successor Securities) in any material respect;

  . such successor entity has a purpose substantially identical to that of
    the trust;

  . prior to such merger, consolidation, amalgamation, replacement,
    conveyance, transfer or lease, the Company has received an opinion from
    independent counsel to the trust experienced in such matters to the
    effect that:

    . such merger, consolidation, amalgamation, replacement, conveyance,
      transfer or lease does not adversely affect the rights, preferences
      and privileges of the holders of the trust securities (including any
      Successor Securities) in any material respect; and

                                       25
<PAGE>

    . following such merger, conversion, consolidation, amalgamation,
      replacement, conveyance, transfer or lease,

      . neither the trust nor such successor entity will be required to
        register as an investment company under the Investment Company Act
        of 1940, as amended; and

      . the trust or the successor entity will continue to be classified
        as a grantor trust for United States federal income tax purposes;

  . the Company or any permitted successor or assignee owns all of the common
    securities of such successor entity and guarantees the obligations of
    such successor entity under the Successor Securities at least to the
    extent provided by the guarantee and the common guarantee; and

  . there shall have been furnished to the property trustee an officer's
    certificate and an opinion of counsel, each to the effect that all
    conditions precedent in the trust agreement to such transaction have been
    satisfied.

   Notwithstanding the foregoing, the trust shall not, except with the consent
of holders of 100% in liquidation amount of the trust securities, consolidate,
amalgamate, merge with or into, convert into, or be replaced by or convey,
transfer or lease its properties and assets as an entirety or substantially as
an entirety to, any other entity or permit any other entity to consolidate,
amalgamate, merge with or into, or replace it if such consolidation,
amalgamation, merger, replacement, conveyance, transfer or lease would cause
the trust or the successor entity not to be classified as a grantor trust for
United States federal income tax purposes or would cause the holders of the
trust securities not to be treated as owning an undivided interest in the trust
debentures.

Voting Rights; Amendment of the Trust Agreement

   Except as provided below and under "--Mergers, Consolidations, Amalgamations
or Replacements of the Trust" and "Description of Guarantee--Amendments and
Assignment" and as otherwise required by law and the trust agreement, the
holders of the preferred securities will have no voting rights.

   The trust agreement may be amended from time to time by the Company and the
administrative trustees, without the consent of the holders of the trust
securities:

  . to cure any ambiguity, correct or supplement any provisions in the trust
    agreement that may be inconsistent with any other provision, or to make
    any other provisions with respect to matters or questions arising under
    the trust agreement, which shall not be inconsistent with the other
    provisions of the trust agreement; or

  . to modify, eliminate or add to any provisions of the trust agreement to
    such extent as shall be necessary to ensure that the trust will be
    classified for United States federal income tax purposes as a grantor
    trust at all times that any trust securities are outstanding or to ensure
    that the trust will not be required to register as an "investment
    company" under the Investment Company Act;

provided, however, that in each such case the interests of the holders of the
trust securities shall not be adversely affected in any material respect. Any
amendments of the trust agreement pursuant to the foregoing shall become
effective once notice is given to the holders of the trust securities.

   The trust agreement may be amended by the issuer trustees and the Company:

  . with the consent of holders representing a majority (based upon
    liquidation amount) of the outstanding trust securities; and

  . upon receipt by the issuer trustees of an opinion of counsel experienced
    in such matters to the effect that such amendment or the exercise of any
    power granted to the issuer trustees in accordance with such amendment
    will not affect the trust's status as a grantor trust for United States
    federal income tax

                                       26
<PAGE>

    purposes or the trust's exemption from status as an "investment company"
    under the Investment Company Act;

provided that, without the consent of each holder of trust securities, the
trust agreement may not be amended to:

  . change the amount or timing of any distribution on the trust securities
    or otherwise adversely affect the amount of any distribution required to
    be made in respect of the trust securities as of a specified date; or

  . restrict the right of a holder of trust securities to institute suit for
    the enforcement of any such payment on or after such date.

   So long as any trust debentures are held by the trust, the issuer trustees
shall not:

  . direct the time, method and place of conducting any proceeding for any
    remedy available to the debenture trustee, or executing any trust or
    power conferred on the debenture trustee with respect to the trust
    debentures;

  . waive any past defaults under the indenture;

  . exercise any right to rescind or annul a declaration of acceleration of
    the maturity of the principal of the trust debentures; or

  . consent to any amendment, modification or termination of the indenture or
    the trust debentures, where such consent shall be required, without, in
    each case, obtaining the prior approval of the holders of a majority in
    liquidation amount of all outstanding preferred securities.

However, where a consent under the indenture would require the consent of each
holder of trust debentures affected thereby, no such consent shall be given by
the property trustee without the prior consent of each holder of the preferred
securities. The issuer trustees shall not revoke any action previously
authorized or approved by a vote of the holders of the preferred securities
except pursuant to a subsequent vote of such holders. The property trustee
shall notify each holder of preferred securities of any notice of default which
it receives with respect to the trust debentures. In addition to obtaining the
foregoing approvals of the holders of the preferred securities, prior to taking
any of the foregoing actions, the issuer trustees shall obtain an opinion of
counsel experienced in such matters to the effect that the trust will not fail
to be classified as a grantor trust for United States federal income tax
purposes on account of such action.

   Any required approval of holders of preferred securities may be given at a
meeting of such holders convened for such purpose or pursuant to written
consent (without prior notice). The property trustee will cause a notice of any
meeting at which holders of preferred securities are entitled to vote to be
given to each holder of record of preferred securities in the manner set forth
in the trust agreement.

   No vote or consent of the holders of preferred securities will be required
for the trust to redeem and cancel the preferred securities in accordance with
the trust agreement.

   Notwithstanding that holders of the preferred securities are entitled to
vote or consent under any of the circumstances described above, any of the
preferred securities that are owned by the Company, the issuer trustees or any
affiliate of the Company or any issuer trustee shall not be entitled to vote or
consent and shall, for purposes of such vote or consent, be treated as if they
were not outstanding.

Payment and Paying Agency

   Payments in respect of preferred securities held in global form shall be
made to the depositary, which shall credit the relevant accounts at the
depositary on the applicable distribution dates, or in respect of preferred
securities that are not held by the depositary, such payments shall be made by
check mailed to the address of the holder entitled thereto as such address
shall appear on the register. The paying agent shall initially be the

                                       27
<PAGE>

property trustee or an affiliate of the property trustee and any co-paying
agent chosen by the property trustee and acceptable to the administrative
trustees and the Company. The paying agent shall be permitted to resign as
paying agent upon 30 days' written notice to the property trustee, the
administrative trustees and the Company. In the event that the property trustee
or an affiliate of the property trustee shall no longer be the paying agent,
the administrative trustees shall appoint a successor (which shall be a bank or
trust company acceptable to the administrative trustees and the Company) to act
as paying agent.

Form, Denomination, Book-Entry Procedures and Transfer

   Unless otherwise specified in the applicable prospectus supplement, the
preferred securities will be in registered, global form. The global preferred
securities will be deposited upon issuance with DTC, in New York, New York, and
registered in the name of DTC or its nominee, in each case for credit to an
account of a direct or indirect participant in DTC as described below.

   A global preferred security may not be transferred as a whole except by DTC
to another nominee of DTC or to a successor of DTC or its nominee. Beneficial
interests in the global preferred securities shall be transferred and exchanged
through the facilities of DTC. Beneficial interests in the global preferred
securities may not be exchanged for preferred securities in certificated form
except in the limited circumstances described below. See "--Exchange of Book-
Entry Preferred Securities for Certificated Preferred Securities."

Depositary Procedures

   DTC has advised the trust and the Company that DTC is a limited-purpose
trust company organized under the laws of the State of New York, a member of
the Federal Reserve System, a "clearing corporation" within the meaning of the
Uniform Commercial Code and a "clearing agency," registered pursuant to the
provisions of Section 17A of the Exchange Act. DTC was created to hold
securities for its participating organizations and to facilitate the clearance
and settlement of transactions in those securities between participants through
electronic book-entry changes in accounts of its participants. The participants
include securities brokers and dealers, banks, trust companies, clearing
corporations and certain other organizations. Indirect access to DTC's system
is also available to other entities such as banks, brokers, dealers and trust
companies that clear through or maintain a custodial relationship with a
participant, either directly or indirectly. Persons who are not participants
may beneficially own securities held by or on behalf of DTC only through the
participants or the indirect participants of DTC. The ownership interest and
transfer of ownership interest of each actual purchaser of each security held
by or on behalf of DTC are recorded on the records of the participants and the
indirect participants.

   DTC has also advised the trust and the Company that, pursuant to procedures
established by it:

  . upon deposit of the global preferred securities, DTC will credit the
    accounts of participants designated by the exchange agent with portions
    of the liquidation amount of the global preferred securities; and

  . ownership of such interests in the global preferred securities will be
    shown on, and the transfer of ownership thereof will be effected only
    through, records maintained by DTC (with respect to the participants) or
    by the participants and indirect participants (with respect to other
    owners of beneficial interests in the global preferred securities).

   Investors in the global preferred securities may hold their interests
therein directly through DTC if they are participants in such system, or
indirectly through organizations which are participants in such system. All
interests in a global preferred security will be subject to the procedures and
requirements of DTC. Those interests held through Euroclear or Cedel Bank may
also be subject to the procedures and requirements of such system. The laws of
some states require that certain persons take physical delivery in certificated
form of securities that they own. Consequently, the ability to transfer
beneficial interests in a global preferred security to such persons will be
limited to that extent. Because DTC can act only on behalf of participants,
which in turn act on behalf of indirect participants and certain banks, the
ability of a person having beneficial interests in

                                       28
<PAGE>

a global preferred security to pledge such interests to persons or entities
that do not participate in the DTC system, or otherwise take actions in respect
of such interests, may be affected by the lack of a physical certificate
evidencing such interests. For certain other restrictions on the
transferability of the preferred securities, see "--Exchange of Book-Entry
Preferred Securities for Certificated Preferred Securities."

   Except as described below, owners of interests in the global preferred
securities will not have preferred securities registered in their name, will
not receive physical delivery of preferred securities in certificated form and
will not be considered the registered owners or holders thereof under the trust
agreement for any purpose.

   Payments in respect of each global preferred security registered in the name
of DTC or its nominee will be payable by the property trustee to DTC in its
capacity as the registered holder under the trust agreement. Under the terms of
the trust agreement, the property trustee will treat the persons in whose names
the preferred securities, including the global preferred securities, are
registered as the owners thereof for the purpose of receiving such payments and
for any and all other purposes whatsoever. Consequently, neither the property
trustee nor any agent thereof has or will have any responsibility or liability
for:

  . any aspect of DTC's records or any participant's or indirect
    participant's records relating to or payments made on account of
    beneficial ownership interests in the global preferred securities, or for
    maintaining, supervising or reviewing any of DTC's records or any
    participant's or indirect participant's records relating to the
    beneficial ownership interests in the global preferred securities; or

  . any other matter relating to the actions and practices of DTC or any of
    its participants or indirect participants.

   DTC has advised the trust and the Company that its current practice, upon
receipt of any payment in respect of securities such as the preferred
securities, is to credit the accounts of the relevant participants with the
payment on the payment date, in amounts proportionate to their respective
holdings in liquidation amount of beneficial interests in the relevant security
as shown on the records of DTC unless DTC has reason to believe it will not
receive payment on such payment date. Payments by the participants and the
indirect participants to the beneficial owners of preferred securities
represented by global preferred securities will be governed by standing
instructions and customary practices and will be the responsibility of the
participants or the indirect participants and will not be the responsibility of
DTC, the property trustee, the trust or the Company. None of the trust, the
Company or the property trustee will be liable for any delay by DTC or any of
its participants in identifying the beneficial owners of the preferred
securities, and the trust, the Company and the property trustee may
conclusively rely on and will be protected in relying on instructions from DTC
or its nominee for all purposes.

   Interests in the global preferred securities will trade in DTC's Same-Day
Funds Settlement System, and secondary market trading activity in such
interests will therefore settle in immediately available funds, subject in all
cases to the rules and procedures of DTC and its participants. Transfers
between participants in DTC will be effected in accordance with DTC's
procedures, and will be settled in same-day funds.

   DTC has advised the trust and the Company that it will take any action
permitted to be taken by a holder of preferred securities only at the direction
of one or more participants to whose account with DTC interests in the global
preferred securities are credited and only in respect of such portion of the
liquidation amount of the preferred securities as to which such participant or
participants has or have given such direction. However, if there is an event of
default under the trust agreement, DTC reserves the right to exchange the
global preferred securities for preferred securities in certificated form and
to distribute such preferred securities to its participants.

   The information in this section concerning DTC and its book-entry system has
been obtained from sources that the trust and the Company believe to be
reliable, but neither the trust nor the Company takes responsibility for the
accuracy thereof.


                                       29
<PAGE>

   Although DTC has agreed to the foregoing procedures to facilitate transfers
of interest in the global preferred securities among participants in DTC, it is
under no obligation to perform or to continue to perform such procedures, and
such procedures may be discontinued at any time. None of the trust, the Company
or the property trustee will have any responsibility for the performance by DTC
or their respective participants or indirect participants of their respective
obligations under the rules and procedures governing their operations.

Exchange of Book-Entry Preferred Securities for Certificated Preferred
Securities

   A global preferred security is exchangeable for preferred securities in
certificated form if:

  . DTC notifies the trust that it is unwilling or unable to continue as
    depositary for the global preferred security or has ceased to be a
    clearing agency registered under the Exchange Act, and the trust fails to
    appoint a successor depositary within 90 days;

  . the Company, on behalf of the trust, in its sole discretion elects to
    cause the issuance of the preferred securities in certificated form; or

  . there shall have occurred and be continuing an event of default under the
    trust agreement.

   In addition, beneficial interests in a global preferred security may be
exchanged for certificated preferred securities upon request but only upon at
least 20 days' prior written notice given to the property trustee by or on
behalf of DTC in accordance with customary procedures. In all cases,
certificated preferred securities delivered in exchange for any global
preferred security or beneficial interests therein will be registered in the
names, and issued in any approved denominations, requested by or on behalf of
the depositary (in accordance with its customary procedures).

Registrar and Transfer Agent

   The property trustee will act as registrar and transfer agent for the
preferred securities.

   Registration of transfers of the preferred securities will be effected
without charge by or on behalf of the trust, but upon payment of any tax or
other governmental charges that may be imposed in connection with any transfer
or exchange. The trust will not be required to register or cause to be
registered the transfer of the preferred securities after they have been called
for redemption.

Information Concerning the Property Trustee

   The property trustee, other than during the occurrence and continuance of a
trust agreement event of default, undertakes to perform only such duties as are
specifically set forth in the trust agreement and, during the existence of a
trust agreement event of default, must exercise the same degree of care and
skill as a prudent person would exercise or use in the conduct of his or her
own affairs. Subject to this provision, the property trustee is under no
obligation to exercise any of the powers vested in it by the trust agreement at
the request of any holder of trust securities unless it is offered reasonable
indemnity against the costs, expenses and liabilities that might be incurred
thereby. If no trust agreement event of default has occurred and is continuing
and the property trustee is required to decide between alternative courses of
action, construe ambiguous provisions in the trust agreement or is unsure of
the application of any provision of the trust agreement, and the matter is not
one on which holders of the preferred securities or the common securities are
entitled under the trust agreement to vote, then the property trustee shall
take such action as is directed by the Company and, if not so directed, shall
take such action as it deems advisable and in the best interests of the holders
of the trust securities and will have no liability except for its own bad
faith, negligence or willful misconduct.

   Bank One Trust Company, NA will serve as the property trustee, the debenture
trustee and the guarantee trustee. Bank One Delaware, Inc. will serve as the
Delaware trustee. The Company and certain of its

                                       30
<PAGE>

subsidiaries from time to time borrow money from, and maintain deposit accounts
and conduct certain banking transactions with, Bank One, National Association
in the ordinary course of their business. Bank One, National Association also
serves as agent and is a lender under the Company's bank credit facility.

Miscellaneous

   The administrative trustees are authorized and directed to conduct the
affairs of and to operate the trust in such a way that the trust will not be
deemed to be an "investment company" required to be registered under the
Investment Company Act or classified as an association taxable as a corporation
for United States federal income tax purposes and so that the trust debentures
will be treated as indebtedness of the Company for United States federal income
tax purposes. In this connection, the Company and the administrative trustees
are authorized to take any action, not inconsistent with applicable law, the
certificate of trust of the trust or the trust agreement, that the Company and
the administrative trustees determine in their discretion to be necessary or
desirable for such purposes, as long as such action does not materially
adversely affect the interests of the holders of the trust securities.

   The trust agreement and the preferred securities will be governed by and
construed in accordance with the internal laws of the State of Delaware.

                        DESCRIPTION OF TRUST DEBENTURES

   The trust debentures will be issued under a debenture indenture, as
supplemented or amended from time to time to be entered into between the
Company and The First National Bank of Chicago, as debenture trustee. The
debenture indenture will be qualified under the Trust Indenture Act of 1939.
This summary of certain terms and provisions of the trust debentures and the
debenture indenture does not purport to be complete and is subject to and is
qualified in its entirety by reference to the debenture indenture and those
terms made a part of the debenture indenture by the Trust Indenture Act.

General

   The trust will invest the proceeds obtained from any issuance of preferred
securities, together with the consideration paid by the Company for the common
securities, in trust debentures issued by the Company. The trust debentures
will bear interest from the same date and at the same rate as the preferred
securities. It is anticipated that, until the liquidation, if any, of the
trust, each trust debenture will be held in the name of the property trustee in
trust for the benefit of the holders of the trust securities.

   The trust debentures will be issued in denominations of $1,000 and integral
multiples thereof. The trust debentures will mature on the date provided.

   The trust debentures will rank equally with all other debentures and will be
unsecured and subordinate and junior in right of payment to all Senior
Indebtedness to the extent and in the manner set forth in the debenture
indenture. See "--Subordination."

Subordination

   In the debenture indenture, the Company has covenanted and agreed that any
trust debentures issued under the debenture indenture will be subordinate and
junior in right of payment to all Senior Indebtedness. Upon any payment or
distribution of assets to creditors upon any liquidation, dissolution, winding
up, reorganization, or in connection with any insolvency, receivership or
bankruptcy proceeding of the Company, all Senior Indebtedness must be paid in
full before the holders of trust debentures will be entitled to receive or
retain any payment in respect thereof.

                                       31
<PAGE>

   In the event of the acceleration of the maturity of trust debentures, the
holders of all Senior Indebtedness outstanding at the time of such acceleration
will first be entitled to receive payment in full of such Senior Indebtedness
before the holders of trust debentures will be entitled to receive or retain
any payment in respect of the trust debentures.

   No payments on account of principal, or premium, or interest, if any, in
respect of the trust debentures may be made if a default in any payment with
respect to Senior Indebtedness has occurred and is continuing, or an event of
default with respect to any Senior Indebtedness resulting in the acceleration
of the maturity thereof, or if any judicial proceeding shall be pending with
respect to any such default.

   "Indebtedness" means:

  . every obligation of the Company for money borrowed;

  . every obligation of the Company evidenced by bonds, debentures, notes or
    other similar instruments, including obligations incurred in connection
    with the acquisition of property, assets or businesses;

  . every reimbursement obligation of the Company with respect to letters of
    credit, banker's acceptances or similar facilities issued for the account
    of the Company;

  . every obligation of the Company issued or assumed as the deferred
    purchase price of property or services (but excluding trade accounts
    payable or accrued liabilities arising in the ordinary course of
    business);

  . every capital lease obligation of the Company;

  . all indebtedness of the Company whether incurred on or prior to the date
    of the debenture indenture or thereafter incurred, for claims in respect
    of derivative products, including interest rate, foreign exchange rate
    and commodity forward contracts, options and swaps and similar
    arrangements; and

  . every obligation of the type referred to in the preceding bullet points
    of another person and all dividends of another person the payment of
    which, in either case, the Company has guaranteed or is responsible or
    liable, directly or indirectly, as obligor or otherwise.

   "Indebtedness Ranking on a Parity with the Trust Debentures" means:

  . Indebtedness, whether outstanding on the date of execution of the
    debenture indenture or thereafter created, assumed or incurred, to the
    extent such Indebtedness specifically by its terms ranks equally with and
    not prior to the trust debentures in right of payment upon the happening
    of the dissolution or winding-up or liquidation or reorganization of the
    Company; and

  . all other debt securities, and guarantees in respect of those debt
    securities (including other debentures and other guarantees), issued to
    any other trust, or a trustee of such trust, partnership or other entity
    affiliated with the Company that is a financing vehicle of the Company in
    connection with the issuance by such financing vehicle of equity
    securities that are similar to the preferred securities or other
    securities guaranteed by the Company.

The securing of any Indebtedness, otherwise constituting Indebtedness Ranking
on a Parity with the Trust Debentures, will not be deemed to prevent such
Indebtedness from constituting Indebtedness Ranking on a Parity with the Trust
Debentures.

   "Indebtedness Ranking Junior to the Trust Debentures" means any
Indebtedness, whether outstanding on the date of execution of the debenture
indenture or thereafter created, assumed or incurred, to the extent such
Indebtedness specifically by its terms ranks junior to and not equally with or
prior to the trust debentures (and any other Indebtedness Ranking on a Parity
with the Trust Debentures) in right of payment upon the happening of the
dissolution or winding-up or liquidation or reorganization of the Company. The
securing of any

                                       32
<PAGE>

Indebtedness, otherwise constituting Indebtedness Ranking Junior to the Trust
Debentures shall not be deemed to prevent such Indebtedness from constituting
Indebtedness Ranking Junior to the Trust Debentures.

   "Senior Indebtedness" means all Indebtedness, whether outstanding on the
date of execution of the debenture indenture or thereafter created, assumed or
incurred, except Indebtedness Ranking on a Parity with the Trust Debentures or
Indebtedness Ranking Junior to the Trust Debentures, and any deferrals,
renewals or extensions of such Senior Indebtedness.

   The Company is a holding company and all of the operating assets of the
Company are owned by the Company's subsidiaries. The Company relies primarily
on dividends from its subsidiaries to meet its obligations for payment of
principal and interest on its outstanding debt obligations and corporate
expenses. The Company is a legal entity separate and distinct from its
subsidiaries. Holders of trust debentures should look only to the Company for
payments on the trust debentures.

   Because the Company is a holding company, the right of the Company to
participate in any distribution of assets of any subsidiary upon such
subsidiary's liquidation or reorganization or otherwise (and thus the ability
of holders of the preferred securities to benefit indirectly from such
distribution), is subject to the prior claims of creditors of that subsidiary,
except to the extent the Company may itself be recognized as a creditor of that
subsidiary. Accordingly, the trust debentures will be effectively subordinated
to all existing and future liabilities of the Company's subsidiaries and all
liabilities of any future subsidiaries of the Company. The debenture indenture
does not limit the incurrence or issuance of other secured or unsecured debt of
the Company or any subsidiary, including Senior Indebtedness.

Option to Extend Interest Payment Date

   So long as no debenture event of default has occurred and is continuing, the
Company will have the right under the debenture indenture at any time and from
time to time during the term of the trust debentures to defer the payment of
interest for a period not exceeding 10 consecutive semi-annual periods.
However, no deferral period shall end on a date other than an interest payment
date or extend beyond the stated maturity date. At the end of such deferral
period, the Company must pay all interest then accrued and unpaid.

   During any such deferral period, the Company may not, and will not permit
any subsidiary of the Company to:

  . declare or pay any dividends or distributions on, or redeem, purchase,
    acquire, or make a liquidation payment with respect to, any of the
    Company's capital stock (other than (a) dividends or distributions in
    shares of, or options, warrants or rights to subscribe for or purchase
    shares of, common stock, (b) any declaration of a dividend in connection
    with the implementation of a shareholders' rights plan, or the issuance
    of stock under any such plan in the future, or the redemption or
    repurchase of any such rights pursuant thereto, (c) as a result of a
    reclassification of the Company's capital stock or the exchange or
    conversion of one class or series of the Company's capital stock for
    another class or series of the Company's capital stock, (d) the purchase
    of fractional interests in shares of the Company's capital stock pursuant
    to the conversion or exchange provisions of such capital stock or the
    security being converted or exchanged, and (e) purchases of common stock
    related to the issuance of common stock or rights under any of the
    Company's benefit plans for its directors, officers or employees or any
    of the Company's dividend reinvestment plans);

  . make any payment of principal of, or premium, if any, or interest on or
    repay, repurchase or redeem any debt securities of the Company (including
    other debentures) that rank pari passu with or junior in right of payment
    to the trust debentures; or

  . make any guarantee payments (other than payments under the guarantee)
    with respect to any guarantee by the Company of the debt securities of
    any subsidiary of the Company (including other guarantees)

                                       33
<PAGE>

    if such guarantee ranks pari passu with or junior in right of payment to
    the trust debentures.

   Prior to the termination of any deferral period, the Company may further
extend such deferral period, so long as such extension does not cause such
deferral period to exceed 10 consecutive semi-annual periods, end on a date
other than an interest payment date or extend beyond the stated maturity date.
Upon the termination of any deferral period and the payment of all amounts then
due on any interest payment date, the Company may elect to begin a new deferral
period, subject to the above requirements. No interest shall be due and payable
during a deferral period, except at the end thereof. The Company must give the
property trustee, the administrative trustees and the debenture trustee notice
of its election to defer payment of interest on the trust debentures at least
five business days prior to the earlier of:

  . the date the distributions on the trust securities would have been
    payable except for the election to begin or extend such deferral period;
    or

  . the date the administrative trustees are required to give notice to any
    securities exchange or to holders of capital securities of the record
    date or the date such distributions are payable, but in any event not
    less than five business days prior to such record date. The property
    trustee shall give notice of the Company's election to begin or extend a
    new deferral period to the holders of the preferred securities. There is
    no limitation on the number of times that the Company may elect to begin
    a deferral period. Accordingly, there could be multiple deferral periods
    of varying lengths throughout the term of the trust debentures.

Optional Prepayment

   The trust debentures may be prepayable, in whole at any time or in part from
time to time, at the option of the Company at a prepayment price to the extent
and as set forth in a prospectus supplement.

Special Event Prepayment

   If a Special Event occurs and is continuing, the Company may, at its option,
prepay the trust debentures in whole (but not in part) at any time within 90
days of the occurrence of such Special Event, at a prepayment price equal to
100% of the principal amount of the trust debentures to be redeemed plus
accrued and unpaid interest thereon (including Additional Sums, if any) to the
date of redemption.

   A "Special Event" means a Tax Event or an Investment Company Event.

   "Investment Company Event" means the receipt by the trust and the Company of
an opinion of counsel from counsel experienced in such matters to the effect
that, as a result of the occurrence of a change in law or regulation or a
written change (including any announced prospective change) in interpretation
or application of law or regulation by any legislative body, court,
governmental agency or regulatory authority, which amendment or change is
effective or which pronouncement or decision is announced on or after the date
of original issuance of the preferred securities, there is more than an
insubstantial risk that the trust is or will be considered an "investment
company" that is required to be registered under the Investment Company Act,
which change or prospective change becomes effective or would become effective,
as the case may be, on or after the date of the original issuance of the
preferred securities.

   A "Tax Event" means the receipt by the Company and the trust of an opinion
of counsel experienced in such matters to the effect that, as a result of any
amendment to, or change (including any announced prospective change) in, the
laws (or any regulations thereunder) of the United States or any political
subdivision or taxing authority thereof or therein, or as a result of any
amendment or change in any official administrative pronouncement or judicial
decision interpreting or applying such laws or regulations, which

                                       34
<PAGE>

amendment or change is effective or such pronouncement or decision is announced
on or after the issue date, there is more than an insubstantial risk that (i)
the trust is, or will be within 90 days of the date of such opinion, subject to
United States federal income tax with respect to income received or accrued on
the trust debentures, (ii) interest payable by the Company on the trust
debentures is not, or within 90 days of the date of such opinion will not be,
deductible by the Company, in whole or in part, for United States federal
income tax purposes, or (iii) the trust is, or will be within 90 days of the
date of such opinion, subject to more than a de minimis amount of other taxes,
duties or other governmental charges.

   Notice of any prepayment will be mailed at least 30 days but not more than
60 days before the redemption date to each holder of trust debentures to be
prepaid at its registered address. Unless the Company defaults in payment of
the prepayment price, on and after the prepayment date interest ceases to
accrue on such trust debentures called for prepayment.

Additional Sums

   If the trust is required to pay any additional taxes, duties or other
governmental charges as a result of a Tax Event, the Company will pay as
additional amounts on the trust debentures such additional amounts as may be
necessary in order that the amount of distributions then due and payable by the
trust on the outstanding trust securities shall not be reduced as a result of
any such additional taxes, duties and other governmental charges.

Certain Covenants of the Company

   The Company covenants in the debenture indenture that if and so long as the
trust is the holder of all trust debentures, the Company, as borrower, will pay
to the trust all fees and expenses related to the trust and the offering of the
trust securities and will pay, directly or indirectly, all ongoing costs,
expenses and liabilities of the trust (including any taxes, duties, assessments
or governmental charges of whatever nature (other than withholding taxes)
imposed by the United States or any domestic taxing authority upon the trust
but excluding obligations under the trust securities).

   The Company also covenants that it will not, and will not permit any
subsidiary of the Company to:

  . declare or pay any dividends or distributions on, or redeem, purchase,
    acquire, or make a liquidation payment with respect to, any of the
    Company's capital stock (subject to certain exceptions);

  . make any payment of principal, interest or premium, if any, on or repay
    or repurchase or redeem any debt securities of the Company (including
    other debentures) that rank pari passu with or junior in right of payment
    to the trust debentures; or

  . make any guarantee payments (other than payments under the guarantee)
    with respect to any guarantee by the Company of the debt securities of
    any subsidiary of the Company (including under other guarantees) if such
    guarantee ranks pari passu or junior in right of payment to the trust
    debentures, if at such time (1) there shall have occurred any event of
    which the Company has actual knowledge that (a) with the giving of notice
    or the lapse of time, or both, would be a debenture event of default and
    (b) in respect of which the Company shall not have taken reasonable steps
    to cure, (2) a debenture event of default shall have occurred and be
    continuing, (3) if such trust debentures are held by the property
    trustee, the Company shall be in default with respect to its payment of
    any obligations under the guarantee or (4) the Company shall have given
    notice of its election of a deferral period as provided in the indenture,
    or such deferral period, or any extension thereof, shall have commenced
    and be continuing.

   So long as the trust securities remain outstanding, the Company also
covenants:

  . to maintain 100% direct or indirect ownership of the common securities;
    provided, however, that any successor of the Company permitted under the
    indenture may succeed to the Company's ownership of such common
    securities;

                                       35
<PAGE>

  . to use its reasonable efforts to cause the trust:

    . to remain a business trust, except in connection with the
      distribution of trust debentures to the holders of trust securities
      in liquidation of the trust, the redemption of all of the trust
      securities, or certain mergers, consolidations or amalgamations, each
      as permitted by the trust agreement; and

    . to otherwise continue to be treated as a grantor trust for United
      States federal income tax purposes; and

  . to use its reasonable efforts to cause each holder of trust securities to
    be treated as owning an undivided beneficial interest in the trust
    debentures.

Modification of Indenture

   From time to time the Company and the debenture trustee may, without the
consent of the holders of trust debentures, amend the debenture indenture for
specified purposes, including, among other things, to cure any ambiguity or to
correct or supplement any provision contained in the debenture indenture or any
supplemental indenture which is defective or inconsistent with any other
provision contained therein (provided that any such action does not materially
adversely affect the interest of the holders of trust debentures) and
qualifying, or maintaining the qualification of, the debenture indenture under
the Trust Indenture Act.

   The debenture indenture contains provisions permitting the Company and the
debenture trustee, with the consent of the holders of a majority in aggregate
principal amount of trust debentures, to amend the debenture indenture in a
manner affecting the rights of the holders of trust debentures. However, no
such modification may, without the consent of the holders of each outstanding
trust debenture so affected:

  . change the stated maturity, or reduce the rate of interest or extend the
    time of payment of interest thereon except pursuant to the Company's
    right under the debenture indenture to defer the payment of interest as
    provided therein (see "--Option to Extend Interest Payment Date") or
    reduce amount of premium on the trust debentures or reduce the amount
    payable on redemption thereof or make the principal of, or interest or
    premium on, the trust debentures payable in any coin or currency other
    than that provided in the trust debentures, or impair or affect the right
    of any holder of trust debentures to institute suit for the payment
    thereof;

  . modify the provisions of the indenture with respect to the subordination
    of the trust debentures in a manner adverse to the holders;

  . reduce the percentage of principal amount of trust debentures, the
    holders of which are required to consent to any such modification of the
    debenture indenture, or are required to consent to any waiver provided
    for in the debenture indenture; or

  . modify certain other provisions of the debenture indenture relating to
    amendments and waivers of holders.

   Notwithstanding the foregoing, if the trust debentures are held by the
trust, an amendment will not be effective until the holders of a majority in
liquidation amount of the trust securities have consented to the amendment.
Further, if the consent of the holders of each trust security is required, an
amendment will not be effective until each holder of the trust securities has
consented to such amendment.

                                       36
<PAGE>

Debenture Events of Default

   The debenture indenture provides that any one or more of the following
described events with respect to the trust debentures constitute a debenture
event of default:

  . failure to pay any interest on the trust debentures or any other
    debentures when due for 30 days (subject to the deferral of any due date
    in the case of an Extension Period); or

  . failure to pay any principal or premium, if any, on the trust debentures
    or any other debentures when due whether at maturity, upon redemption, by
    declaration of acceleration of maturity or otherwise; or

  . failure to perform, or breach of, any other covenant or warranty of the
    Company contained in the indenture for 90 days after written notice to
    the Company from the debenture trustee or the holders of at least 25% in
    aggregate outstanding principal amount of trust debentures; or

  . certain events of bankruptcy, insolvency or reorganization of the
    Company.

   Within five business days after the occurrence of a debenture event of
default actually known to the indenture trustee, the indenture trustee must
transmit notice of such debenture event of default to the debenture holders,
unless such debenture event of default has been cured or waived. The debenture
indenture requires the annual filing by the Company with the debenture trustee
of a certificate as to the absence of certain defaults under the indenture.

   The holders of a majority in aggregate outstanding principal amount of the
trust debentures have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the debenture trustee or
to exercise any trust or power conferred upon the debenture trustee under the
debenture indenture. If a debenture event of default has occurred and is
continuing, the debenture trustee or the holders of not less than 25% in
aggregate outstanding principal amount of the trust debentures may declare the
principal amount on all trust debentures due and payable immediately upon a
debenture event of default and should the debenture trustee or such holders of
trust debentures fail to make such declaration, the holders of not less than
25% in aggregate liquidation amount of the preferred securities will have such
right. The holders of a majority in aggregate outstanding principal amount of
the trust debentures may annul such declaration and waive the default if the
default (other than the non-payment of the principal of the trust debentures
which has become due solely by such acceleration) has been cured and a sum
sufficient to pay all matured installments of interest and principal of, and
premium, if any, due otherwise than by acceleration (with any compounded
interest due thereon) has been deposited with the debenture trustee, and should
the holders of such trust debentures fail to annul such declaration and waive
such default, the holders of a majority in aggregate liquidation amount of the
preferred securities will have such right.

   Prior to the declaration accelerating the maturity of the trust debentures,
the holders of a majority in aggregate outstanding principal amount of the
trust debentures may, on behalf of the holders of all the trust debentures,
waive any past default or debenture event of default and its consequences,
except a default in the payment of principal (or premium, if any) on or
interest (unless such default has been cured and a sum sufficient to pay all
matured installments of interest (and premium, if any) and principal due
otherwise than by acceleration has been deposited with the debenture trustee)
or a default in respect of a covenant or provision which under the debenture
indenture cannot be modified or amended without the consent of the holder of
each outstanding trust debenture affected, and should the holders of such trust
debentures fail to waive such default, the holders of a majority in aggregate
liquidation amount of the preferred securities will have such right.

   In case a debenture event of default shall occur and be continuing, the
property trustee will have the right to declare the principal of and the
interest on such trust debentures and any other amounts payable under the

                                       37
<PAGE>

debenture indenture, to be forthwith due and payable and to enforce its other
rights as a creditor with respect to such trust debentures.

Enforcement of Certain Rights by Holders of Preferred Securities

   If a debenture event of default has occurred and is continuing and is
attributable to the failure of the Company to pay the principal of (or premium,
if any), or interest on the trust debentures on the date such payment is
otherwise required, a holder of preferred securities may institute a direct
action. The Company may not amend the debenture indenture to remove the
foregoing right to bring a direct action without the prior written consent of
the holders of all of the preferred securities. Notwithstanding any payments
made to a holder of preferred securities by the Company in connection with a
direct action, the Company will remain obligated to pay the principal of (or
premium, if any) or interest on the trust debentures, and the Company will be
subrogated to the rights of the holder of such preferred securities with
respect to payments on the preferred securities to the extent of any payments
made by the Company to such holder in any direct action.

   The holders of the preferred securities will not be able to exercise
directly any remedies, other than those set forth in the preceding paragraph,
available to the holders of the trust debentures unless there shall have been
an event of default under the trust agreement. See "Description of Preferred
Securities --Events of Default; Notice."

Consolidation, Merger, Sale of Assets and Other Transactions

   The debenture indenture provides that the Company may not consolidate with
or merge into any other person or convey, transfer or lease its properties as
an entirety or substantially as an entirety to any person, and no person shall
consolidate with or merge into the Company or convey, transfer or lease its
properties as an entirety or substantially as an entirety to the Company,
unless:

  . in case the Company consolidates with or merges into another person or
    conveys, transfers or leases its properties substantially as an entirety
    to any person, the successor person is organized and existing under the
    laws of the United States or any State or the District of Columbia, and
    such successor person expressly assumes the Company's obligations on the
    trust debentures and the indenture;

  . immediately after giving effect thereto, no debenture event of default,
    and no event which, after notice or lapse of time or both, would become a
    debenture event of default, has occurred and is continuing; and

  . certain other procedural conditions prescribed in the indenture are met.

Satisfaction and Discharge

   The debenture indenture provides that when, among other things, all trust
debentures not previously cancelled or delivered to the debenture trustee for
cancellation (i) have become due and payable or (ii) will become due and
payable at maturity or called for redemption within one year, and the Company
deposits or causes to be deposited with the debenture trustee funds, in trust,
for the purpose and in an amount sufficient to pay on the stated maturity date
or upon redemption of all the trust debentures not previously delivered to the
debenture trustee for cancellation, the principal (and premium, if any) and
interest due or to become due on the stated maturity date, or the redemption
date, as the case may be, then the debenture indenture will cease to be of
further effect (except as to the Company's obligations to pay all other sums
due pursuant to the debenture indenture and to provide the officers'
certificates and opinions of counsel described therein), and the Company will
be deemed to have satisfied and discharged the debenture indenture.


                                       38
<PAGE>

Form, Registration and Transfer

   If the trust debentures are distributed to the holders of the trust
securities, the trust debentures may be represented by one or more global
certificates registered in the name of the DTC or its nominee. Under such
circumstances, the depositary arrangements for the trust debentures would be
expected to be substantially similar to those in effect for the preferred
securities. For a description of DTC and the terms of the depositary
arrangements relating to payments, transfers, voting rights, redemptions and
other notices and other matters, see "Description of Preferred Securities--
Form, Denomination, Book-Entry Procedures and Transfer" and"" --Depositary
Procedures."

Payment and Paying Agents

   Payment of principal of (and premium, if any) and interest on trust
debentures will be made at the office of the debenture trustee in Wilmington,
Delaware or at the office of such paying agent or paying agents as the Company
may designate from time to time, except that at the option of the Company
payment of any interest may be made, except in the case of trust debentures in
global form, (i) by check mailed to the address of the holder thereof as such
address shall appear in the register for trust debentures or (ii) by transfer
to an account maintained by the holder thereof, provided that proper transfer
instructions have been received by the relevant record date. Payment of any
interest on any trust debenture will be made to the person in whose name such
trust debenture is registered at the close of business on the record date for
such interest, except in the case of defaulted interest. The Company may at any
time designate additional paying agents or rescind the designation of any
paying agent; however the Company will at all times be required to maintain a
paying agent in each place of payment for the trust debentures.

   Any monies deposited with the debenture trustee or any paying agent for the
payment of the principal of (and premium, if any) or interest on any trust
debenture and remaining unclaimed for two years after such principal (and
premium, if any) or interest has become due and payable shall, at the request
of the Company, be repaid to the Company and the holder of such trust debenture
shall thereafter look only to the Company for payment thereof.

Governing Law

   The debenture indenture and the trust debentures will be governed by and
construed in accordance with the laws of the State of New York.

Information Concerning the Debenture Trustee

   The debenture trustee will be subject to all the duties and responsibilities
specified with respect to an indenture trustee under the Trust Indenture Act of
1939. Subject to such provisions, the debenture trustee is under no obligation
to exercise any of the powers vested in it by the indenture at the request of
any holder of trust debentures, unless offered reasonable indemnity by such
holder against the costs, expenses and liabilities which might be incurred
thereby. The debenture trustee is not required to expend or risk its own funds
or otherwise incur personal financial liability in the performance of its
duties if the debenture trustee reasonably believes that repayment or adequate
indemnity is not reasonably assured to it. Bank One Trust Company, NA will
serve as debenture trustee. See "Description of Preferred Securities--
Information Concerning the Property Trustee."

                            DESCRIPTION OF GUARANTEE

   Set forth below is a summary of information concerning the guarantee, which
will be executed and delivered by the Company for the benefit of the holders
from time to time of preferred securities. The guarantee

                                       39
<PAGE>

will be qualified under the Trust Indenture Act of 1939. Bank One Trust
Company, NA, as the guarantee trustee, will hold the guarantee for the benefit
of the holders of the preferred securities. The following summary is not
necessarily complete, and reference is hereby made to the copy of the form of
the guarantee (including the definitions therein of certain terms), which is
filed as an exhibit to the Registration Statement of which this prospectus
forms a part, and to the Trust Indenture Act of 1939.

General

   The Company will irrevocably and unconditionally agree to pay in full on a
subordinated basis guarantee payments to the holders of the preferred
securities, as and when due, regardless of any defense, right of setoff or
counterclaim that the trust may have or assert other than the defense of
payment. The following payments with respect to the preferred securities, to
the extent not paid by or on behalf of the trust, will be subject to the
guarantee:

  . any accumulated and unpaid distributions required to be paid on the
    preferred securities, to the extent that the trust has funds on hand
    legally available therefor at such time;

  . the applicable redemption price with respect to the preferred securities
    called for redemption, to the extent that the trust has funds on hand
    legally available therefor at such time; and

  . upon a voluntary or involuntary dissolution, winding-up or liquidation of
    the trust (other than in connection with the distribution of the trust
    debentures to holders of the preferred securities), the lesser of:

    . the liquidation distribution, to the extent the trust has funds
      legally available therefor at the time; or

    . the amount of assets of the trust remaining available for
      distribution to holders of preferred securities after satisfaction of
      liabilities to creditors of the trust as required by applicable law.

   The Company's obligation to make a guarantee payment may be satisfied by
direct payment of the required amounts by the Company to the holders of the
preferred securities or by causing the trust to pay such amounts to such
holders.

   The guarantee will be a guarantee of the guarantee payments with respect to
the preferred securities from the time of issuance of the preferred securities,
but will not apply to distributions and other payments on the preferred
securities when the trust does not have sufficient funds legally and
immediately available to make such distributions or other payments. Therefore,
if the Company does not make interest payments on the trust debentures held by
the property trustee, the trust will not make distributions on the preferred
securities.

   The guarantee will rank subordinate and junior in right of payment to all
Senior Indebtedness to the extent provided therein. See "--Status of the
Guarantee." Because the Company is a holding company, the right of the Company
to participate in any distribution of assets of any subsidiary upon such
subsidiary's liquidation or reorganization or otherwise is subject to the prior
claims of creditors of that subsidiary, except to the extent the Company may
itself be recognized as a creditor of that subsidiary. Accordingly, the
Company's obligations under the guarantee effectively will be subordinated to
all existing and future liabilities of the Company's subsidiaries and all
liabilities of any future subsidiaries of the Company. Claimants should look
only to the Company for payments under the guarantee. See "Description of Trust
Debentures --Subordination." The guarantee does not limit the incurrence or
issuance of other secured or unsecured debt of the Company or any subsidiary of
the Company, including Senior Indebtedness, whether under the indenture, any
other indenture that the Company may enter into in the future or otherwise.

   The Company will, through the guarantee, the trust agreement, the trust
debentures and the debenture indenture, taken together, fully, irrevocably and
unconditionally guarantee all of the trust's

                                       40
<PAGE>

obligations under the preferred securities. No single document standing alone
or operating in conjunction with fewer than all of the other documents
constitutes such guarantee. It is only the combined operation of these
documents that has the effect of providing a full, irrevocable and
unconditional guarantee of the trust's obligations under the preferred
securities. See "Relationship Among the Preferred Securities, the Trust
Debentures and the Guarantee."

Status of the Guarantee

   The guarantee will constitute an unsecured obligation of the Company and
will rank subordinate and junior in right of payment to all Senior Indebtedness
in the same manner as the trust debentures. See "Description of Trust
Debentures--Subordination."

   The guarantee will rank equally with all other guarantees issued by the
Company after the issue date with respect to preferred securities, if any,
issued by other trusts. The guarantee will constitute a guarantee of payment
and not of collection. The guarantee will be held for the benefit of the
holders of the preferred securities. The guarantee will not be discharged
except by payment of the guarantee payments in full to the extent not paid by
the trust or upon distribution to the holders of the preferred securities of
the trust debentures. The guarantee does not place a limitation on the amount
of additional Senior Indebtedness that may be incurred by the Company.

Events of Default

   An event of default under the guarantee will occur upon the failure of the
Company to perform any of its payment or other obligations thereunder;
provided, however, that with respect to a default other than a default in
payment of any guarantee payment, the Company shall have received notice of
such default and shall not have cured such default within 60 days after receipt
of such notice. The holders of not less than a majority in liquidation amount
of the preferred securities will have the right to direct the time, method and
place of conducting any proceeding for any remedy available to the guarantee
trustee in respect of the guarantee or to direct the exercise of any trust or
power conferred upon the guarantee trustee under the guarantee.

   Any holder of the preferred securities may institute a legal proceeding
directly against the Company to enforce its rights under the guarantee without
first instituting a legal proceeding against the trust, the guarantee trustee
or any other person or entity.

   The Company, as guarantor, will be required to file annually with the
guarantee trustee a certificate as to whether or not the Company is in
compliance with all the conditions and covenants applicable to it under the
guarantee.

Amendments and Assignment

   Except with respect to any changes that do not materially adversely affect
the rights of holders of the preferred securities (in which case no vote will
be required), the guarantee may be amended only with the prior approval of the
holders of a majority of the liquidation amount of such outstanding preferred
securities. The manner of obtaining any such approval will be as set forth
under "Description of Preferred Securities--Voting Rights; Amendment of the
Trust Agreement." All guarantees and agreements contained in the guarantee
shall bind the successors, assigns, receivers, trustees and representatives of
the Company and shall inure to the benefit of the holders of the preferred
securities then outstanding.

Termination of the Guarantee

   The guarantee will terminate and be of no further force and effect upon:

  . full payment of the applicable redemption price of the preferred
    securities; or


                                       41
<PAGE>

  . upon liquidation of the trust, the full payment of the liquidation
    distribution or the distribution of the trust debentures to the holders
    of the preferred securities.

   The guarantee will continue to be effective or will be reinstated, as the
case may be, if at any time any holder of the preferred securities must
restore payment of any sums paid under the preferred securities or the
guarantee.

Information Concerning the Guarantee Trustee

   The guarantee trustee, other than during the occurrence and continuance of
a default by the Company in performance of the guarantee, will undertake to
perform only such duties as are specifically set forth in the guarantee and,
in case a default with respect to the guarantee has occurred, must exercise
the same degree of care and skill as a prudent person would exercise or use in
the conduct of his or her own affairs. Subject to this provision, the
guarantee trustee will be under no obligation to exercise any of the powers
vested in it by the guarantee at the request of any holder of the preferred
securities unless it is offered reasonable indemnity against the costs,
expenses and liabilities that might be incurred thereby.

Governing Law

   The guarantee will be governed by and construed in accordance with the laws
of the State of New York.

               RELATIONSHIP AMONG THE PREFERRED SECURITIES, THE
                      TRUST DEBENTURES AND THE GUARANTEE

Full and Unconditional Guarantee

   Payments of distributions and other amounts due on the preferred securities
(to the extent the trust has funds on hand legally available for the payment
of such distributions) are irrevocably guaranteed by the Company as and to the
extent set forth under "Description of Guarantee." Taken together, the
Company's obligations under the trust debentures, the debenture indenture, the
trust agreement and the guarantee provide, in the aggregate, a full,
irrevocable and unconditional guarantee of payments of distributions and other
amounts due on the preferred securities. No single document standing alone or
operating in conjunction with fewer than all of the other documents
constitutes such guarantee. It is only the combined operation of these
documents that has the effect of providing a full, irrevocable and
unconditional guarantee of the trust's obligations under the preferred
securities. If and to the extent that the Company does not make the required
payments on the trust debentures, the trust will not have sufficient funds to
make the related payments, including distributions, on the preferred
securities. The guarantee will not cover any such payment when the trust does
not have sufficient funds on hand legally available therefor. In such event,
the remedy of a holder of preferred securities is to institute a direct
action. The obligations of the Company under the guarantee are subordinate and
junior in right of payment to all Senior Indebtedness.

Sufficiency of Payments

   As long as payments of interest and other payments are made when due on the
trust debentures, such payments will be sufficient to cover distributions and
other payments due on the trust securities, primarily because:

  . the aggregate principal amount or prepayment price of the trust
    debentures is equal to the sum of the liquidation amount or redemption
    price, as applicable, of the trust securities;

  . the interest rate and interest and other payment dates on the trust
    debentures will match the distribution rate and distribution and other
    payment dates for the trust securities;


                                      42
<PAGE>

  . the Company shall pay for all and any costs, expenses and liabilities of
    the trust except the trust's obligations to holders of trust securities
    under such trust securities; and

  . the trust agreement will provide that the trust is not authorized to
    engage in any activity that is not consistent with the limited purposes
    thereof.

   Notwithstanding anything to the contrary in the debenture indenture, the
Company has the right to set-off any payment it is otherwise required to make
thereunder with and to the extent the Company has theretofore made, or is
concurrently on the date of such payment making, a payment under the guarantee.

Enforcement Rights of Holders of Preferred Securities

   A holder of any preferred security may institute a legal proceeding directly
against the Company to enforce its rights under the guarantee without first
instituting a legal proceeding against the guarantee trustee, the trust or any
other person or entity.

Limited Purpose of the Trust

   The preferred securities represent preferred undivided beneficial interests
in the assets of the trust, and the trust exists for the sole purpose of:

  . issuing and selling the trust securities;

  . using the proceeds from the sale of the trust securities to acquire the
    trust debentures; and

  . engaging in only those other activities necessary, advisable or
    incidental thereto.

   A principal difference between the rights of a holder of a preferred
security and a holder of a trust debenture is that a holder of a trust
debenture will be entitled to receive from the Company the principal amount of,
and premium, if any, and interest on trust debentures held, while a holder of
preferred securities is entitled to receive distributions from the trust (or,
in certain circumstances, from the Company under the guarantee) if and to the
extent the trust has funds on hand legally available for the payment of such
distributions.

Rights Upon Dissolution

   Unless the trust debentures are distributed to holders of the trust
securities, upon any voluntary or involuntary dissolution and liquidation of
the trust, after satisfaction of liabilities to creditors of the trust as
required by applicable law, the holders of the trust securities will be
entitled to receive, out of assets held by the trust, the liquidation
distribution in cash. See "Description of Preferred Securities --Liquidation of
the Trust and Distribution of Trust Debentures." Upon any voluntary or
involuntary liquidation or bankruptcy of the Company, the property trustee, as
holder of the trust debentures, would be a subordinated creditor of the
Company, subordinated in right of payment to all Senior Indebtedness as set
forth in the debenture indenture, but entitled to receive payment in full of
principal, and premium, if any, and interest, before any stockholders of the
Company receive payments or distributions. Since the Company will be the
guarantor under the guarantee and will agree to pay for all costs, expenses and
liabilities of the trust (other than the trust's obligations to the holders of
its trust securities), the positions of a holder of preferred securities and a
holder of trust debentures relative to other creditors and to stockholders of
the Company in the event of liquidation or bankruptcy of the Company are
expected to be substantially the same.

                                       43
<PAGE>

                DESCRIPTION OF COMMON STOCK AND PREFERRED STOCK


   The Company's authorized capital stock consists of:

  .  300,000,000 shares of Class A common stock, no par value;

  .  120,000,000 shares of Class B common stock, no par value; and

  .  70,000,000 shares of preferred stock, no par value.

   The summary description of the capital stock of the Company contained in
this prospectus is necessarily general and reference should be made to the
Company's Articles of Incorporation and Bylaws, which are exhibits to the
Registration Statement of which this prospectus is a part.

Common Stock

   As of February 1, 2000, an aggregate of approximately 97,883,500 shares of
Class A common stock were issued and outstanding and approximately 40,521,250
shares of Class B common stock were issued and outstanding. The shares of Class
B common stock are owned by Chevron Corporation and its affiliates.

   Voting. Generally, holders of Class B common stock vote together with
holders of Class A common stock as a single class on every matter acted upon by
the shareholders except the following matters:

  .  the holders of Class B common stock vote as a separate class for the
     election of three of the Company's directors, while the holders of Class
     A common stock vote as a separate class for the remaining directors;

  .  any amendment to the special corporate governance rights of Class B
     common stock, must be approved by a majority of the directors elected by
     holders of Class B common stock attending a meeting where such amendment
     is considered and a majority of all of the directors of the Company or
     by 66 2/3 percent of the outstanding shares of Class B common stock
     voting as a separate class, and the affirmative vote of a majority of
     the shares of Class A and Class B common stock, voting together as a
     single class; and

  .  any amendment to the provision of the Articles of Incorporation
     addressing the voting rights of holders of Class A and Class B common
     stock requires the approval of 66 2/3 percent of the outstanding shares
     of Class B common stock voting as a separate class, and the affirmative
     vote of a majority of the shares of Class A and Class B common stock,
     voting together as a single class.

   Holders of Class A and Class B common stock are entitled to one vote per
share on all matters to be voted upon by the shareholders generally. Holders of
Class A common stock may cumulate votes in connection with the election of
directors. The election of directors and all other matters will be by a
majority of votes represented and entitled to vote, except as otherwise
provided by law.

   Dividends; Liquidation. Subject to the preferences of the preferred stock,
holders of Class A and Class B common stock have equal ratable rights to
dividends out of funds legally available for that purpose, when and if
dividends are declared by the board of directors. Holders of Class A common
stock and Class B common stock are entitled to share ratably, as a single
class, in all of the assets of the Company available for distribution to
holders of shares of common stock upon the liquidation, dissolution or winding
up of the affairs of the Company, after payment of the Company's liabilities
and any amounts to holders of preferred stock.

   Conversion. A share of Class B common stock automatically converts into a
share of Class A common stock upon the transfer to any person other than
Chevron or an affiliate of Chevron. Additionally, any shares of Class A common
stock acquired by Chevron or one of its affiliates automatically convert into
Class B common stock. However, each share of Class B common stock will
automatically convert into a share of Class A common stock if the holders of
all Class B common stock cease to own collectively 15 percent of the
outstanding common stock of the Company.

                                       44
<PAGE>

   Additional Rights. Holders of Class A and Class B common stock generally are
not entitled to preemptive rights, subscription rights, or redemption rights,
except that, Chevron is entitled to preemptive rights under the shareholder
agreement described below. Any shares of Class A common stock acquired by
Chevron or its affiliates will automatically convert into shares of Class B
common stock, so long as Chevron and its affiliates continue to own 15 percent
or more of the outstanding voting power of the Company. The rights and
preferences of holders of Class A common stock are subject to the rights of any
series of preferred the Company may issue.

   Transfer Agent. The transfer agent and registrar for the common stock of the
Company is ChaseMellon Shareholder Services, L.L.C.

Preferred Stock

   By resolution of the board, the Company may, without any further vote by its
shareholders, authorize and issue an aggregate of 70,000,000 shares of
preferred stock. The preferred stock may be issued in one or more series. With
respect to each series, the board may determine the designation and the number
of shares, voting rights, preferences, limitations and special rights,
including any dividend rights, conversion rights, redemption rights and
liquidation preferences. Because of the rights that may be granted, the
issuance of preferred stock may delay or prevent a change of control.

   Series A Convertible Preferred Stock. The Company has established a series
of preferred stock which it has designated as Series A convertible preferred
stock. As of February 1, 2000, 6,697,776 shares of the Series A preferred stock
of the Company were issued and outstanding. All of the shares of Series A
preferred stock are owned by British Gas Atlantic Holdings BV and NOVA Gas
Services (U.S.) Inc.

   Priority. The Series A preferred stock ranks, with respect to dividend
rights and rights on liquidation, senior to all classes of the Company's common
stock and each other class of capital stock or preferred stock of the Company
unless the terms of any class of stock expressly provide that the class of
stock ranks on parity with the Series A preferred stock as to dividend rights
and rights on liquidation. The Company will not be permitted to issue any class
of stock ranking senior to the Series A preferred stock with respect to
dividend rights and rights upon liquidation without the consent of a majority
of the outstanding shares of Series A preferred stock.

   Liquidation. In the event of any voluntary or involuntary liquidation,
dissolution, or winding up of the Company, the holders of Series A preferred
stock are entitled to receive, prior to any distribution of any assets to
holders of any other class or series of stock, $50 per share plus an amount
equal to all accrued but unpaid dividends on each share. If the amount of
assets remaining for such distribution is insufficient to permit the payment in
full or the preferential amount to the holders of Series A preferred stock,
then the entire amount of remaining assets will be distributed ratably among
the holders of the Series A preferred stock.

   Dividends. Holders of the Series A preferred stock are entitled to receive
cash dividends at the rate of $3.00 per year per share. Dividends on the Series
A preferred stock will be cumulative from the date of issuance and will be
payable quarterly on the last day of March, June, September and December in
each year. The Company will pay its first dividend on the Series A preferred
stock on the first payment date after the Series A preferred stock is issued.
The holders of the Series A preferred stock will be entitled to cumulative cash
dividends when and if declared by the Company's board of directors and out of
funds legally available for that purpose.

   Redemption. The Company may redeem the shares of Series A preferred stock in
whole or in part at any time after the third anniversary of the issue date of
the shares. If less than all of the shares of Series A preferred stock are to
be redeemed, the shares will be redeemed pro rata from the holders of Series A
preferred stock.

   Conversion. Each share of Series A preferred stock is convertible by the
holder of such share at any time into a number of shares of Class A common
stock equal to the quotient of $50.00, plus accrued and unpaid

                                       45
<PAGE>

dividends, divided by the conversion price in effect on the date of conversion.
The initial conversion price is equal to $51.88. The conversion price will be
subject to adjustment for certain events such as dividends, subdivisions,
combinations, consolidation, merger or other similar events affecting the Class
A common stock.

   Voting. If the holders of Series A preferred stock are entitled to vote
separately as a class pursuant to applicable law, such holders will be entitled
to one vote for each share. In all other cases, the holders of Series A
preferred stock will be entitled to vote upon all matters upon which holders of
the Class A Common Stock have the right to vote, and will be entitled to the
number of votes equal to 1.22, times the number of whole shares of Class A
Common Stock into which such shares of Series A preferred stock could be
converted at the record date for such vote, such votes to be counted together
with all other stock as a single class. Whenever accrued but unpaid dividends
exceed $2.25 per share of Series A preferred stock, the holders of the Series A
preferred stock will have the option, voting separately as a class together
with holders of preferred stock with comparable rights, to elect two directors
to the Company's board of directors at the next annual meeting of shareholders
and at each subsequent meeting. The right of the holders of Series A preferred
stock to elect directors to the Company's board of directors, and the term of
those directors so elected, will continue until there are no longer any accrued
but unpaid dividends on the Series A preferred stock.

Shareholder Agreement

   The Company, Dynegy Holdings and Illinova have entered into a shareholder
agreement governing certain aspects of the relationship of Chevron and the
Company. The shareholder agreement contains rights relating to and limitations
on acquisitions of common stock by Chevron. Chevron is entitled to preemptive
rights to acquire shares of common stock in proportion to its existing
ownership of the Company's stock, whenever the Company issues shares of stock
or securities convertible into stock. In addition, Chevron may freely acquire
up to 40% of the outstanding voting securities of the Company. However, should
any acquisition by Chevron require Chevron to register under the Public Utility
Holding Company Act, the Company has no obligation to take any action to avoid
that registration. If the Company subsequently redeems or repurchases any
shares, Chevron is not required to reduce its ownership interest, even if
Chevron's resulting ownership interest is in excess of 40%. Any shares of Class
A common stock acquired by Chevron will automatically convert into Class B
common stock.

   If Chevron acquires more than 40% of the voting securities, it must make an
offer to acquire all of the outstanding stock of the Company. Until February 1,
2001, Chevron may not make any such offer (or a related acquisition) unless a
third person seeks to acquire a 15% voting interest in the Company. Thereafter,
Chevron may make such an offer at any time. Any offer by Chevron for all of the
outstanding stock is subject to an auction process. The shareholder agreement
contains detailed provisions governing the auction but, in general, Chevron at
its election may either (1) participate in the auction without any special
priority or other rights vis-a-vis other bidders, or (2) not participate in the
auction and instead have the right to purchase all of the outstanding stock of
the Company at 105% of the bid selected by the Company's board of directors. If
Chevron agrees to purchase the Company at 105% of the selected bid, the
purchase agreement will contain customary termination provisions including a 5%
termination fee. If Chevron is not the successful bidder under either process,
it is obligated to vote in favor of the bid or tender its Company shares, as
the case may be. However, if Chevron is the successful bidder, but the Company
subsequently terminates the agreement (and pays Chevron the 5% termination
fee), Chevron is free to tender for any and all stock of the Company and to
pursue any rights and remedies available to it, and Chevron would not be
required to support any alternative transaction which the Company might then
wish to pursue. Except in conjunction with a permitted offer, Chevron may not
become a participant in the solicitation of proxies concerning any acquisition
of voting securities of the Company.

   The shareholder agreement generally prohibits Chevron from selling or
transferring any shares of Class B common stock until February 1, 2001, except
a transfer to an affiliate of Chevron or if Chevron is required to sell or
transfer any shares by any governmental regulatory authority. After this
restriction lapses, Chevron may sell or transfer shares of Class B common stock
in the following transactions:

  .  in a widely-dispersed public offering, or

                                       46
<PAGE>

  .  a sale to an unaffiliated third party, provided that the Company is
     given the opportunity to purchase, or to find a different buyer to
     purchase, the shares proposed to be sold by Chevron.

   Upon the sale or transfer to any person other than an affiliate of Chevron,
the shares of Class B common stock are automatically converted into shares of
Class A common stock.

   The shareholder agreement provides that the Company may require Chevron and
its affiliates to sell all of the shares of Class B common stock under certain
circumstances. These rights are triggered if Chevron or its board designees
block--which they are entitled to do under the Company's bylaws--any of the
following transactions two times in any 24 month period or three times over any
period of time:

  .  the issuance of new shares of stock where the aggregate consideration to
     be received exceeds the greater of $1 billion or one-quarter of the
     Company's total market capitalization;

  .  any disposition of substantially all of the gas marketing or liquids
     lines of business as conducted by Dynegy Holdings prior to the closing
     of the business combination between Dynegy Holdings and Illinova;

  .  any merger, consolidation, joint venture, liquidation, dissolution,
     bankruptcy, acquisition of stock or assets, or issuance of common or
     preferred stock, any of which would result in payment or receipt of
     consideration having a fair market value exceeding the greater of $1
     billion or one-quarter of the Company's total market capitalization; or

  .  any other transaction or series of related transactions having a fair
     market value exceeding the greater of $1 billion or one-quarter of the
     Company's total market capitalization.

   However, upon the occurrence of one of these triggering events and in lieu
of selling the Class B common stock, Chevron may elect to retain the shares of
Class B common stock but forfeit its right and the right of its board designees
to block the transactions listed above.

   A block consists of a vote against a proposed transaction by either (a) all
of Chevron's representatives on the board of directors present at the meeting
where the vote is taken (if the transaction would otherwise be approved by the
board of directors) or (b) any of the Class B common stock held by Chevron and
its affiliates if the transaction otherwise would be approved by at least two-
thirds of all other shares entitled to vote on the transaction, excluding
shares held by management, directors or subsidiaries of the Company.

   In general, if the Company exercises its rights to cause Chevron to sell its
shares, the process Chevron must follow to sell the shares--and the Company's
rights to purchase the shares--are similar to those applicable to other sales
by Chevron.

   The shareholder agreement also prohibits the Company from taking the
following actions:

  .  issuing any shares of Class B common stock to any person other than
     Chevron and its affiliates;

  .  amending any provisions in the articles of incorporation or bylaws
     which, in each case, contain or implement the special rights of holders
     of Class B common stock, without the consent of the holders of the
     shares of Class B common stock or the three directors elected by such
     holders;

  .  adopting a shareholder rights plan, "poison pill" or similar device that
     prevents Chevron from exercising its rights to acquire shares of common
     stock or from disposing of its shares when required by the Company; and

  .  acquiring, owning or operating a nuclear power facility, other than
     being a passive investor in a publicly-traded company that owns a
     nuclear facility.

   The provisions of the shareholder agreement terminate as follows:

  .  The limitations on acquisitions and transfers by Chevron, the buyout
     rights, the restrictions on certain actions of the Company and Chevron's
     preemptive rights all terminate on the date Chevron and its

                                       47
<PAGE>

     affiliates cease to own shares representing at least 15% of the
     outstanding voting power of the Company. At such time all of the shares
     of Class B common stock held by Chevron would convert to shares of Class
     A common stock, and

  .  The remaining provisions (primarily relating to the Public Utility
     Holding Company Act) terminate on the date Chevron and its affiliates
     cease to own shares representing at least 10% of the outstanding voting
     power of the Company.

Registration Rights

   The Company has granted Chevron registration rights for the Class A common
stock underlying the Class B common held by Chevron. Beginning October 28,
2000, Chevron has the right on eight occasions to require the Company to
initiate a public offering for all the shares requested to be sold by Chevron.
Chevron may exercise its rights to request a registration once during any 180
day period. Additionally, Chevron has the right to participate in and sell
shares of stock held by it during any public offering of the Company's stock
whether offered by the Company or any other shareholder. In the Chevron
registration rights agreement, Chevron has made certain agreements with British
Gas Atlantic Holdings BV and NOVA Gas Services (U.S.) Inc. by which British Gas
Atlantic and NOVA will have preferential rights with respect to registrations
in which Chevron may participate for two years following February 1, 2000.
Until February 1, 2003, the Company may not grant registration rights to other
shareholders superior to those granted to Chevron without also offering such
superior registration rights to Chevron.

   The Company has granted British Gas Atlantic and NOVA registration rights
for shares of Series A preferred stock and shares of Class A common stock
issued or issuable upon conversion of the Series A preferred stock held by each
of them. Beginning October 28, 2000, British Gas Atlantic and NOVA have the
right on four occasions to require the Company to initiate a registered public
offering for all the shares requested to be sold by each of British Gas
Atlantic or NOVA. British Gas Atlantic and NOVA may collectively exercise their
rights to request a registration once during each 180 day period. Additionally,
British Gas Atlantic and NOVA have the right, collectively, to participate in
and sell shares of stock held by them during any public offering of the
Company's stock whether offered by the Company or any other shareholder. Until
February 1, 2003, the Company is prohibited from granting to other shareholders
registration rights superior to those granted to British Gas Atlantic and NOVA
without also offering such superior registration rights to British Gas Atlantic
and NOVA.

                        DESCRIPTION OF DEPOSITARY SHARES

Depositary Shares

   General. The Company may, at its option, elect to offer fractional shares of
preferred stock, rather than full shares of preferred stock. In such event, the
Company will issue to the public receipts for depositary shares, each of which
will represent a fraction (to be set forth in the applicable prospectus
supplement of a share of a particular series of preferred stock as described
below.

   The shares of any series of preferred stock represented by depositary shares
will be deposited under a Deposit Agreement (the "Deposit Agreement") between
the Company and a bank or trust company selected by the Company having its
principal office in the United States and having a combined capital and surplus
of at least $50,000,000 (the "Depositary"). Subject to the terms of the Deposit
Agreement, each owner of a depositary share will be entitled, in proportion to
the applicable fraction of a share of preferred stock represented by such
depositary share, to all the rights and preferences of the preferred stock
represented thereby (including dividend, voting, redemption an liquidation
rights).

   The depositary shares will be evidenced by depositary receipts issued
pursuant to the Deposit Agreement Depositary receipts will be distributed to
those persons purchasing the fractional shares of preferred stock in

                                       48
<PAGE>

accordance with the terms of the offering. Copies of the forms of Deposit
Agreement and depositary receipt are filed as exhibits to the Registration
Statement of which this prospectus is a part, and the following summary is
qualified in its entirety by reference to such exhibits.

   If required by law or applicable securities exchange rules, engraved
depositary receipts will be prepared. Pending the preparation of definitive
engraved depositary receipts, the Depositary may, upon the written order of the
Company, issue temporary depositary receipts substantially identical to (and
entitling the holders thereof to all the rights pertaining to) the definitive
depositary receipts but not in definitive form. Definitive depositary receipts
will be prepared thereafter without unreasonable delay, and temporary
depositary receipts will be exchangeable for definitive depositary receipts at
the Company's expense.

   Dividends and Other Distributions. The Depositary will distribute all cash
dividends or other cash distributions received in respect of the preferred
stock to the record holders of depositary shares relating to such preferred
stock in proportion to the number of such depositary shares owned by such
holders.

   In the event of a distribution other than in cash, the Depositary will
distribute property received by it to the record holders of depositary shares
entitled thereto, unless the Depositary determines that it is not feasible to
make such distribution, in which case the Depositary may, with the approval of
the Company, sell such property and distribute the net proceeds from such sale
to such holders.

   Redemption of Depositary Shares. If a series of preferred stock represented
by depositary shares is subject to redemption, the depositary shares will be
redeemed from the proceeds received by the Depositary resulting from the
redemption, in whole or in part, of such series of preferred stock held by the
Depositary. The redemption price per depositary share will be equal to the
applicable fraction of their redemption price per share payable with respect to
such series of the preferred stock. Wherever the Company redeems shares of
preferred stock held by the Depositary, the Depositary will redeem as of the
same redemption date the number of depositary shares representing the shares of
preferred stock so redeemed. If fewer than all the depositary shares are to be
redeemed, the depositary shares to be redeemed will be selected by lot or pro
rata as may be determined by the Depositary.

   Voting the Preferred Stock. Upon receipt of notice of any meeting at which
the holders of the preferred stock are entitled to vote, the Depositary will
mail the information contained in such notice of meeting to the record holders
of the depositary shares relating to such preferred stock. Each record holder
of such depositary shares on the record date (which will be the same date as
the record date for the preferred stock) will be entitled to instruct the
Depositary as to the exercise of the voting rights pertaining to the amount of
the preferred stock represented by such holder's depositary shares. The
Depositary will endeavor, insofar as practicable, to vote the amount of the
preferred stock represented by such depositary shares in accordance with such
instructions, and the Company will agree to take all action that may be deemed
necessary by the Depositary in order to enable the Depositary to do so. The
Depositary will abstain from voting shares of the preferred stock to the extent
it does not receive specific instructions from the holders of depositary shares
representing such preferred stock.

   Amendment and Termination of the Depositary Agreement. The form of
depositary receipt evidencing the depositary shares and any provision of the
Deposit Agreement may at any time be amended by agreement between the Company
and the Depositary. However, any amendment that materially and adversely alters
the rights of the holders of depositary shares will not be effective unless
such amendment has been approved by the holders of at least a majority of the
depositary shares then outstanding. The Deposit Agreement may be terminated by
the Company or the Depositary only if (i) all outstanding depositary shares
have been redeemed or (ii) there has been a final distribution in respect of
the preferred stock in connection with any liquidation, dissolution or winding
up of the Company and such distribution has been distributed to the holders of
depositary receipts.

   Charges of Depositary. The Company will pay all transfer and other taxes and
governmental charges arising solely from the existence of the depositary
arrangements. The Company will pay charges of the

                                       49
<PAGE>

Depositary in connection with the initial deposit of the preferred stock and
any redemption of the preferred stock. Holders of depositary receipts will pay
other transfer and other taxes and governmental charges and such other charges,
including a fee for the withdrawal of shares of preferred stock upon surrender
of depositary receipts, as are expressly provided in the Deposit Agreement to
be for their accounts.

   Withdrawal of Preferred Stock. Upon surrender of depositary receipts at the
principal office of the Depositary, subject to the terms of the Deposit
Agreement, the owner of the depositary shares evidenced thereby is entitled to
delivery of the number of whole shares of preferred stock and all money and
other property, if any, represented by such depositary shares. Partial shares
of preferred stock will not be issued. If the depositary receipts delivered by
the holder evidence a number of depositary shares in excess of the number of
depositary shares representing the number of whole shares of preferred stock to
be withdrawn, the Depositary will deliver to such holder at the same time a new
depositary receipt evidencing such excess number of depositary shares. Holders
of preferred stock thus withdrawn will not thereafter be entitled to deposit
such shares under the Deposit Agreement or to receive depositary receipts
evidencing depositary shares therefor.

   Miscellaneous. The Depositary will forward to holders of depository receipts
all reports and communications from the Company that are delivered to the
Depositary and that the Company is required to furnish to the holders of the
preferred stock.

   Neither the Depositary nor the Company will be liable if it is prevented or
delayed by law or any circumstance beyond its control in performing its
obligations under the Deposit Agreement. The obligations of the Company and the
Depositary under the Deposit Agreement will be limited to performance in good
faith of their duties thereunder and they will not be obligated to prosecute or
defend any legal proceeding in respect of any depositary shares or preferred
stock unless satisfactory indemnity is furnished. They may rely upon written
advice of counsel or accountants, or upon information provided by persons
presenting preferred stock for deposit, holders of depositary receipts or other
persons believed to be competent and on documents believed to be genuine.

   Resignation and Removal of Depositary. The Depositary may resign at any time
by delivering to the Company notice of its election to do so, and the Company
may at any time remove the Depositary, any such resignation or removal to take
effect upon the appointment of a successor Depositary and its acceptance of
such appointment. Such successor Depositary must be appointed within 60 days
after delivery of the notice of resignation or removal and must be a bank or
trust company having its principal office in the United States and having a
combined capital and surplus of at least $50,000,000.

                       DESCRIPTION OF SECURITIES WARRANTS

   The Company may issue securities warrants for the purchase of debt
securities, preferred stock or depositary shares. Securities warrants may be
issued independently or together with debt securities, preferred stock, or
depositary shares offered by any prospectus supplement and may be attached to
or separate from any such offered securities. Each series of securities
warrants will be issued under a separate warrant agreement to be entered into
between the Company and a bank or trust company, as warrant agent, all as set
forth in the prospectus supplement relating to the particular issue of
securities warrants. The securities warrant agent will act solely as an agent
of the Company in connection with the securities warrants and will not assume
any obligation or relationship of agency or trust for or with any holders of
securities warrants or beneficial owners of securities warrants. The following
summary of certain provisions of the securities warrants does not purport to be
complete and is subject to, and is qualified in its entirety by reference to,
all provisions of the securities warrant agreements.

                                       50
<PAGE>

   Reference is made to the prospectus supplement relating to the particular
issue of securities warrants offered thereby for the terms of and information
relating to such securities warrants, including, where applicable:

  . the designation, aggregate principal amount, currencies, denominations,
    and terms of the series of debt securities purchasable upon exercise of
    debt warrants and the price at which such debt securities may be
    purchased upon such exercise;

  . the number of shares and series of preferred stock and/or depositary
    shares purchasable upon the exercise of preferred stock warrants and the
    price at which such number of shares of such series of preferred stock
    and/or depositary shares may be purchased upon such exercise;

  . the date on which the right to exercise such securities warrants shall
    commence and the date on which such right shall expire (the "Expiration
    Date");

  . United States federal income tax consequences applicable to such
    securities warrants;

  . the amount of securities warrants outstanding as of the most recent
    practicable date; and

  . any other terms of such securities warrants.

   Securities warrants will be issued in registered form only. The exercise
price for securities warrants will be subject to adjustment in accordance with
the applicable prospectus supplement.

   Each securities warrant will entitle the holder thereof to purchase such
principal amount of debt securities or such number of shares of preferred stock
or depositary shares at such exercise price as shall in each case be set forth
in, or calculable from, the prospectus supplement relating to the securities
warrants. This exercise price may be subject to adjustment upon the occurrence
of certain events as set forth in such prospectus supplement. After the close
of business on the Expiration Date (or such later date to which such Expiration
Date may be extended by the Company), unexercised securities warrants will
become void. The place or places where, and the manner in which, securities
warrants may be exercised shall be specified in the prospectus supplement
relating to such securities warrants.

   Prior to the exercise of any securities warrants to purchase debt
securities, preferred stock or depositary shares, holders of such securities
warrants will not have any of the rights of holders of debt securities,
preferred stock or depositary shares, as the case may be, purchasable upon such
exercise, including the right to receive payments of principal of, premium, if
any, or interest, if any, on the debt securities purchasable upon such exercise
or to enforce covenants in the applicable Indenture, or to receive payments of
dividends, if any, on the preferred stock or depositary shares purchasable upon
such exercise, or to exercise any applicable right to vote.

                              SELLING SHAREHOLDERS

   The following table sets forth information relating to the selling
shareholders' beneficial ownership of shares of the Company's Class A common
stock:

<TABLE>
<CAPTION>
                                                           Shares of Class A
   Selling Shareholder                                   Common Stock Owned (a)
   -------------------                                   ----------------------
   <S>                                                   <C>
   British Gas Atlantic Holdings BV.....................       3,227,532
     100 Thames Valley Park Drive
     Reading, Berkshire RG6 1PT
   NOVA Gas Services (U.S.) Inc.........................       3,227,532
     1550 Coraopolis Heights Road
     Moon Township, Pennsylvania 15108
</TABLE>
- --------
(a) Represents shares of Class A common stock issuable upon conversion of the
    Series A preferred stock held by the selling shareholder.

                                       51
<PAGE>

   The prospectus supplement relating to any shares of Class A common stock
offered by the selling shareholders will set forth the number of shares of
Class A common stock being offered for each selling shareholder's account as
well as the number of such shares and the percentage of the class, if greater
than one percent, to be owned by each selling shareholder after completion of
the offering.

   All expenses incurred with the registration of the shares of Class A common
stock owned by the selling shareholders will be borne by the Company; provided
that, the Company will not be obligated to pay any underwriting fees, discounts
or commissions in connection with such registration.

                              PLAN OF DISTRIBUTION

   Any of the securities being offered hereby may be sold in any one or more of
the following ways from time to time:

  . through agents;

  . to or through underwriters;

  . through dealers; and

  . directly by the Company; or

  . in the case of preferred securities, by the trust to purchasers.

   The distribution of the securities may be effected from time to time in one
or more transactions at a fixed price or prices, which may be changed, at
market prices prevailing at the time of sale, at prices related to such
prevailing market prices or at negotiated prices.

   Offers to purchase securities may be solicited by agents designated by the
Company from time to time. Any such agent involved in the offer or sale of the
securities in respect of which this prospectus is delivered will be named, and
any commissions payable by the Company or the trust to such agent will be set
forth, in the applicable prospectus supplement. Unless otherwise indicated in
such prospectus supplement, any such agent will be acting on a reasonable best
efforts basis for the period of its appointment. Any such agent may be deemed
to be an underwriter, as that term is defined in the Securities Act of 1933, of
the securities so offered and sold.

   If securities are sold by means of an underwritten offering, the Company
and, in the case of an offering of preferred securities, the trust will execute
an underwriting agreement with an underwriter or underwriters at the time an
agreement for such sale is reached, and the names of the specific managing
underwriter or underwriters, as well as any other underwriters, the respective
amounts underwritten and the terms of the transaction, including commissions,
discounts and any other compensation of the underwriters and dealers, if any,
will be set forth in the applicable prospectus supplement which will be used by
the underwriters to make resales of the securities in respect of which this
prospectus is being delivered to the public. If underwriters are utilized in
the sale of any securities in respect of which this prospectus is being
delivered, such securities will be acquired by the underwriters for their own
account and may be resold from time to time in one or more transactions,
including negotiated transactions, at fixed public offering prices or at
varying prices determined by the underwriters at the time of sale. Securities
may be offered to the public either through underwriting syndicates represented
by managing underwriters or directly by one or more underwriters. If any
underwriter or underwriters are utilized in the sale of securities, unless
otherwise indicated in the applicable prospectus supplement, the underwriting
agreement will provide that the obligations of the underwriters are subject to
certain conditions precedent and that the underwriters with respect to a sale
of such securities will be obligated to purchase all such securities if any are
purchased.

   The Company or the trust, as applicable, may grant to the underwriters
options to purchase additional securities, to cover over-allotments, if any, at
the initial public offering price (with additional underwriting commissions or
discounts), as may be set forth in the prospectus supplement relating thereto.
If the Company

                                       52
<PAGE>

or the trust, as applicable, grants any over-allotment option, the terms of
such over-allotment option will be set forth in the prospectus supplement for
such securities.

   If a dealer is utilized in the sale of the securities in respect of which
this prospectus is delivered, the Company or the trust, as applicable, will
sell such securities to the dealer as principal. The dealer may then resell
such securities to the public at varying prices to be determined by such dealer
at the time of resale. Any such dealer may be deemed to be an underwriter, as
such term is defined in the Securities Act, of the securities so offered and
sold. The name of the dealer and their terms of the transaction will be set
forth in the prospectus supplement relating thereto.

   Offers to purchase securities may be solicited directly by the Company or
the trust, as applicable, and the sale thereof may be made by the Company or
the trust directly to institutional investors or others, who may be deemed to
be underwriters within the meaning of the Securities Act of 1933 with respect
to any resale thereof. The terms of any such sales will be described in the
prospectus supplement relating thereto.

   Securities may also be offered and sold, if so indicated in the applicable
prospectus supplement, in connection with a remarketing upon their purchase, in
accordance with a redemption or repayment pursuant to their terms, or
otherwise, by one or more firms ("remarketing firms"), acting as principals for
their own accounts or as agents for the Company or the trust, as applicable.
Any remarketing firm will be identified and the terms of its agreement, if any,
with the Company or the trust and its compensation will be described in the
applicable prospectus supplement. Remarketing firms may be deemed to be
underwriters, as that term is defined in the Securities Act of 1933, in
connection with the securities remarketed thereby.

   If so indicated in the applicable prospectus supplement, the Company or the
trust, as applicable, may authorize agents and underwriters to solicit offers
by certain institutions to purchase securities from the Company or the trust at
the public offering price set forth in the applicable prospectus supplement
pursuant to delayed delivery contracts providing for payment and delivery on
the date or dates stated in the applicable prospectus supplement. Such delayed
delivery contracts will be subject to only those conditions set forth in the
applicable prospectus supplement. A commission indicated in the applicable
prospectus supplement will be paid to underwriters and agents soliciting
purchases of securities pursuant to delayed delivery contracts accepted by the
Company or the trust, as applicable.

   Agents, underwriters, dealers and remarketing firms may be entitled under
relevant agreements with the Company or the trust, as applicable, to
indemnification by the Company or the trust against certain liabilities,
including liabilities under the Securities Act, or to contribution with respect
to payments which such agents, underwriters, dealers and remarketing firms may
be required to make in respect thereof.

   Each series of securities will be a new issue and, other than the common
stock, which is listed on The New York Stock Exchange, will have no established
trading market. The Company may elect to list any series of securities on an
exchange, and in the case of common stock, on any additional exchange, but,
unless otherwise specified in the applicable prospectus supplement, the Company
shall not be obligated to do so. No assurance can be given as to the liquidity
of the trading market for any of the securities.

   Agents, underwriters, dealers and remarketing firms may be customers of,
engage in transactions with, or perform services for, the Company and its
subsidiaries in the ordinary course of business.

                             VALIDITY OF SECURITIES

   The validity of the securities (other than the preferred securities of the
trust) will be passed upon for the Company by Vinson & Elkins L.L.P., Houston,
Texas, and will be passed upon for any agents, dealers or underwriters by
counsel named in the applicable prospectus supplement. The validity of the
preferred securities of the trust will be passed upon for the Company and the
trust by Richards, Layton & Finger, P.A., special Delaware counsel to the
Company and the trust.

                                       53
<PAGE>

                                    EXPERTS

   The audited consolidated financial statements and schedule of Dynegy
Holdings Inc. (formerly Dynegy Inc.) and subsidiaries, incorporated by
reference in this Registration Statement, have been audited by Arthur Andersen
LLP, independent public accountants, as indicated in their report with respect
thereto, and are incorporated herein in reliance upon the authority of said
firm as experts in accounting and auditing in giving said report.

   The consolidated financial statements of Illinova incorporated in this
document by reference to Illinova's Annual Report on Form 10-K/A for the year
ended December 31, 1998, have been so incorporated in reliance on the report
(which contains explanatory paragraphs that describe Illinova's commitment to
exit nuclear operations and the resulting impairment of the Clinton Power
Station in accordance with Statement of Financial Accounting Standards No. 121,
"Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets
to be Disposed Of," discussed in Note 2 to the consolidated financial
statements, Illinova's quasi-reorganization effective December 1998, discussed
in Note 2 to the consolidated financial statements, Illinova's adoption of
Statement of Financial Accounting Standards No. 133, "Accounting for
Derivatives and Hedging Activities" and Emerging Issues Task Force Statement
98-10, "Accounting for Energy Trading and Risk Management Activities,"
discussed in Note 2 to the consolidated financial statements, and Illinova's
discontinued use of Statement of Financial Accounting Standards No. 71,
"Accounting for the Effects of Certain Types of Regulation," for its generation
segment of the business, discussed in Note 1 to the consolidated financial
statements) of PricewaterhouseCoopers LLP, independent accountants, given on
the authority of said firm as experts in auditing and accounting.

                                       54
<PAGE>


                        [Dynegy Inc. Logo Appears Here]

                                8,500,000 Shares

                              Class A Common Stock

                                  -----------

                             PROSPECTUS SUPPLEMENT
                                 April 17, 2000

                                  -----------

                                Lehman Brothers
                              Goldman, Sachs & Co.
                              ABN AMRO Rothschild
                      a division of ABN AMRO Incorporated
                         Banc of America Securities LLC
                               CIBC World Markets
                           Credit Suisse First Boston
                              Merrill Lynch & Co.
                            PaineWebber Incorporated


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