SDL INC
S-3, 1999-08-11
SEMICONDUCTORS & RELATED DEVICES
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<PAGE>   1
As filed with the Securities and Exchange Commission on August 11, 1999
                                                      Registration No. 333-____.
================================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

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

                                    SDL, INC.
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                    <C>                                 <C>
              Delaware                               3674                           77-0331449
    (State or other jurisdiction          (Primary Standard Industrial           (I.R.S. employer
  of incorporation or organization)        Classification Code Number)        identification number)
</TABLE>



                               80 Rose Orchard Way
                           San Jose, California 95134
                                 (408) 943-9411
               (Address, including ZIP code, and telephone number,
        including area code, of registrant's principal executive offices)

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

                                Michael L. Foster
                             Chief Financial Officer
                                    SDL, Inc.
                               80 Rose Orchard Way
                           San Jose, California 95134
                                 (408) 943-9411
            (Name, address, including ZIP code, and telephone number,
                   including area code, of agent for service)

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

                                   Copies To:

                            William D. Sherman, Esq.
                            Stephen J. Schrader, Esq.
                             MORRISON & FOERSTER LLP
                               755 Page Mill Road
                           Palo Alto, California 94304
                                 (650) 813-5600

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

        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
    From time to time after the effective date of this Registration Statement
                      as determined by market conditions.

    If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

    If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement of the same offering. [ ] __________

    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ] ____________

    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

<PAGE>   2

<TABLE>
<CAPTION>
                                           CALCULATION OF REGISTRATION FEE

==================================================================================================================

                                                  PROPOSED MAXIMUM      PROPOSED MAXIMUM
 TITLE OF SECURITIES TO BE      AMOUNT TO BE      AGGREGATE OFFERING   AGGREGATE OFFERING          AMOUNT OF
       REGISTERED(1)            REGISTERED(2)    PRICE PER UNIT(2)(3)     PRICE(2)(3)          REGISTRATION FEE
==================================================================================================================
<S>                           <C>                <C>                   <C>                     <C>
Common Stock(4),
$0.001 par value per
share.......

Preferred Stock(5), $0.001
par value per share.......      $300,000,000        (2) (3)                 $300,000,000            $83,400

Depositary Shares(6)......

Warrants(7)...............

Debt Securities(8)........
- ------------------------------------------------------------------------------------------------------------------
Total.....................    $300,000,000          (2) (3)                 $300,000,000            $83,400(9)
==================================================================================================================
</TABLE>

(1) Subject to footnote (2), this Registration Statement also covers contracts
    which may be issued by the Registrant under which the counterparty may be
    required to purchase Common Stock, Preferred Stock, Depositary Shares or
    Debt Securities.

(2) In no event will the aggregate maximum offering price of all securities
    registered pursuant to this Registration Statement exceed $300,000,000. Any
    securities registered hereunder may be sold separately or as units with
    other securities registered hereunder.

(3) The proposed maximum offering price per unit (a) has been omitted pursuant
    to Instruction II.D. of Form S-3 and (b) will be determined, from time to
    time, by the Registrant in connection with the issuance by the Registrant of
    the securities registered hereunder.

(4) Subject to footnote 2, there is being registered hereunder an indeterminate
    number of shares of Common Stock as may be sold from time to time by
    Registrant. Subject to footnote (2), there is also being registered
    hereunder an indeterminate number of shares of Common Stock that may be
    issued upon conversion of Preferred Stock, Depositary Shares or Debt
    Securities registered hereunder or upon exercise of Warrants registered
    hereunder, as the case may be.

(5) Subject to footnote 2, there is being registered hereunder an indeterminate
    number of shares of Preferred Stock as may be sold from time to time by
    Registrant or may be issued upon conversion of Debt Securities or exercise
    of Warrants registered hereunder.

(6) To be represented by Depositary Receipts representing an interest in all or
    a specified portion of a share of Preferred Stock.

(7) Subject to footnote 2, there is being registered hereunder an indeterminate
    number of Warrants representing rights to purchase Preferred Stock or Common
    Stock registered hereunder.

(8) Subject to footnote 2, there is being registered hereunder an indeterminate
    number of Debt Securities as may be sold from time to time.

(9) Calculated pursuant to Rule 457(o) of the rules and regulations under the
    Securities Act of 1933, as amended.

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

    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE AN AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT
SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE
SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.



<PAGE>   3
THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE MAY
NOT SELL THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO SELL THESE SECURITIES AND IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES
IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.



                              SUBJECT TO COMPLETION
                  PRELIMINARY PROSPECTUS DATED AUGUST 11, 1999

                                  $300,000,000

                                    SDL, INC.

                COMMON STOCK, PREFERRED STOCK, DEPOSITARY SHARES,
                          WARRANTS AND DEBT SECURITIES

               SDL, Inc. may offer, from time to time, in one or more series or
classes and in amounts, at prices and on terms that it will determine at the
time of offering, with an aggregate public offering price of up to $300,000,000
(or its equivalent in another currency based on the exchange rate at the time of
sale):

               -      shares of common stock, $0.001 par value per share;

               -      shares of preferred stock, $0.001 par value per share;

               -      shares of preferred stock represented by depositary
                      shares;

               -      warrants to purchase common stock or preferred stock; and

               -      debt securities.

               We will provide the specific terms of these securities in
supplements to this prospectus. You should read this prospectus and the
applicable supplement carefully before you invest.

               Our common stock is listed on the NASDAQ National Market System
under the symbol "SDLI." On August 9, 1999, the last reported sales price of our
common stock on the NASDAQ National Market System was $63.375 per share.

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

        INVESTING IN THE SECURITIES INVOLVES RISKS WHICH ARE DESCRIBED IN THE
"RISK FACTORS" SECTION BEGINNING ON PAGE ___ OF THIS PROSPECTUS.

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

                           Neither The Securities And

    Exchange Commission Nor Any State Securities Commission Has Approved Or
 Disapproved Of These Securities Or Determined That This Prospectus Is Truthful
     Or Complete. Any Representation To The Contrary Is A Criminal Offense.

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

                The date of this prospectus is August ___, 1999.



<PAGE>   4
                                TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
About This Prospectus......................................................   3

Where You Can Find More Information........................................   3

Incorporation Of Certain Documents By Reference............................   3

The Company................................................................   4

Use Of Proceeds............................................................   4

Ratios Of Earnings to Fixed Charges........................................   4

Forward Looking Statements.................................................   5

Risk Factors...............................................................   5

Description Of Common Stock................................................  14

Description Of Preferred Stock.............................................  15

Description Of Depositary Shares...........................................  16

Description Of Warrants....................................................  19

Description Of Debt Securities.............................................  20

Delaware Law and Certain Charter Provisions................................  29

Plan of Distribution.......................................................  30

Legal Matters..............................................................  31

Experts....................................................................  31
</TABLE>

<PAGE>   5
                              ABOUT THIS PROSPECTUS

       This prospectus is part of a registration statement that we filed with
the Securities and Exchange Commission using a "shelf" registration process.
Under this shelf process, we may sell any combination of the common stock,
preferred stock, depositary shares, warrants and debt securities described in
this prospectus in one or more offerings up to a total dollar amount of
$300,000,000. This prospectus provides you with a general description of the
securities we may offer. Each time we sell securities, 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 the applicable prospectus supplement together with additional information
described under the heading "Where You Can Find More Information."

       Unless otherwise indicated or unless the context requires otherwise, all
references in this prospectus to "SDL", "we," "us," "our" or the "Company" mean
SDL, Inc. and its subsidiaries. When we refer to our "Charter" we mean the
Company's Restated Certificate of Incorporation, as amended, and as supplemented
by the Certificate of Designation for the Series B Preferred Stock.

                       WHERE YOU CAN FIND MORE INFORMATION

       The Company files annual, quarterly and special reports, proxy statements
and other information with the Securities and Exchange Commission (the "SEC").
You may read and copy any document we file with the SEC at the SEC's public
reference rooms at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W.,
Washington, D.C. 20549, and at the SEC's regional offices at Seven World Trade
Center, 13th Floor, New York, New York 10048, and Citicorp Center, 500 West
Madison Street, Suite 1400, Chicago, Illinois 60661-2511. Please call the SEC at
1-800-SEC-0330 for further information on the public reference rooms. The SEC
also maintains a web site that contains reports, proxy and information
statements, and other information regarding registrants that file electronically
with the SEC (http://www.sec.gov). You can inspect reports and other information
we file at the offices of the National Association of Securities Dealers, Inc.,
1735 K. Street, N.W., Washington, D.C. 20006.

       We have filed a registration statement of which this prospectus is a part
and related exhibits with the SEC under the Securities Act of 1933, as amended
(the "Securities Act"). The registration statement contains additional
information about us and the securities. You may inspect the registration
statement and exhibits without charge at the office of the SEC at 450 Fifth
Street, N.W., Washington, D.C. 20549, and you may obtain copies from the SEC at
prescribed rates.


                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

        The SEC allows us to "incorporate by reference" the information we file
with the SEC, which means that we can disclose important information to you by
referring to those documents. The information incorporated by reference is an
important part of this prospectus. Any statement contained in a document which
is incorporated by reference in this prospectus is automatically updated and
superseded if information contained in this prospectus, or information that we
later file with the SEC, modifies or replaces this information. We incorporate
by reference the following documents we filed with the SEC:

- -       SDL's Annual Reports on Form 10-K and Form 10-K/A for the year ended
        December 31, 1998;

- -       SDL's Quarterly Reports on Form 10-Q for the quarters ended March 31,
        1999 and June 30, 1999;

- -       SDL's Definitive Proxy Statement dated April 9, 1999, filed in
        connection with SDL's 1999 Annual Meeting of Stockholders held on May
        13, 1999;

- -       SDL's current reports on Form 8-K each dated as of May 18, 1999 filed
        with the SEC on June 2, 1999 and June 29, 1999, respectively;



                                       3
<PAGE>   6
- -       the description of SDL's common stock contained in SDL's Registration
        Statement on Form 8-A filed on March 31, 1995 under Section 12 of the
        Securities Exchange Act of 1934, as amended (the "Exchange Act");

- -       the description of SDL's preferred stock rights contained in SDL's
        Registration Statement on Form 8-A filed on November 7, 1997 under
        Section 12 of the Exchange Act, including SDL's Registration Statement
        on Form 8-A/A filed on March 19, 1999 updating such description;

- -       all documents filed by the Company with the SEC pursuant to Section
        13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of the
        initial registration statement and prior to effectiveness of the
        registration statement; and

- -       all documents filed by the Company with the SEC pursuant to Sections
        13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this
        prospectus and prior to the termination of this offering.

        You should rely only on the information incorporated by reference or set
forth in this prospectus or the applicable prospectus supplement. We have not
authorized anyone else to provide you with different information. We may only
use this prospectus to sell securities if it is accompanied by a prospectus
supplement. We are only offering these securities in states where the offer is
permitted. You should not assume that the information in this prospectus or the
applicable prospectus supplement is accurate as of any date other than the dates
on the front of these documents.

                                   THE COMPANY

        SDL designs, manufactures and markets fiber optic related products,
lasers and optoelectronic systems. Its products are used in a diversity of
markets such as telecommunications, cable television, dense wavelength division
multiplexing ("DWDM"), satellite communications, printing, medical and materials
processing.

        SDL was established in 1983 as a joint venture between Xerox and
Spectra-Physics to develop and commercialize semiconductor laser technology. The
management of SDL led a group to buy-out the joint venture partners in 1992 and
the Company issued its common stock to the public in an initial public offering
in 1995 and was admitted to NASDAQ at the same time. SDL's technical staff,
including over fifty PhDs, represents one of the largest investments in core
technology in the photonics industry. From the original products introduced in
1984, SDL has expanded its product offering to over 200 standard products in
addition to providing custom design and packaging for original equipment
manufacturer ("OEM") customers. SDL's revenue also includes revenue from
customer-funded research programs.

        By 1995, the management of SDL recognized that its core technical
strengths of high reliability and high power were particularly well-suited to
the growing market opportunity in fiber optic communications. Since the
acquisition of Seastar Optics in 1995, SDL's strategy has increasingly focused
on providing solutions for optical communications. SDL's optical communications
products power the transmission of data, voice and Internet information over
fiber optic networks to meet the needs of telecommunications, DWDM, cable
television and satellite communications applications. Led by growth in shipments
of its flagship 980 nm semiconductor laser pump module, revenue in 1998 from
fiber optic products for terrestrial, undersea and cable television
communications increased by more than 100 percent compared with 1997. Overall,
communications-related revenue increased to 73 percent of total revenue in the
first half of 1999. In May 1999, in a transaction accounted for as a
pooling-of-interest, SDL completed the acquisition of IOC International plc
("IOC"), a United Kingdom-based provider of lithium niobate modulators. SDL
believes the merger with IOC will strengthen SDL's position in the transmitter
portion of the DWDM telecommunications market.

                                 USE OF PROCEEDS

        Unless otherwise indicated in the applicable prospectus supplement, the
Company intends to use the net proceeds of any sale of securities pursuant to
this prospectus for general corporate purposes.



                                       4
<PAGE>   7
                       RATIOS OF EARNINGS TO FIXED CHARGES

        The following table sets forth SDL's consolidated ratios of earnings to
fixed charges for the periods shown.

<TABLE>
<CAPTION>
                                        Six Months
                                       Ended June 30,
                                            1999              Year Ended December 31,
                                       --------------   --------------------------------
                                                        1998   1997   1996   1995   1994
                                                        ----   ----   ----   ----   ----
<S>                                    <C>              <C>    <C>    <C>    <C>    <C>
     Ratio of Earnings to Fixed
       Charges                             10.5x        8.1x   N/A    17.2x  N/A    4.1x
</TABLE>

        SDL had net losses for the years ended December 31, 1997 and 1995.
Consequently, earnings were insufficient to cover fixed charges by approximately
$23.9 million and $0.9 million in the years ended December 31, 1997 and 1995,
respectively.

        The ratio of earnings to fixed charges in computed as income before
income taxes, plus fixed charges, divided by fixed charges. Fixed charges
consist of interest expense and an estimated component of rental expense.


                           FORWARD LOOKING STATEMENTS

        Some of the information included and incorporated by reference in this
prospectus contains forward-looking statements, such as those pertaining to our
(including certain of our subsidiaries') technology, products, and business
performance. Forward-looking statements involve numerous risks and uncertainties
and you should not rely on them as predictions of future events. There is no
assurance that the events or circumstances reflected in forward-looking
statements will be achieved or will occur. You can identify forward-looking
statements by the use of forward-looking terminology such as "believes,"
"expects," "may," "will," "should," "seeks," "approximately," "intends,"
"plans," "pro forma," "estimates" or "anticipates" or the negative of these
words and phrases or similar words or phrases. You can also identify
forward-looking statements by discussions of strategy, plans or intentions.

        Forward-looking statements are necessarily dependent on assumptions,
data or methods that may be incorrect or imprecise and we may not be able to
realize them. We caution you not to place undue reliance on forward-looking
statements, which reflect our analysis only. It is important to note that the
Company's actual results could differ materially from those in such forward
looking statements. Among the factors that could cause actual results to differ
materially are the factors detailed below under the caption "Risk Factors". You
should also consult the risk factors listed in the Company's Reports on Form
10-K and Form 10-K/A for the year ended December 31, 1998, on the Form 10-Q for
the quarter ended March 31, 1999, on the Form 10-Q for the quarter ended June
30, 1999 and on other reports filed by SDL from time to time under the Exchange
Act.


                                  RISK FACTORS

        SDL has Experienced and Could Again Experience Manufacturing
Difficulties

        The manufacture of semiconductor lasers and related products and systems
that we sell is highly complex and precise, requiring production in a highly
controlled and clean environment. Changes in the manufacturing processes or the
inadvertent use of defective or contaminated materials by us or our suppliers
have in the past and could in the future significantly impair our ability to
achieve acceptable manufacturing yields and product reliability. If we do not
achieve acceptable yields or product reliability, our operating results and
customer relationships will be adversely affected. We rely almost exclusively on
our own production capability in:

        -  computer-aided chip and package design,

        -  wafer fabrication,

        -  wafer processing,



                                       5
<PAGE>   8

        -  device packaging,

        -  hybrid microelectronic packaging,

        -  printed circuit board testing, and

        -  final assembly and testing of products.

        Because we manufacture, package and test these components, products and
systems at our own facility, and because these components, products and systems
are not readily available from other sources, our business and results of
operations will be significantly impaired if our manufacturing is interrupted by
any of the following:

        -  shortages of parts of equipment,

        -  equipment failures,

        -  poor yields,

        -  fire or natural disaster, or

        -  otherwise.

        A significant portion of our production relies or occurs on equipment
for which we do not have a backup. To alleviate, at least in part, this
situation, we remodeled our front-end wafer fabrication facility and our
packaging and test facility. We cannot assure you that we will not experience
further start-up costs and yield problems in fully utilizing our increased wafer
capacity targeted by these remodeling efforts. In addition, we are deploying a
new manufacturing execution software system designed to further automate and
streamline our manufacturing processes, and there may be unforeseen deficiencies
in this system which could adversely affect our manufacturing processes. In the
event of any disruption in production by one of these machines or systems, our
business and results of operations could be materially adversely affected.
Furthermore, we have a limited number of employees dedicated to the operation
and maintenance of our equipment, loss of whom could affect our ability to
effectively operate and service our equipment. We experienced lower than
expected production yields on some of our products, including certain key
product lines during 1997 and the first half of 1998. This reduction in yields:

        -  adversely affected gross margins,

        -  delayed component, product and system shipments, and

        -  to a certain extent, delayed new orders booked.

        Although more recently, our yields have improved, we cannot assure you
that yields will continue to improve or not decline in the future, nor that in
the future our manufacturing yields will be acceptable to ship products on time.
To the extent that we experience lower than expected manufacturing yields or
experience any shipment delays, gross margins will likely be significantly
reduced and we could lose customers and experience reduced or delayed customer
orders and cancellation of existing backlog. We presently are ramping production
of some of our product lines by:

        -  hiring and training now personnel,

        -  acquiring new equipment, and

        -  expanding our packaging facilities and capabilities.



                                       6
<PAGE>   9
        Difficulties in starting production to meet expected demand and
schedules have occurred in the past and may occur in the future including the
following:

        -  quality problems could arise, yields could fall, and gross margins
           could be reduced during such a ramp.

        -  aggressive volume pricing for large long-term orders has been
           provided to certain customers.

        -  cost reductions in manufacturing are required to avoid a drop in
           gross margins for certain products sold to customers receiving volume
           pricing.

        These cost reductions may not occur rapidly enough to avoid a decrease
in gross margins on products sold under volume pricing terms. In that event, our
business and results of operations would be materially adversely affected.

        Our Business Depends on Developing Now Products and Applications

        Our current products serve many applications in the communications and
materials processing and printing markets. In many cases, our products are
substantially completed, but the customer's product incorporating our products
is not yet completed or the applications or markets for the customer's product
are new or emerging. In addition, some of our customers are currently in the
process of developing new products that are in various stages of development,
testing and qualification, and sometimes are in emerging applications or new
markets.

        We believe that rapid customer acceptance of our new products is key to
our financial results. A substantial portion of our products address markets
that are not now, and may never become, substantial commercial markets. We have
experienced, and are expected to continue to experience, fluctuation in customer
orders and competitive, technological and pricing constraints that may preclude
development of markets for our products and our customers' products.

        Our customers are often required to test and qualify laser pump modules,
transmitters, and marking systems among other new products for potential volume
applications. We cannot assure you that:

        -  we or our customers will continue their existing product development
           efforts, or if continued that such efforts will be successful,

        -  markets will develop for any of our technology or that pricing will
           enable such markets to develop, or

        -  other technology or products will not supersede our products or our
           customer's products.

        We may also be unable to develop new products on a timely schedule.
Moreover, even if we are successful in the timely development of new products
that are accepted in the market, we often experience lower margins on these
products. The lower margins are due to lower yields and other factors, and thus
we may be unable to manufacture and sell new products at an acceptable cost so
as to achieve acceptable gross margins.

        Our Growth and Expansion May Strain Our Resources

        We have on occasion been unable to manufacture products in quantities
sufficient to meet demand of our existing customer base and new customers. The
expansion in the scope of our operations has placed a considerable strain on our
management, financial, manufacturing and other resources and has required us to
implement and improve a variety of operating, financial and other systems,
procedures and controls. In addition, we are currently deploying a new
enterprise resource planning system.

        We cannot assure you that any existing or new systems, procedures or
controls will be adequate to support our operations or that our systems,
procedures and controls will be designed, implemented or improved in a
cost-effective and timely manner. Any failure to implement, improve and expand
such systems, procedures and



                                       7
<PAGE>   10
controls in an efficient manner at a pace consistent with our business could
have a material adverse effect on our business and results of operations.

        Our future success is dependent, in part, on our ability to attract,
assimilate and retain additional employees, including certain key personnel. We
will continue to need a substantial number of additional personnel, including
those with specialized skills, to commercialize our products and expand all
areas of our business in order to continue to grow. Competition for such
personnel is intense, and we cannot assure you that we will be able to attract,
assimilate or retain additional highly qualified personnel.

        Our Acquisition Strategy Poses Several Risks

        Our strategy involves the acquisition and integration of additional
companies' products, technologies and personnel. We have limited experience in
acquiring outside businesses. Acquisition of businesses requires substantial
time and attention of management personnel and may require additional equity or
debt financings. Furthermore, integration of newly established or acquired
businesses is often disruptive. Since we have acquired or in the future may
acquire one or more businesses, we cannot assure you that we will:

        -  identify appropriate targets,

        -  acquire such businesses on favorable terms, or

        -  be able to successfully integrate such organizations into our
           business.

        Failure to do so could significantly impair our business, financial
condition and results of operations.

        We Have Depended on Government Programs and Contracts

        We derived approximately 26 percent, 34 percent, and 40 percent of our
revenue during fiscal 1998, 1997, and 1996, respectively, directly and
indirectly from a variety of Federal government sources. We received
approximately 13 percent, 17 percent and 20 percent of our revenue for fiscal
1998, 1997 and 1996, respectively, from Lockheed Martin through several US
government and commercial programs. We derived almost all of our revenue from
Lockheed Martin during these periods from Federally-funded programs.

        The demand for certain of our services and products is directly related
to the level of funding of government programs. We believe that the success and
further development of our business is dependent, in significant part, upon the
continued existence and funding of such programs and upon our ability to
participate in such programs. For example, Federal programs funded substantially
all of our research revenue for 1998, 1997 and 1996. Most of our
Federally-funded programs are subject to renewal every one or two years, so that
continued work by us under these programs in future periods is not assured. For
example, we have been informed by Lockheed Martin that one of our largest
federally funded programs will wind down in 1999. Federally-funded programs are
subject to termination for convenience of the government agency, at which point
we would be reimbursed for related allowable costs incurred to the termination
date.

        Federally-funded contracts are subject to audit of pricing and actual
costs incurred, which have resulted, and could result in the future, in price
adjustments. The Federal government has in the past, and could in the future,
challenge our accounting methodology for computing indirect rates and allocating
indirect costs to government contracts. The government is currently challenging
certain indirect cost allocations. While we believe that amounts recorded on our
financial statements are adequate to cover all related risks, the government has
not concluded its investigation or agreed to a settlement with us. Although the
outcome of this matter cannot be determined at this time, we do not believe that
its outcome will have a material adverse effect on our financial position,
results of operations and cash flows. However, based on future developments, our
estimate of the outcome of these matters could change in the near term. In
addition, a change in our accounting practices in this area could result in
reduced profit margins on government contracts.



                                       8
<PAGE>   11
        We Depend Upon Key Personnel and May be Unable to Hire Qualified
Personnel

        Our future performance also depends in significant part upon the
continued service of our key technical and senior management personnel. The loss
of the services of one or more of our officers or other key employees could
significantly impair our business, operating results and financial condition.
While many of our current employees have many years of service with us, there
can be no assurance that we will be able to retain our existing personnel. If we
are unable to retain and hire additional personnel, our business and results of
operations could be materially and adversely affected. See also "Our Acquisition
Strategy Poses Several Risks."

        We Have Been Subject to Patent Infringement Claims

        The semiconductor, optoelectronics, communications, information and
laser industries are characterized by frequent litigation regarding patent and
other intellectual property rights. From time to time we have received and may
receive in the future, notice of claims of infringement of other parties'
proprietary rights and licensing offers to commercialize third party patent
rights. In addition, we cannot assure you that:

        -  additional infringement claims (or claims for indemnification
           resulting from infringement claims) will not be asserted against us,
           or

        -  that existing claims or any other assertions will not result in an
           injunction against the sale of infringing products or otherwise
           significantly impair our business and results of operations.

        In 1985, we first received correspondence from Rockwell International
Corporation alleging that we used a fabrication process that infringes
Rockwell's patent rights. Those allegations led to two related lawsuits, one of
which is still pending. The first lawsuit was filed in August 1993, when
Rockwell sued the Federal government in the United States Court of Federal
Claims, alleging infringement of these patent rights with respect to the
contracts the Federal government has had with at least 15 companies, including
us (Rockwell International Corporation v. the United States of America, No.
93-542C (US Ct. Fed. CO)). We were not originally named as a party to this
lawsuit. However, the Federal government asserted that, if it was held liable to
Rockwell for infringement of Rockwell's patent rights in connection with some of
its contracts with us, then we would be liable to indemnify the Federal
government for a portion of its liability on certain contracts.

        In June 1995, after Rockwell filed a second lawsuit against us in the
Northern District of California, we filed a motion to intervene in the first
lawsuit. That motion was granted on August 17, 1995. Upon intervening in the
Federal government's lawsuit, we filed an answer to Rockwell's complaint,
alleging that:

        -  Rockwell's patent was invalid and that we did not infringe Rockwell's
           patent,

        -  Rockwell's patent was unenforceable under the doctrine of inequitable
           conduct, and

        -  Rockwell's action is barred by the doctrines of laches and equitable
           estoppel.

        After extensive discovery, we moved, as did the Federal government, for
summary judgment on the ground that Rockwell's patent was invalid. By order
dated February 5, 1997, the Court of Federal Claims granted those motions and
entered judgment in our favor and in favor of the Federal government. However,
Rockwell appealed the Court of Federal Claims' decision, and on June 15, 1998,
the United States Court of Appeals for the Federal Circuit issued an opinion
vacating the judgment that had been entered in our favor and in favor of the
Federal government. The Federal Circuit held that the Court of Federal Claims
had erred in finding that there were no genuine disputes of material fact
concerning the obviousness of the Rockwell patent, and that the resolution of
this and other disputes requires a trial. The Federal Circuit:

        -  remanded the case back to the trial court for further proceedings on
           the issue of whether Rockwell's patent was invalid on obviousness
           grounds, and



                                       9
<PAGE>   12
        -  affirmed the Court of Federal Claims' denial of our motion for
           summary judgment of invalidity based on anticipation, as well as the
           Court of Federal Claims' claim construction.

        Subsequent to the Federal Circuit's action, Rockwell and the United
States reached a settlement in the first lawsuit which had been filed on August
1993. Pursuant to the settlement, a judgment was entered in Rockwell's favor
against the Federal government in the amount of $16,900,000. We did not
participate in the settlement. The Federal government has not again raised the
issue of our potential indemnity obligation.

        As noted above, we made our decision to intervene in the lawsuit filed
on August 1993 after Rockwell filed suit against us in the Northern District of
California in May 1995, alleging that we had infringed the Rockwell patent in
connection with our manufacture and sale of products to customers other than the
United States. Again, the complaint alleges that we used a fabrication process
that infringes the Rockwell patent (Rockwell International Corporation v. SDL,
Inc., No. C95-01729 MHP (US Dist. Ct., N.D. Cal.)). By its complaint, Rockwell
seeks a permanent injunction against us to:

        -  enjoin us from infringement of the Rockwell patent,

        -  require us to pay damages in an unspecified amount for our alleged
           past infringement of the patent, treble damages and attorneys' fees.

        The complaint was served on us on June 30, 1995, and we filed an answer
to the complaint on August 18, 1995, alleging that:

        -  Rockwell's patent is invalid,

        -  we did not infringe Rockwell's patent,

        -  Rockwell's patent is unenforceable under the doctrine of inequitable
           conduct, and

        -  Rockwell's action is barred by the doctrines of laches and equitable
           estoppel.

        On August 11, 1995, prior to filing our answer, we filed a motion to
stay this action based upon the pendency of the lawsuit brought the Federal
government. The District Court granted our motion to stay on September 15, 1995.
Subsequent to the settlement of the lawsuit against the Federal government, the
District Court lifted the stay, and discovery has re-commenced for the lawsuit
filed on May 1995.

        Although the Court of Federal Claims ruled in our favor, finding the
patent invalid on motion for summary judgment, the Court of Appeals for the
Federal Circuit reversed the summary judgment ruling, meaning that the issue of
validity needed to go to trial. Such a trial would now occur before a jury in
California. We believe that we have meritorious defenses to Rockwell's
allegations. It should be noted that the resolution of intellectual property
disputes is often fact intensive and, therefore, the results are inherently
uncertain. There can be no assurance that Rockwell will not ultimately prevail
in this dispute. If Rockwell were to prevail, Rockwell could be awarded
substantial monetary damages and/or an injunction against us for the sale of
infringing products. If this injunction were entered, we may seek to obtain a
license to use Rockwell's patent.

        We cannot assure you, however, that a license would be available on
reasonable terms or at all. The award of monetary damages against us, or the
grant of an injunction and failure to obtain a license to use Rockwell's patent
on commercially reasonable terms could have a material adverse effect on our
business and results of operations. Litigation of Rockwell's claim against us is
expected to involve significant expense to us and could divert the attention of
our technical and management personnel and could have a material adverse effect
on our business and results of operations.

        In addition, we are involved in various legal proceedings arising in the
ordinary course of our business.



                                       10
<PAGE>   13
        Orders from Our Customers Fluctuate

        Our product revenue is subject to fluctuations in customer orders.
Occasionally, some of our customers have ordered more products than they need in
a given period, thereby building up inventory and delaying placement of
subsequent orders until such inventory has been reduced. We may also build
inventory in anticipation of receiving new orders in the future. Also, customers
have occasionally placed large orders that they have subsequently cancelled. In
addition, due to the fact that our sales of our 980 nm pump module products
comprise a significant portion of our total revenues, our revenues are
particularly susceptible to customer order fluctuations for this product. These
fluctuations, cancellations and the failure to receive new orders can have
adverse effects on our business and results of operations. We may also have
incurred significant inventory or other expenses in preparing to fill such
orders prior to their cancellation. Virtually our entire backlog is subject to
cancellation. Cancellation of significant portions of our backlog, or delays in
scheduled delivery dates, could have a material adverse effect on our business
and results of operations.

        We Depend on Ownership of Our Technology and Our Technical Expertise

        Our future success and competitive position is dependent in part upon
our proprietary technology, and we rely in part on patent, trade secret,
trademark and copyright law to protect our intellectual property. There can be
no assurance that:

        -  any of the 127 patents owned or approximately 134 patents licensed by
           us will not be invalidated, circumvented, challenged or licensed to
           others,

        -  the rights granted under the patents will provide competitive
           advantages to us,

        -  any of our approximately 90 pending or future patent applications
           will be issued with the scope of the claims sought by us, if at all,
           or

        -  that others will not develop technologies that are similar or
           superior to our technology, duplicate our technology or design around
           the patents we own, or patent or assert patents on technology which
           we might use or intend to use.

        In addition, effective copyright and trade secret protection may be
unavailable, limited or not applied for in certain foreign countries. Our
technology is licensed on a non-exclusive basis from Xerox and other third
parties that may license such technology to others, including our competitors.
There can be no assurance that steps we take to protect our technology will
prevent misappropriation of such technology. In addition, litigation has been
necessary and may be necessary in the future:

        -  to enforce our patents and other intellectual property rights,

        -  to protect our trade secrets,

        -  to determine the validity and scope of the proprietary rights of
           others, or

        -  to defend against claims of infringement or invalidity of
           intellectual property rights developed internally or acquired from
           third parties.

        Litigation of this type has resulted in substantial costs and diversion
of resources and could have a material adverse effect on our business and
results of operations. Moreover, we may be required to participate in
interference proceedings to determine the propriety of inventions. These
proceedings could result in substantial cost to us.



                                       11
<PAGE>   14
        Our Markets Are Extremely Competitive

        Our various markets are highly competitive. We face current or potential
competition from four primary sources:

        -  direct competitors,

        -  potential entrants,

        -  suppliers of potential now technologies, and

        -  suppliers of existing alternative technologies.

        We offer a range of components, products and systems and have numerous
competitors worldwide in various segments of our markets. As the markets for our
products grow, new competitors have recently emerged and are likely to continue
to do so in the future. We also sell products and services to companies with
which we presently compete or in the future may compete and certain of our
customers have been or could be acquired by, or enter into strategic relations
with our competitors. In most of our product lines, our competitors and we are
working to develop new technologies, or improvements and modifications to
existing technologies, which will obsolete present products. Many of our
competitors have significantly greater financial, technical, manufacturing,
marketing, sales and other resources than we do. In addition, many of these
competitors may be able to respond more quickly to new or emerging technologies,
evolving industry trends and changes in customer requirements and to devote
greater resources to the development, promotion and sale of their products than
we. We cannot assure you that:

        -  our current or potential competitors have not already or will not in
           the future develop or acquire products or technologies comparable or
           superior to those that we developed,

        -  combine or merge with each other or our customers to form significant
           competitors,

        -  expand production capacity to more quickly meet customer supply
           requirements, or

        -  adapt more quickly than we do to now technologies, evolving industry
           trends and changing customer requirements.

        Increased competition has resulted and could, in the future, result in
price reductions, reduced margins or loss of market share, any of which could
materially and adversely affect our business and results of operations. We
cannot assure you that we will be able to compete successfully against current
and future competitors or that competitive pressures we face will not have a
material adverse effect on our business and results of operations. We expect
that both direct and indirect competition will increase in the future.
Additional competition could have an adverse material effect on our results of
operations through price reductions and loss of market share.

        We Have Risks of Doing Business Internationally

        Revenues from customers outside of the United States accounted for
approximately 27 percent, 25 percent and 21 percent, of our total revenue in
1998, 1997 and 1996, respectively. International revenue carries a number of
inherent risks, including:

        -  reduced protection for intellectual property rights in some
           countries,

        -  the impact of unstable environments in economies outside the United
           States,

        -  generally longer receivable collection periods,

        -  changes in regulatory environments,



                                       12
<PAGE>   15
        -  tariffs, and

        -  other potential trade barriers.

        In addition, some of our international revenue is subject to export
licensing and approvals by the Department of Commerce or other Federal
governmental agencies. Although to date, we have experienced little difficulty
in obtaining such licenses or approvals, the failure to obtain these licenses or
approvals or comply with such regulations in the future could have a material
adverse effect on our business and results of operations.

        We currently use local distributors in key industrialized countries and
local representatives in smaller markets. Although we have formal distribution
contracts with some of our distributors and representatives, some of our
relationships are currently on an informal basis. Most of our international
distributors and representatives offer only our products; however, certain
distributors offer competing products and we cannot assure you that additional
distributors and representatives will not also offer products that are
competitive with our products. We cannot assure you that our international
distributors and representatives will enter into formal distribution agreements
at all or on acceptable terms, will not terminate informal or contractual
relationships, will continue to sell our products or that we will provide the
distributors and resellers with adequate levels of support. Our business and
results of operations will be affected adversely if we lose a significant number
of our international distributors and representatives or experience a decrease
in revenue from these distributors and representatives.

        We Are Subject to Extensive Environmental Regulation

        We are subject to a variety of federal, state and local laws and
regulations concerning the storage, use, discharge and disposal of toxic,
volatile, or otherwise hazardous or regulated chemicals or materials used in our
manufacturing processes. Further, we are subject to other safety, labeling and
training regulations as required by local, state and federal law. We have
established an environmental and safety compliance program to meet the
objectives of applicable federal, state and local laws. Our environmental and
safety department administers this compliance program which includes monitoring,
measuring and reporting compliance, establishing safety programs and training
our personnel in environmental and safety matters. We cannot assure you that
changes in these regulations and laws will not have an adverse economic effect
on us. Further, these local, state, and federal regulations could restrict our
ability to expand our operations. If we do not:

        -  obtain required permits for,

        -  operate within regulations for,

        -  control the use of, or

        -  adequately restrict

the discharge of hazardous or regulated substances or materials under present or
future regulations, we may be required to pay substantial penalties, to make
costly changes in our manufacturing processes or facilities or to suspend our
operations.

        We Have Limited or Sole Source Suppliers for Necessary Materials

        We depend on a single or limited number of outside contractors and
suppliers for raw materials, packages and standard components, and to assemble
printed circuit boards. We generally purchase these products through standard
purchase orders or one-year supply agreements. We do not have long-term
guaranteed supply agreements with these suppliers. We seek to maintain a
sufficient safety stock to overcome short-term shipping delays or supply
interruptions by our suppliers. We also endeavor to maintain ongoing
communications with our suppliers to guard against interruptions in supply. To
date, we have generally been able to obtain sufficient supplies in a timely
manner. However, our business and results of operations have in the past been
and could be impaired by:



                                       13
<PAGE>   16

        -  a stoppage or delay of supply,

        -  substitution of more expensive or less reliable parts,

        -  receipt of defective parts or contaminated materials, and

        -  an increase in the price of such supplies or our inability to obtain
           reduced pricing from our suppliers in response to competitive
           pressures.

        Our Stock Price Has Been and May Continue to be Volatile

        The market price of our common stock may fluctuate significantly because
of:

        -  announcements of technological innovations,

        -  large customer orders,

        -  customer order delays or cancellations,

        -  customer qualification delays,

        -  new products by us, our competitors or third parties,

        -  possible acquisition of us by a third party,

        -  merger or acquisition announcements,

        -  production problems,

        -  quarterly variations in our actual or anticipated results of
           operations, and

        -  developments in litigation in which we are involved.

        Furthermore, the stock market has experienced extreme price and volume
volatility, which has particularly affected the market prices of many high
technology companies. This volatility has often been unrelated to the operating
performance of such companies. This broad market volatility may adversely affect
the market price of our common stock. Many companies in the optical
communications industry have in the past year experienced historical highs in
the market prices of their stock. We cannot assure you that the market price of
our common stock will not experience significant volatility in the future,
including volatility that is unrelated to our performance.


                           DESCRIPTION OF COMMON STOCK

        SDL is authorized to issue up to 70,000,000 shares of common stock,
$0.001 par value per share.

        On May 18, 1999, SDL issued 1,130,098 post-split shares in connection
with the acquisition of IOC International plc. The Company has also recently
effected a two-for-one stock split of its common stock in the form of a stock
dividend. Trading on a post-split basis occurred on June 3, 1999. As of July 30,
1999, 31,249,752 shares of SDL's common stock were outstanding. The holders of
common stock are entitled to one vote for each share held of record on all
matters submitted to a vote of the stockholders. Holders of common stock have
cumulative voting rights in the election of directors. Subject to preferences
that may be granted to any then outstanding preferred stock, holders of common
stock are entitled to receive ratably such dividends as may be declared by the
Board of Directors out of funds legally available therefor. In the event of a
liquidation, dissolution or winding up of SDL, holders of common stock are
entitled to share ratably in all assets of SDL remaining after payment of
liabilities and the



                                       14
<PAGE>   17
liquidation of any then outstanding preferred stock. Each share of common stock
also has a preferred stock purchase right under the Company's stockholder rights
agreement. See "Delaware Law and Certain Charter Provisions - Stockholder
Rights Agreement," below. Holders of common stock have no preemptive or other
subscription or conversion rights. There are no redemption or sinking fund
provisions applicable to the common stock. All outstanding shares of common
stock are, and all shares of common stock to be outstanding upon completion of
any offering pursuant to this prospectus will be validly issued, fully paid and
non-assessable.

        The common stock is listed on the NASDAQ National Market System under
the symbol "SDLI." The transfer agent and registrar for our common stock is
Chase Mellon Shareholder Services.

                         DESCRIPTION OF PREFERRED STOCK

        The board of directors has the authority, without further action by the
stockholders, to issue up to 1,000,000 shares of preferred stock in one or more
series and to fix the rights, preferences, privileges and restrictions thereof,
including dividend rights, conversion rights, voting rights, terms of
redemption, liquidation preferences, sinking fund terms and the number of shares
constituting any series or the designation of such series, without any further
vote or action by stockholders. No shares of preferred stock of SDL are
outstanding. Of the 1,000,000 shares of preferred stock authorized, SDL has
designated 261,628 shares of the preferred stock as Series A Preferred Stock,
par value $0.001 per share. SDL has authorized the issuance of shares of Series
B Preferred Stock and 300,000 shares of the Preferred Stock as Series B
Preferred Stock, par value $0.001 per share upon exercise of certain preferred
stock purchase rights associated with each share of common stock outstanding.
See "Delaware Law and Certain Charter Provision - Stockholder Rights Agreement"
below.

        General

        Because the Board of Directors has the power to establish the
preferences, powers and rights of each class of preferred stock, it may afford
the holders of any class of preferred stock preferences, powers and rights,
voting or otherwise, senior to the rights of holders of shares of common stock.
The issuance of preferred stock could adversely affect the voting power of
holders of common stock and the likelihood that such holders will receive
dividend payments and payments upon liquidation and could have the effect of
delaying, deferring or preventing a change in control of SDL. SDL has no present
plan to issue any shares of preferred stock.

        Preferred stock, upon issuance against full payment of the purchase
price therefor, will be fully paid and nonassessable. The specific terms of a
particular class of preferred stock will be described in the prospectus
supplement relating to that class, including a prospectus supplement providing
that preferred stock may be issuable upon the exercise of warrants. The
description of preferred stock set forth below and the description of the terms
of a particular class of preferred stock set forth in a prospectus supplement do
not purport to be complete and are qualified in their entirety by reference to
the Certificate of Designation relating to that class.

        The preferences and other terms of the preferred stock of each class
will be fixed by the Certificate of Designation relating to the class. A
prospectus supplement relating to each class of preferred stock will specify the
following terms:

        -  The title and stated value of the preferred stock;

        -  The number of shares of the preferred stock offered, the liquidation
           preference per share and the offering price of the preferred stock;

        -  The dividend rate(s), period(s), and/or payment date(s) or method(s)
           of calculation thereof applicable to the preferred stock;

        -  Whether the preferred stock is cumulative or not and, if cumulative,
           the date from which dividends on the preferred stock will accumulate;



                                       15
<PAGE>   18
        -  The provision for a sinking fund, if any, for the preferred stock;

        -  The provision for redemption, if applicable, of the preferred stock;

        -  Any listing of the preferred stock on any securities exchange;

        -  The terms and conditions, if applicable, upon which the preferred
           stock will be converted into common stock, including the conversion
           price (or manner of calculation thereof);

        -  A discussion of any material federal income tax considerations
           applicable to the preferred stock;

        -  The relative ranking and preferences of the preferred stock as to
           dividend rights and rights upon liquidation, dissolution or winding
           up of our affairs;

        -  Any limitations on issuance of any class of preferred stock ranking
           senior to or on a parity with such class or series of preferred stock
           as to dividend rights and rights upon liquidation, dissolution or
           winding up of our affairs;

        -  Any other specific terms, preferences, rights, limitations or
           restrictions of the preferred stock; and

        -  Any voting rights of the preferred stock.

        Rank

        Unless otherwise specified in the applicable prospectus supplement, the
preferred stock will be, with respect to dividends and upon our voluntary or
involuntary liquidation, dissolution or winding up:

        -  senior to all classes or series of common stock and to all of our
           equity securities the terms of which provide that the equity
           securities shall rank junior to the preferred stock;

        -  junior to all equity securities that we issue which rank senior to
           the preferred stock; and

        -  on a parity with all equity securities that we issued other than
           those that are referred to in the bullet points above.

        The term "equity securities" does not include convertible debt
securities.

                        DESCRIPTION OF DEPOSITARY SHARES

        General

        We may issue depositary shares, each of which will represent a
fractional interest of a share of a particular class of preferred stock, as
specified in the applicable prospectus supplement. We will deposit with a
depositary (the "preferred stock depositary") shares of a class of preferred
stock represented by depositary shares pursuant to a separate deposit agreement
among the Company, the preferred stock depositary and the holders from time to
time of the depositary receipts issued by the preferred stock depositary which
will evidence the depositary shares ("depositary receipts"). Subject to the
terms of the deposit agreement, each owner of a depositary receipt will be
entitled, in proportion to the fractional interest of a share of a particular
class of preferred stock represented by the depositary shares evidenced by the
depositary receipt, to all the rights and preferences of the class of the
preferred stock represented by the depositary shares (including dividend,
voting, conversion, redemption and liquidation rights).

The depositary shares will be evidenced by depositary receipts issued pursuant
to the applicable deposit agreement. Immediately after we issue and deliver the
preferred stock to a preferred stock depositary, we will cause



                                       16
<PAGE>   19
the preferred stock depositary to issue the depositary receipts on our behalf.
You may obtain copies of the applicable form of deposit agreement and depositary
receipt from us upon request. The statements made in this section relating to
the deposit agreement and the depositary receipt are summaries of certain
anticipated provisions. These summaries are not complete and may be modified by
the applicable prospectus supplement. For more detail you should refer to the
deposit agreement itself, which will be filed as an exhibit to the registration
statement of which this prospectus is a part or incorporated by reference in
this registration statement by a Form 8-K.

        Dividends and Other Distributions

        The preferred stock depositary will distribute all cash dividends or
other cash distributions received in respect of a class or series of preferred
stock to the record holders of depositary receipts evidencing the related
depositary shares in proportion to the number of depositary receipts owned by
such holders, subject to certain obligations of holders to file proofs,
certificates and other information and to pay certain charges and expenses to
the preferred stock depositary.

        In the event of a distribution other than in cash, the preferred stock
depositary will distribute property that it receives to the record holders of
depositary receipts entitled to the property, subject to certain obligations of
holders to file proofs, certificates and other information and to pay certain
charges and expenses to the preferred stock depositary, unless the preferred
stock depositary determines that it is not feasible to make the distribution, in
which case the preferred stock depositary may, with our approval, sell the
property and distribute the net proceeds from the sale to the holders.

        Withdrawal of Stock

        Upon surrender of the depositary receipts at the corporate trust office
of the preferred stock depositary, the holders will be entitled to delivery at
the corporate trust office, or upon each such holder's order, of the number of
whole or fractional shares of the class or series of preferred stock and any
money or other property represented by the depositary shares evidenced by such
depositary receipts. Holders of depositary receipts will be entitled to receive
whole or fractional shares of the related class or series of preferred stock on
the basis of the proportion of preferred stock represented by each depositary
share as specified in the applicable prospectus supplement, but holders of such
shares of preferred stock will not thereafter be entitled to receive depositary
shares therefor. 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 shares of preferred stock to be withdrawn, the
preferred stock depositary will deliver to such holder at the same time a new
depositary receipt evidencing the excess number of depositary shares.

        Redemption of Depositary Shares

        Whenever we redeem shares of preferred stock held by the preferred stock
depositary, the preferred stock depositary will redeem as of the same redemption
date the number of the depositary shares representing shares of such class or
series of preferred stock so redeemed, provided we shall have paid in full to
the preferred stock depositary the redemption price of the preferred stock to be
redeemed plus an amount equal to any accrued and unpaid dividends on the
preferred stock to the date fixed for redemption. The redemption price per
depositary share will be equal to the corresponding portion of the redemption
price and any other amounts per share payable with respect to such class or
series of preferred stock. If we redeem fewer than all the depositary shares, we
will select the depositary shares that we will redeem pro rata (as nearly as may
be practicable without creating fractional depositary shares), by lot or by any
other equitable method that we determine.

        From and after the date fixed for redemption, all dividends in respect
of the shares of a class or series of preferred stock so called for redemption
will cease to accrue, the depositary shares called for redemption will no longer
be deemed to be outstanding and all rights of the holders of the depositary
receipts evidencing the depositary shares so called for redemption will cease,
except the right to receive any moneys payable upon redemption and any money or
other property to which the holders of the depositary receipts were entitled
upon redemption upon surrender of the depositary receipts to the preferred stock
depositary.



                                       17
<PAGE>   20
        Voting of the Preferred Stock

        Upon receipt of notice of any meeting at which the holders of a class of
preferred stock deposited with the preferred stock depositary are entitled to
vote, the preferred stock depositary will mail the information contained in the
notice of meeting to the record holders of the depositary receipts evidencing
the depositary shares which represent such class of preferred stock. Each record
holder of depositary receipts evidencing depositary shares on the record date
(which will be the same date as the record date for such class of preferred
stock) will be entitled to instruct the preferred stock depositary as to the
exercise of the voting rights pertaining to the amount of preferred stock
represented by the holder's depositary shares. The preferred stock depositary
will vote the amount of such class or series of preferred stock represented by
the depositary shares in accordance with such instructions, and we will agree to
take all reasonable action which the preferred stock depositary may deem
necessary in order to enable the preferred stock depositary to do so. The
preferred stock depositary will abstain from voting the amount of preferred
stock represented by the depositary shares to the extent it does not receive
specific instructions from the holders of depositary receipts evidencing the
depositary shares. The preferred stock depositary will not be responsible for
any failure to carry out any instruction to vote, or for the manner or effect of
any such vote made, as long as any such action or non-action is in good faith
and does not result from the preferred stock depositary's negligence or willful
misconduct.

        Liquidation Preference

        In the event that we voluntarily or involuntarily liquidate, dissolve or
wind up, the holders of each depositary receipt will be entitled to the fraction
of the liquidation preference accorded each share of preferred stock represented
by the depositary share evidenced by the depositary receipt as set forth in the
applicable prospectus supplement.

        Conversion of Preferred Stock

        The depositary shares, as such, will not be convertible into common
stock or any other securities or property. Nevertheless, if stated in the
applicable prospectus supplement relating to an offering of depositary shares,
holders may surrender depositary receipts to the applicable preferred stock
depositary with written instructions to the preferred stock depositary to
instruct us to cause conversion of a class or series of preferred stock
represented by the depositary shares evidenced by the depositary receipts into
whole shares of common stock, other shares of a class or series of preferred
stock or other shares of stock, and we have agreed that upon receipt of these
instructions and any amounts payable, we will cause the conversion of the shares
of preferred stock utilizing the same procedures as those provided for delivery
of preferred stock to effect the conversion. If we convert only a portion of
depositary shares evidenced by a depositary receipt, we will issue a depositary
receipt or receipts for any depositary shares that we do not covert. We will not
issue fractional shares of common stock upon conversion, and if conversion will
result in a fractional share, we will pay an amount in cash by equal to the
value of the fractional interest based upon the closing price of our common
stock on the last business day prior to the conversion.

        Amendment and Termination of A Deposit Agreement

        The form of depositary receipt evidencing depositary shares which
represent the preferred stock and any provision of the deposit agreement may at
any time be amended by agreement between us and the preferred stock depositary.
However, any amendment that materially and adversely alters the rights of the
holders of depositary receipts or that would be materially or adversely
inconsistent with the rights granted to the holders of the related preferred
stock will not be effective unless such amendment has been approved by the
existing holders of at least two-thirds of the applicable depositary shares
evidenced by the applicable depositary receipts then outstanding. No amendment
will impair the right, subject to certain anticipated exceptions in the deposit
agreements, of any holder of depositary receipts to surrender any depositary
receipt with instructions to deliver to the holder the related class of
preferred stock and all money and other property, if any, represented by the
depositary receipt, except in order to comply with law. Every holder of an
outstanding depositary receipt at the time any such amendment becomes effective
will be deemed, by continuing to hold such depositary receipt, to consent and
agree to such amendment and to be bound by the applicable deposit agreement as
amended.



                                       18
<PAGE>   21
        Charges of A Preferred Stock Depositary

        We will pay all transfer and other taxes and governmental charges
arising solely from the existence of the deposit agreement. In addition, we will
pay the fees and expenses of the preferred stock depositary in connection with
the performance of our duties under the deposit agreement. However, holders of
depositary receipts will pay the fees and expenses of the preferred stock
depositary for any duties requested by the holders to be performed which are
outside of those expressly provided for in the deposit agreement.

        Resignation and Removal of Depositary

        The preferred stock depositary may resign at any time by delivering to
us notice of its election to do so, and we may at any time remove the preferred
stock depositary, any such resignation or removal to take effect upon the
appointment of a successor preferred stock depositary. A successor preferred
stock depositary must be appointed within 60 days after delivery of the notice
of resignation or removal and must be a bank or trust company with its principal
office in the United States and a combined capital and surplus of at least
$50,000,000.

        Miscellaneous

        The preferred stock depositary will forward to holders of depositary
receipts any reports and communications from us which are received by the
preferred stock depositary with respect to the related preferred stock.

        We will not be liable, and the preferred stock depositary will not be
liable, if we are prevented or it is prevented from or delayed in, by law or any
circumstances beyond its or our control, performing the obligations under the
deposit agreement. Our obligations and the obligations of the preferred stock
depositary under the deposit agreement will be limited to performing our duties
in good faith and without negligence (in the case of any action or inaction in
the voting of a class or series of preferred stock represented by the depositary
shares), gross negligence or willful misconduct. We will not be obligated, and
the preferred stock depositary will not be obligated, to prosecute or defend any
legal proceeding in respect of any depositary receipts, depositary shares or
shares of a class or series of preferred stock represented thereby unless
satisfactory indemnity is furnished. We may rely on, and the preferred stock
depositary may rely on, written advice of counsel or accountants, or information
provided by persons presenting shares of preferred stock represented thereby for
deposit, holders of depositary receipts or other persons that we believe in good
faith to be competent to give such information, and on documents that we believe
in good faith to be genuine and signed by a proper party.

        If a preferred stock depositary receives conflicting claims, requests or
instructions from any holders of depositary receipts, on the one hand, and from
us, on the other hand, the preferred stock depositary will be entitled to act on
such claims, requests or instructions received by us.

                             DESCRIPTION OF WARRANTS

        We currently have no warrants outstanding (other than options issued
under our stock option plans). We may issue warrants for the purchase of common
stock or preferred stock. We may issue warrants independently or together with
any other securities offered pursuant to any prospectus supplement and warrants
may be attached to or separate from such securities. We will issue each series
of warrants under a separate warrant agreement that we will enter into with a
warrant agent specified in the applicable prospectus supplement. The warrant
agent will act solely as our agent in connection with the warrants of such
series and will not assume any obligation or relationship of agency or trust for
or with any provisions of the warrants. We will set forth additional terms of
the warrants and the applicable warrant agreements in the applicable prospectus
supplement.

        The applicable prospectus supplement will describe the terms of the
warrants in respect of which we are delivering this prospectus, including, where
applicable, the following:

        -  the title of the warrants;



                                       19
<PAGE>   22

        -  the aggregate number of the warrants;

        -  the price or prices at which the warrants will be issued;

        -  the designation, terms and number of shares of preferred stock or
           common stock purchasable upon exercise of the warrants;

        -  the designation and terms of any securities with which the warrants
           are issued and the number of any warrants issued with each such
           security;

        -  the date, if any, on and after which the warrants and the related
           preferred stock or common stock will be separately transferable;

        -  the price at which each share of preferred stock or common stock
           purchasable upon exercise of the warrants may be purchased;

        -  the date on which the right to exercise the warrants will commence
           and the date on which the right will expire;

        -  the minimum or maximum amount of the warrants which may be exercised
           at any one time;

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

        -  a discussion of certain federal income tax considerations; and

        -  any other terms of the warrants, including terms, procedures and
           limitations relating to the exchange and exercise of the warrants.

                         DESCRIPTION OF DEBT SECURITIES

        General

        The debt securities may be secured or unsecured and may be senior or
subordinated indebtedness of the Company. Unless otherwise specified in the
applicable prospectus supplement, the debt securities are to be issued under an
indenture, as amended or supplemented from time to time, among the Company and a
trustee chosen by the Company and qualified to act as trustee under the Trust
Indenture Act of 1939, as amended. The indenture is subject to, and governed by,
the Trust Indenture Act of 1939, as amended. The statements made in this section
relating to the indenture and the debt securities are summaries of certain
provisions of the debt securities and the indenture. These summaries are not
complete. For more detail you should refer to the indenture, which we have filed
as an exhibit to the registration statement of which this prospectus is a part.

        Term

        We will describe the particular terms of the debt securities offered by
a prospectus supplement in the applicable prospectus supplement, along with any
applicable modifications of or additions to the general terms of the debt
securities as described in this prospectus. Accordingly, for a description of
the terms of any series of debt securities, you must refer to both the
prospectus supplement relating to that series and the description of the debt
securities set forth in this prospectus. A prospectus supplement may change any
of the terms of the debt securities described in this prospectus.

The Company may offer under this prospectus up to $300,000,000 (or its
equivalent in another currency based on the exchange rate at the time of sale)
aggregate principal amount of debt securities or if debt securities are issued
at a discount, such principal amount as may be sold for an initial public
offering price of up to $300,000,000. Unless we state otherwise in any
prospectus supplement, the Company may issue the debt securities in one or more



                                       20
<PAGE>   23
series, as established from time to time by the Company. The Company need not
issue all debt securities of one series at the same time and, unless otherwise
provided, a series may be reopened, without the consent of the holders of the
debt securities of that series, for issuances of additional debt securities of
that series.

        The Company may, but need not, designate more than one trustee under the
indenture, each with respect to one or more series of debt securities. Any
trustee may resign or be removed with respect to one or more series of debt
securities, and a successor trustee may be appointed to act with respect to the
series. If two or more persons are acting as trustee with respect to different
series of debt securities, each such trustee will be a trustee of a trust under
the indenture separate and apart from the trust administered by any other
trustee and, except as we state otherwise in this prospectus, any action to be
taken by a trustee may be taken by each trustee with respect to, and only with
respect to, the one or more series of debt securities for which it is trustee.

        The following summaries set forth certain general terms and provisions
of the indenture and the debt securities. The prospectus supplement relating to
the series of debt securities being offered will contain further terms of the
debt securities, including the following specific terms:

        - the title of the debt securities;

        - the limit on the aggregate principal amount of the debt securities of
the series that may be authenticated and delivered under the indenture;

        - the date or dates, or the method for determining the date or dates, on
which the Company will pay the principal of the debt securities;

        - the rate or rates (which may be fixed or variable), or the method by
which such rate or rates will be determined, at which the debt securities will
bear interest, if any;

        - the date or dates (or the method for determining the date or dates)
from which any interest will accrue, the dates upon which any interest will be
payable and the record dates for payment of interest (or the method by which the
record dates will be determined);

        - the place or places, if any, other than or in addition to the Borough
of Manhattan, The City of New York, where the principal of (and premium, if any)
and interest, if any, on the debt securities will be payable, where the debt
securities may be surrendered for conversion or registration of transfer or
exchange and where notices or demands to or upon the Company in respect of the
debt securities and the indenture may be served;

        - any obligation the Company has to redeem, repay or repurchase the debt
securities, in whole or in part, at the option of a holder of the debt
securities, and the period or periods within which, the date or dates on which
the price or prices at which and the terms and conditions upon which the Company
will redeem, repay or repurchase the debt securities;

        - if other than the trustee, the identity of each security registrar
and/or paying agent;

        - any conversion or exchange provisions of the debt securities;

        - any provisions granting special rights to holders of the debt
securities;

        - any deletions from, modifications of, or additions to the events of
default or covenants of the Company with respect to the debt securities, whether
or not such events of default or covenants are consistent with the events of
default or covenants with the indenture;

        - the person to whom any interest will be payable, if other than the
person in whose name the debt security is registered; and



                                       21
<PAGE>   24
        - any other terms of the debt securities and any deletions from or
modifications or additions to the indenture in respect of the debt securities
(whether or not consistent with the other provisions of the indenture).

        The Company may issue debt securities at a discount below their
principal amount and provide for less than the entire principal amount of the
debt securities to be payable upon declaration of acceleration of maturity. In
such cases, we will describe any material U.S. federal income tax, accounting
and other considerations in the applicable prospectus supplement.

        Conversion and Exchange

        The applicable prospectus supplement will specify the terms and
conditions, if any, on which debt securities of any series are convertible into
or exchangeable for common stock or preferred stock. Such terms may include
provisions for conversion or exchange, either mandatory, at the option of the
holder, or at the option of SDL, in which the number of shares of common stock
or preferred stock to be received by the holders of the debt securities would be
calculated according to the market price of common stock or preferred stock as
of a time stated in the prospectus supplement.

        Denominations and Interest

        Unless we specify otherwise in the applicable prospectus supplement, the
debt securities of any series will be issuable in denominations of $1,000 and
integral multiples thereof. Unless we specify otherwise in the applicable
prospectus supplement, interest on any series of debt securities will be payable
to the person in whose name the security is registered at the close of business
on the record date for such interest at the office of the Company maintained for
such purpose within the City and State of New York. However, unless we provide
otherwise in the applicable prospectus supplement, the Company may make interest
payments by check mailed to the address of the person entitled to the interest
as it appears in the applicable register for debt securities or by wire transfer
of funds to such person at an account maintained within the United States.

        Global Notes

        Unless we specify otherwise in the applicable prospectus supplement, the
debt securities of each series will be issued in the form of one or more fully
registered book-entry debt securities of such series (each, a "Global Note")
that will be deposited with, or on behalf of The Depository Trust Company, New
York, New York ("DTC"). Global Notes will be issued in fully registered form.

        The Company anticipates that the Global Notes will be deposited with, or
on behalf of DTC, and that such Global Note will be registered in the name of
Cede & Co., DTC's nominee. Unless we specify otherwise in the applicable
prospectus supplement, the Company further anticipates that the following
provisions will apply to the depository arrangements with respect to the Global
Notes.

        So long as DTC or its nominee is the registered owner of the Global
Notes, DTC or its nominee, as the case may be, will be considered the sole
holder of the debt securities represented by the Global Note for all purposes
under the indenture. Except as described below, owners of beneficial interests
in the Global Notes will not be entitled to have debt securities represented by
such Global Note registered in their names, will not receive or be entitled to
receive physical delivery of debt securities in certificated form and will not
be considered the owners or holders of the debt securities under the indenture.
The laws of some states require that certain purchasers of securities take
physical delivery of such securities in certificated form; accordingly, such
laws may limit the transferability of beneficial interests in the Global Notes.

        The Global Notes will be exchangeable for certificated debt securities
only if:

        - DTC notifies the Company that it is unwilling or unable to continue as
depository or DTC ceases to be a clearing agency registered under the Exchange
Act (if so required by applicable law or regulation) and, in



                                       22
<PAGE>   25
either case, a successor depository is not appointed by the Company within 90
days after the Company receives such notice or becomes aware of such
ineligibility;

        - the Company in its sole discretion determines that the Global Notes
shall be exchangeable for certificated debt securities; or

        - there shall have occurred and be continuing an event of default with
respect to debt securities of any series under the indenture and beneficial
owners representing a majority in aggregate principal amount of the debt
securities of such series represented by a Global Note advise DTC to cease
acting as depository. Upon any such exchange, owners of a beneficial interest in
such Global Note will be entitled to physical delivery of individual debt
securities of such series in certificated form of like tenor, terms and rank,
equal in principal amount to such beneficial interest, and to have such debt
securities in certificated form registered in the names of the beneficial
owners, which names are expected to be provided by DTC's relevant Participants
(as identified by DTC) to the trustee.

Debt securities so issued in certificated form will be issued in denominations
of $1,000 or any integral multiple thereof, and will be issued in registered
form only, without coupons.

        Merger, Consolidation or Sale of Assets

        Unless we specify otherwise in the applicable prospectus supplement, the
indenture provides that the Company will not, in any transaction or series of
transactions, consolidate with, or sell, lease, assign, transfer or otherwise
convey all or substantially all of its assets to, or merge with or into any
other person unless:

        - either the Company is the continuing person or the successor person
(if other than the Company) formed by or resulting from any such consolidation
or merger or which shall have received the transfer of such assets shall
expressly assume payment of the principal of (and premium, if any) and interest
on all of debt securities, and the due and punctual performance and observance
of all of the covenants and conditions contained in the indenture;

        - immediately after giving effect to the transaction and treating any
debt which becomes an obligation of the Company or any of its subsidiaries as a
result of such transaction as having been incurred by the Company or such
subsidiary at the time of such transaction, no event of default under the
indenture, and no event which, after notice or lapse of time, or both, would
become an event of default, shall have occurred and be continuing; and

        - the Company delivers to the trustee an officers' certificate and legal
opinion covering these conditions.

In the event that the Company is not the continuing person, then, for purposes
of the second bullet point above, the successor person will be deemed to be the
Company.

        Upon any such merger, consolidation, sale, assignment, transfer, lease
or conveyance in which the Company is not the continuing legal entity, the
successor entity formed by the consolidation or into which the Company is merged
or to which the sale, assignment, transfer, lease or other conveyance is made
shall succeed to, and be substituted for, and may exercise every right and power
of, the Company under the indenture with the same effect as if the successor
entity has been named as the Company in the indenture and the Company will be
released (except in the case of a lease) from its obligations under the
indenture and the debt securities.

        Events of Default, Notice and Waiver

        Unless we specify otherwise in the applicable prospectus supplement, the
indenture provides that the following events are "events of default" with
respect to any series of debt securities issued under the indenture:



                                       23
<PAGE>   26
        - default in the payment of any interest upon any debt security of that
series when it becomes due and payable, and continuance of that default for a
period of 30 days;

        - default in the payment of principal of or premium, if any, on any debt
security of that series when due and payable;

        - default in the performance or breach of any covenant or warranty of
the Company in the indenture with respect to any debt security of that series
(other than a covenant or warranty the default or breach of which is
specifically dealt with in the indenture), which default continues uncured for a
period of 60 days after receipt of written notice as provided in the indenture;

        - the following:

        - default in the payment of an aggregate principal amount exceeding
$10,000,000 of any evidence of indebtedness of the Company or any mortgage,
indenture, note, bond, capitalized lease or other instrument under which such
indebtedness is issued or by which such indebtedness is secured, such default
having continued after the expiration of any applicable grace period and having
resulted in the acceleration of the maturity of such indebtedness, but only if
such indebtedness is not discharged or such acceleration is not rescinded or
annulled;

        - certain events of bankruptcy, insolvency or reorganization with
respect to the Company, the Company or any significant subsidiary of the Company
(as defined in Regulation S-X under the Securities Act); and

        - any other event of default provided with respect to debt securities of
that series that is described in the applicable prospectus supplement.

        A supplemental indenture establishing the terms of a particular series
of debt securities may delete, modify or add to the events of default described
above.

        No event of default with respect to a particular series of debt
securities necessarily constitutes an event of default with respect to any other
series of debt securities. The occurrence of an event of default may constitute
an event of default under our bank credit agreements in existence from time to
time. In addition, the occurrence of certain events of default or an
acceleration under the indenture may constitute an event of default under
certain of our other indebtedness outstanding from time to time.

        If an event of default with respect to debt securities of any series at
the time outstanding occurs and is continuing, then the trustee or the holders
of not less than a majority in principal amount of the outstanding debt
securities of that series may, by a notice in writing to us (and to the trustee
if given by the holders), declare all 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 the money due has been obtained by the trustee, the holders of a
majority in principal amount of the outstanding debt securities of that series
may rescind and annul the acceleration if:

        - the Company has paid or deposited with the trustee a sum sufficient to
pay:

        - all overdue installments of interest on all outstanding debt
securities of that series;

         - the principal of (and premium, if any, on) any outstanding debt
securities of that series which have become due otherwise than by such
declaration of acceleration, and interest thereon at the rates provided for in
such debt securities; and



                                       24
<PAGE>   27
        - to the extent lawful, interest upon overdue installments of interest
at the rate or rates provided in such debt securities; and

        - all events of default with respect to debt securities of that series,
other than the nonpayment of the principal of (or premium, if any) or interest
on debt securities of that series which have become due solely by such
declaration of acceleration, have been cured or waived.

        The indenture also provides that the holders of a majority in principal
amount of the outstanding debt securities of any series may on behalf of the
holders of all debt securities of such series waive any past default under the
indenture with respect to such debt securities and its consequences, except a
default:

        - in the payment of the principal of (or premium, if any) or interest on
or payable in respect of any debt security of such series; or

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

        If the trustee knows of a default with respect to the debt securities of
any series, the indenture requires the trustee, within 90 days after the
default, to give notice to the holders of such debt securities, unless such
default shall have been cured or waived. However the trustee may withhold notice
to the holders of any debt securities of such series of any default (except a
default in the payment of the principal of (or premium, if any) or interest, if
any, on any debt security of such series) if the trustee determines such
withholding is in the interest of such holders.

        The indenture provides that the trustee will be under no obligation to
exercise any of its rights or powers under the indenture at the request of any
holders of outstanding debt securities, unless the holders offer the trustee
security or indemnity reasonably satisfactory to it against the costs, expenses
and liabilities which might be incurred by it in compliance with such request.
Subject to certain rights of the trustee, the holders of a majority in principal
amount of the outstanding debt securities of any series will 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.

        No holder of any debt security of any series will have any right to
institute any proceeding, judicial or otherwise, with respect to the indenture
or for the appointment of a receiver or trustee, or for any remedy under the
indenture, unless:

        - that holder has previously given to the trustee written notice of a
continuing event of default with respect to debt securities of that series; and

        - the holders of a majority in principal amount of the outstanding debt
securities of that series have made a written request, and offered reasonable
indemnity, to the trustee to institute the proceeding as trustee, and the
trustee has not received from the holders of a majority in principal amount of
the outstanding debt securities of that series a direction inconsistent with
that request and has failed to institute the proceeding within 60 days.

        Notwithstanding the foregoing, the holder of any debt security will have
an absolute and unconditional right to receive payment of the principal of,
premium and any interest on that debt security on or after the due dates
expressed in that debt security and to institute suit for the enforcement of
payment.

        The indenture requires the Company, within 120 days after the end of
each fiscal year, to furnish to the trustee a statement as to compliance with
the indenture. Further, upon any request by the Company to take any action under
the indenture, the Company will furnish to the trustee:

        - an officers' certificate stating that all conditions precedent, if
any, provided for in the indenture relating to the proposed action have been
complied with; and



                                       25
<PAGE>   28
        - an opinion of counsel stating that in the opinion of such counsel all
such conditions precedent, if any, have been complied with.

        Modification and Waiver

        We may modify and amend the indenture with the consent of the holders of
a majority in principal amount of the outstanding debt securities of each series
affected by the modifications or amendments except that we may not make any
modification or amendment without the consent of the holders of each affected
debt security then outstanding if that amendment will:

        - change the stated maturity of the principal of (or premium, if any,
on) or any installment of principal of or interest on such debt security;

        - reduce the principal amount of debt securities or the rate or amount
of interest on such debt securities, or any premium payable on such debt
security;

        - adversely affect the right of any holder of debt securities to
repayment of such debt security at the holder's option;

        - change the place, or the currency, for payment of principal of (or
premium, if any) such debt security;

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

        - reduce the amount of debt securities whose holders must consent to an
amendment or waiver or reduce the quorum or voting requirements set forth in the
indenture; or

        - modify any of the foregoing provisions or any of the provisions
relating to the waiver of certain past defaults or certain covenants, except to
increase the required percentage to effect such action or to provide that
certain other provisions may not be modified or waived without the consent of
the holder of such debt security.

        The holders of a majority in principal amount of the outstanding debt
securities of any series may on behalf of the holders of all debt securities of
that series waive the Company's compliance with certain covenants of the
indenture.

        Modifications and amendments of the indenture may be made by the Company
and the trustee without the consent of any holder of debt securities issued
thereunder for any of the following purposes:

        - to evidence the succession of another person to the Company under the
indenture;

        - to add to the covenants of the Company for the benefit of the holders
of the debt securities or to surrender any right or power conferred upon the
Company in the indenture;

        - to add events of default for the benefit of the holders of all or any
series of debt securities;

        - to add or change any provisions of the indenture to facilitate the
issuance of the debt securities in certificated form, provided that such action
shall not adversely affect the interests of the holders of any debt securities
in any material respect;

        - to secure the debt securities;

        - to provide for the acceptance of appointment by a successor trustee or
to facilitate the administration of the trusts under the indenture by more than
one trustee;



                                       26
<PAGE>   29
         - to cure any ambiguity, defect or inconsistency in the indenture or to
add or change any other provisions with respect to matters or questions arising
under the indenture, provided that such action shall not adversely affect the
interests of holders of debt securities of any series or any related guarantees
in any material respect; or

        - to supplement any of the provisions of the indenture to the extent
necessary to permit or facilitate defeasance and discharge of any series of debt
securities, provided that such action shall not adversely affect the interests
of the holders of the debt securities in any material respect.

        The indenture provides that in determining whether the holders of the
requisite principal amount of outstanding debt securities of a series have given
any request, demand, authorization, direction, notice, consent or waiver under
the indenture or whether a quorum is present at a meeting of holders of the debt
securities of a series, debt securities of each series owned by the Company or
any other obligor upon such debt securities or any affiliate of the Company or
of such other obligor will be disregarded.

        The indenture contains provisions for convening meetings of the holders
of debt securities of a series. A meeting may be called at any time by the
trustee and also, upon request, by the Company or the Holders of 25% in
principal amount of the outstanding debt securities of such series, in any such
case upon notice given as provided in the indenture. Except for any consent that
must be given by the holder of each debt security affected by certain
modifications and amendments of the indenture, any resolution presented at a
meeting or adjourned meeting duly reconvened at which a quorum is present may be
adopted by the affirmative vote of the holders of a majority in principal amount
of the outstanding debt securities of such series. However, except as referred
to above, any resolution with respect to any request, demand, authorization,
direction, notice, consent, waiver or other action that may be made, given or
taken by the holders of a specified percentage, which is less or more than a
majority, in principal amount of the outstanding debt securities of such series
may be adopted at a meeting or adjourned meeting duly reconvened at which a
quorum is present by the affirmative vote of the holders of such specified
percentage in principal amount of the outstanding debt securities of such
series. Any resolution passed or decision taken at any meeting of holders of
debt securities of any series duly held in accordance with the indenture will be
binding on all holders of debt securities of such series. The quorum at any
meeting called to adopt a resolution, and at any reconvened meeting, will be
persons holding or representing a majority in principal amount of the
outstanding debt securities of any series; provided, however, that if any action
is to be taken at such meeting with respect to a consent or waiver which may be
given by the holders of not less than a specified percentage, which is less or
more than a majority, in principal amount of the outstanding debt securities of
such series, the persons holding or representing such specified percentage in
principal amount of the outstanding debt securities of such series will
constitute a quorum.

        Notwithstanding the provisions described above, the indenture provides
that if any action is to be taken at a meeting of holders of debt securities of
any series with respect to any request, demand, authorization, direction,
notice, consent, waiver or other action that the indenture expressly provides
may be made, given or taken by the holders of a specified percentage in
principal amount of all outstanding debt securities of such series affected
thereby:

        - there shall be no minimum quorum requirement for such meeting; and

        - the principal amount of the outstanding debt securities of such series
that are entitled to vote in favor of such request, demand, authorization,
direction, notice, consent, waiver or other action shall be taken into account
in determining whether such request, demand, authorization, direction, notice,
consent, waiver or other action has been made, given or taken under the
indenture.

        Defeasance of Debt Securities and Certain Covenants in Certain
Circumstances

        Legal Defeasance and Covenant Defeasance. Unless we specify otherwise in
the applicable prospectus supplement, the indenture provides that the Company
may elect:



                                       27
<PAGE>   30
        - to be discharged from any and all obligations in respect of the debt
securities of any series (except for certain obligations to register the
transfer or exchange of debt securities of such series, to replace stolen, lost
or mutilated debt securities of such series, and to maintain paying agencies and
certain provisions relating to the treatment of funds held by paying agents)
("legal defeasance"); or

        - to be released from compliance with the covenants in the indenture
("covenant defeasance").

        The Company will be so discharged upon the deposit with the trustee, in
trust, of money and/or Government Obligations that, through the payment of
interest and principal in accordance with their terms, will provide money in an
amount sufficient to pay and discharge each installment of principal (and
premium, if any) and interest on the debt securities of that series on the
scheduled due dates or the applicable redemption date in accordance with the
terms of the indenture and those debt securities.

        This trust may only be established if, among other things:

        - the Company has delivered to the trustee a legal opinion to the effect
that the holders of the debt securities will not recognize income, gain or loss
for United States federal income tax purposes as a result of such legal
defeasance or covenant defeasance and will be subject to United States federal
income tax on the same amounts, in the same manner and at the same times as
would have been the case if such legal defeasance or covenant defeasance had not
occurred, and such legal opinion, in the case of legal defeasance, must refer to
and be based upon a ruling of the Internal Revenue Service or a change in
applicable United States federal, income tax law occurring after the date of the
indenture;

        - such legal defeasance or covenant defeasance will not result in a
breach or violation of, or constitute a default under, the indenture or any
other material agreement or instrument to which the Company is a party or by
which it is bound; and

        - no event of default or event which with notice or lapse of time or
both would become an event of default with respect to the debt securities shall
have occurred and shall be continuing on the date of, or, solely in the case of
events of default due to certain events of bankruptcy, insolvency, or
reorganization, during the period ending on the 91st day after the date of, such
deposit into trust.

        "Government Obligations" means securities which are:

        - direct obligations of the United States of America, for the payment of
which obligations its full faith and credit is pledged; or

        - obligations of a person controlled or supervised by and acting as an
agency or instrumentality of the United States of America, the payment of which
is unconditionally guaranteed as a full faith and credit obligation by the
United States of America and which, in either of the above cases, are not
callable or redeemable at the option of the issuer thereof and also includes a
depository receipt issued by a bank or trust company as custodian with respect
to any such Government Obligation held by such custodian for the account of the
holder of a depository receipt, provided that (except as provided by law) such
custodian is not authorized to make any amount received by the custodian.

        Subordination

        The applicable prospectus supplement will set forth the terms and
conditions, if any, upon which the debt securities are subordinated to other
indebtedness of the Company. Such terms will include a description of the
indebtedness ranking senior to the debt securities, the restrictions on payments
to the holders of such debt securities while a default with respect to such
senior indebtedness is continuing, the restrictions, if any, on payments to the
holders of such debt securities following an event of default, and provisions
requiring holders of such debt securities to remit certain payment to holders of
senior indebtedness.



                                       28
<PAGE>   31
                   DELAWARE LAW AND CERTAIN CHARTER PROVISIONS

        Certain provisions of Delaware law and SDL's Restated Certificate of
Incorporation, as amended (the "Certificate") could make more difficult the
acquisition of SDL by means of a tender offer, a proxy contest or otherwise and
the removal of incumbent officers and directors. These provisions are expected
to discourage certain types of coercive takeover practices and inadequate bids
and to encourage persons seeking to acquire control of SDL to negotiate first
with SDL.

Delaware Statute

        SDL is subject to the provisions of Delaware General Corporation Law
section 203 (the "Delaware Statute"). In general, the Delaware Statute prohibits
certain business combinations between a publicly-held Delaware corporation, such
as SDL, and any "interested stockholder" for a period of three years after the
date on which the latter became an interested stockholder unless the business
combination is approved in a prescribed manner. A "business combination"
includes a merger, asset sale or other transaction resulting in financial
benefit to the interested stockholder. An "interested stockholder" is a person
who, together with affiliates and associates, owns (or within three years prior,
did own) 15 percent or more of the corporation's outstanding voting stock.

Classified board of directors

        The Certificate provides that, so long as the board of directors
consists of more than two directors, the board of directors will be divided into
three classes of directors serving staggered three-year terms. As a result,
approximately one-third of SDL's board of directors will be elected each year.
In addition, the Certificate provides for cumulative voting in the election of
directors, allowing the election of a director at each election by holders
representing a large minority of shares.

Advance notice for raising business or making nominations at meetings

        The Certificate establishes an advance notice procedure for bringing
business before an meeting of stockholders and for nominating (other than by or
at the direction of the Board of Directors) candidates for election as directors
at an annual meeting or a special meeting for the purpose of electing directors.
To be timely, notice of nominations or other business to be brought before an
annual meeting must be received by the Secretary of SDL not earlier than 90 nor
later than 60 days prior to the first anniversary of the preceding year's annual
meeting or, if the date of the annual meeting is advanced by more than 30 days
or delayed by more than 60 days from such anniversary, such notice must be
received not earlier than 90 days prior to such annual meeting and not later
than the later of: (i) the 60th day prior to the annual meeting; or (ii) the
10th day following the date on which notice of the date of the annual meeting
was mailed or public disclosure thereof was made, whichever occurs first.

Other charter provisions

        The Certificate provides that in determining whether to take or refrain
from taking corporate action on any matter, the Board of Directors may take into
account the interests of customers, employees and other constituencies of SDL
and its subsidiaries, including the effect upon communities in which SDL and its
subsidiaries do business, and may consider long-term as well as short-term
interests of SDL and its stockholders, in addition to any other considerations
which the Board of Directors may lawfully take into account.

Stockholder rights agreement

        On November 6, 1997, the Board of Directors adopted and approved a
stockholder rights agreement, as amended (the "SDL Rights Agreement") and
declared a dividend of one right (each a "Right") for each share of SDL common
stock outstanding on November 17, 1997. On February 11, 1999, SDL amended and
restated the SDL Rights Agreement to eliminate those provisions that require
that certain actions may only be taken by independent directors. The Rights have
certain anti-takeover effects and are intended to discourage coercive or unfair
takeover tactics and to encourage any potential acquirer to negotiate a price
fair to all SDL stockholders. The rights may



                                       29
<PAGE>   32
cause substantial dilution to an acquiring party that attempts to acquire SDL on
terms not approved by the Board of Directors, but they will not interfere with
any negotiated merger or other business combination. In the event that any
person or group (except for a certain existing stockholder of SDL so long as
such stockholder is not required to report its ownership on Schedule 13(D))
acquires beneficial ownership of fifteen (15) percent or more of the outstanding
shares of SDL's common stock as defined in the SDL Rights Agreement, each holder
of a Right, other than a Right beneficially owned by the acquiring person, will
thereafter have the right to receive upon exercise that number of shares of
SDL's common stock having a market value of two times the exercise price of the
Right. In addition, if at any time following such acquisition of fifteen (15)
percent or more of the outstanding common stock, SDL is acquired in a merger or
other business combination or transaction, or fifty (50) percent or more of its
consolidated assets or earning power are sold, each holder of a Right will
receive, upon exercise of that Right, that number of shares of common stock of
the acquiring company which, at the time of such transaction, will have a market
value of two times the exercise price of the Right.

                              PLAN OF DISTRIBUTION

        We may sell securities offered pursuant to any applicable prospectus
supplement directly to one or more purchasers or though agents or underwriters.
We may sell securities offered pursuant to any applicable prospectus supplement
in at-the-market equity offerings or on a negotiated or competitive bid basis
through underwriters or dealers or directly to other purchasers or through
agents. We will name any underwriter or agent involved in the offer and sale of
the securities in the applicable prospectus supplement.

        We may distribute the securities 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 prevailing market prices; or

        - at negotiated prices.

        The Company also may, from time to time, authorize underwriters acting
as the Company's agents to offer and sell securities upon the terms and
conditions as set forth in the applicable prospectus supplement. In connection
with the sale of the securities, underwriters may be deemed to have received
compensation from us in the form of underwriting discounts or commissions and
may also receive commissions from purchasers of securities for whom they may act
as agent. Underwriters may sell the securities to or through dealers, and
dealers may receive compensation in the form of discounts, concessions or
commissions from the underwriters and/or commissions from the purchasers for
whom they may act as agent.

        We will describe in the applicable prospectus supplement any
underwriting compensation we pay to underwriters or agents in connection with
the offering of the securities, and any discounts, concessions or commissions
allowed by underwriters to participating dealers. Dealers and agents
participating in the distribution of the securities may be deemed to be
underwriters, and any discounts and commissions received by them and any profit
realized by them on resale of the securities may be deemed to be underwriting
discounts and commissions. We may enter into agreements to indemnify
underwriters, dealers and agents against certain civil liabilities, including
liabilities under the Securities Act, and to reimburse these persons for certain
expenses. We will describe any indemnification agreements in the applicable
prospectus supplement.

        Unless we specify otherwise in the related prospectus supplement, each
series of securities offered will be a new issue with no established trading
market, other than the common stock which is listed on the NASDAQ National
Market System. Any shares of common stock sold pursuant to a prospectus
supplement may be listed on the NASDAQ National Market System, subject to
official notice of issuance. We may elect to list any series of preferred stock
and any series of debt securities, depository shares or warrants on any
exchange, but we are not obligated to do so. It is possible that one or more
underwriters may make a market in a series of offered securities,



                                       30
<PAGE>   33
but will not be obligated to do so and may discontinue any market making at any
time without notice. Therefore, no assurance can be given as to the liquidity of
the trading market for the securities.

        If indicated in the applicable prospectus supplement, we may authorize
dealers acting as our agents to solicit offers by certain institutions to
purchase the securities from us at the public offering price set forth in the
prospectus supplement pursuant to delayed delivery contracts providing for
payment and delivery on the date or dates stated in the prospectus supplement.
We may make delayed delivery with various institutions, including commercial and
savings banks, insurance companies, pension funds, investment companies and
educational and charitable institutions. Delayed delivery contracts will not be
subject to any conditions except:

        - the purchase by an institution of the securities covered by its
delayed delivery contracts shall not at the time of delivery be prohibited under
the laws of any jurisdiction in the United States to which the institution is
subject; and

        - if the securities are sold to underwriters, we shall have sold to the
underwriters the total principal amount of the offered securities less the
principal amount covered by the delayed delivery contracts.

        To facilitate the offering of the securities, certain persons
participating in the offering may engage in transactions that stabilize,
maintain, or otherwise affect the price of the securities. This may include
over-allotments or short sales of the securities, which involves the sale by
persons participating in the offering of more securities than we sold to them.
In these circumstances, these persons would cover the over-allotments or short
positions by making purchases in the open market or by exercising their
over-allotment option. In addition, these persons may stabilize or maintain the
price of the debt securities by bidding for or purchasing debt securities in the
open market or by imposing penalty bids, whereby selling concessions allowed to
dealers participating in the offering may be reclaimed if securities sold by
them are repurchased in connection with stabilization transactions. The effect
of these transactions may be to stabilize or maintain the market price of the
securities at a level above that which might otherwise prevail in the open
market. These transactions may be discontinued at any time.

        Certain of the underwriters and their affiliates may be customers of,
engage in transactions with and perform services for, us in the ordinary course
of business.


                                  LEGAL MATTERS

        The validity of the securities offered hereby will be passed upon for
the Company by Morrison & Foerster LLP, Palo Alto, California.


                                     EXPERTS

        The consolidated financial statements of SDL, Inc. incorporated by
reference in SDL, Inc.'s Annual Report (Form 10-K/A) for the year ended December
31, 1998, have been audited by Ernst & Young LLP, independent auditors, as set
forth in their report thereon incorporated by reference therein and incorporated
herein by reference. The supplemental consolidated financial statements of SDL,
Inc. appearing in SDL, Inc.'s Current Report on Form 8-K dated May 18, 1999 have
been audited by Ernst & Young LLP, independent auditors, as set forth in their
report included therein and incorporated by reference elsewhere herein, which is
based in part on the report of Arthur Andersen, independent auditors. Such
consolidated financial statements and supplemental consolidated financial
statements referred to above are incorporated herein by reference in reliance
upon such reports given on the authority of such firms as experts in accounting
and auditing.



                                       31
<PAGE>   34

                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS


ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

        The following table sets forth the expenses, other than underwriting
discounts and commissions, in connection with the offering of the securities
being registered. All the amounts shown are estimates except for the
registration fee.

<TABLE>
<S>                                                                  <C>
Securities and Exchange Commission Registration Fee...............   $83,400.00
Printing Fees.....................................................   $50,000.00
Legal Fees and Expenses...........................................  $100,000.00
Accounting Fees and Expenses......................................   $75,000.00
Miscellaneous.....................................................    $6,600.00
                                                                    -----------
     Total........................................................  $315,000.00
                                                                    ===========
</TABLE>

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS

        Under section 145 of the General Corporation Law of the State of
Delaware, the Registrant has broad powers to indemnify its directors and
officers against liabilities they may incur in such capacities, including
liabilities under the Securities Act of 1933, as amended (the "Securities Act").
The Registrant's Bylaws also provide for mandatory indemnification of its
directors and executive officers, and permissive indemnification of its
employees and agents, to the fullest extent permissible under Delaware law.

        The Registrant's Certificate of Incorporation provides that the
liability of its directors for monetary damages shall be eliminated to the
fullest extent permissible under Delaware law. Pursuant to Delaware law, this
includes elimination of liability for monetary damages for breach of the
directors' fiduciary duty of care to the Registrant and its stockholders. These
provisions do not eliminate the directors' duty of care and, in appropriate
circumstances, equitable remedies such as injunctive or other forms of
non-monetary relief will remain available under Delaware law. In addition, each
director will continue to be subject to liability for breach of the director's
duty of loyalty to the Registrant, for acts or omissions not in good faith or
involving intentional misconduct, for knowing violations of law, for any
transaction from which the director derived an improper personal benefit, and
for payment of dividends or approval of stock repurchases or redemptions that
are unlawful under Delaware law. The provision also does not affect a director's
responsibilities under any other laws, such as the federal securities laws or
state or federal environmental laws.

        The Registrant has entered into agreements with its directors and
certain of its executive officers that require the Registrant to indemnify such
persons against expenses, judgments, fines, settlements and other amounts
actually and reasonably incurred (including expenses of a derivative action) in
connection with any proceeding, whether actual or threatened, to which any such
person may be made a party by reason of the fact that such person is or was a
director or officer of the Registrant or any of its affiliated enterprises,
provided such person acted in good faith and in a manner such person reasonably
believed to be in or not opposed to the best interests of the Registrant and,
with respect to any criminal proceeding, had no reasonable cause to believe his
or her conduct was unlawful. The indemnification agreements also set forth
certain procedures that will apply in the event of a claim for indemnification
thereunder.

        The Registrant has obtained a policy of directors' and officers'
liability insurance that insures the Registrant's directors and officers against
the cost of defense, settlement or payment of a judgment under certain
circumstances.



                                       32
<PAGE>   35
ITEM 16.  EXHIBITS [TO BE REVISED]

<TABLE>
<CAPTION>
   Number      Document
   ------      --------
<S>            <C>
    1.1*       Form of Underwriting Agreement between the Company and the
               Representatives.

    3.1        Form of Registrant's Restated Certificate of Incorporation.(1)

    3.1.1      Form of Registrant's Certificate of Designation of the Series B
               Preferred Stock.(4)

    3.1.2      Form of Registrant's Certificate of Correction of Restated
               Certificate of Incorporation.(4)

    3.1.3      Form of Amendment to Registrant's Restated Certificate of
               Incorporation.(5)

    3.2        Form of Registrant's Amended and Restated Bylaws.(1)

    4.1        Reference is made to Exhibits 3.1 and 3.2.

    4.2        Specimen Common Stock certificate.(1)

    4.3.1      Rights Agreement, dated November 6, 1997, between SDL and Chase
               Mellon Shareholder Services, L.L.C., together with; Exhibit A,
               Form of Rights Certificate; Exhibit B, of Summary of Rights to
               Purchase Preferred Stock; and Exhibit C Form of Certificate of
               Designation of the Series B Preferred Stock.(2)

    4.3.2      First Amended and Restated Rights Agreement, dated February 11,
               1999, between SDL and Chase Mellon Shareholders Services, L.L.C.,
               a New Jersey limited liability company.(3)

    4.4        Form of Indenture.

    4.5*       Form of Preferred Stock Certificate.

    4.6*       Form of Warrant Agreement.

    4.7*       Form of Deposit Agreement.

    5.1        Opinion of Morrison & Foerster LLP as to the validity of the
               issuance of the securities.

   12.1        Calculation of Ratio of Earnings to Fixed Charges.

   23.1        Consent of Ernst & Young LLP, Independent Auditors.

   23.2        Consent of Arthur Andersen, Independent Auditors.

   23.3        Consent of Morrison & Foerster LLP (included in Exhibit 5.1).

   24.1        Power of attorney of certain signatories (included on the
               Signature Page).

   25.1*       Statement of Eligibility of Trustee on Form T-1.
</TABLE>

Notes regarding exhibits incorporated by reference

        (1)     Incorporated by reference to the identically numbered exhibit to
                SDL's Registration Statement on Form S-1 (File No. 33-87752),
                which became effective on March 15, 1995.

        (2)     Incorporated by reference to Exhibit 1 to SDL's Registration
                Statement on Form 8-A (File No. 000-25688), filed with the SEC
                on November 7, 1997.

        (3)     Incorporated by reference to Exhibit 1 to SDL's Registration
                Statement on Form 8-A/A filed with the SEC on March 19, 1999.

        (4)     Incorporated by reference to the identically numbered exhibit to
                SDL's Annual Report on Form 10-K/A for the fiscal year ended
                December 31, 1998.



                                       33
<PAGE>   36
        (5)     Incorporated by reference to the identically numbered exhibit to
                SDL's Quarterly Report on Form 10-Q for the quarter ended June
                30, 1999.


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

* To be filed by amendment or incorporated by reference in connection with the
offering of the applicable securities.


ITEM 17.  UNDERTAKINGS

        The undersigned Registrant hereby undertakes:

        (1) To file, during any period in which offers or sales are being made,
post-effective amendment to this registration statement:

                (i) To include any prospectus required by Section 10(a)(3) of
        the Securities Act of 1933;

               (ii) To reflect in the prospectus any facts or events arising
        after the effective date of the registration statement (or the most
        recent post-effective amendment thereof) which, individually or in the
        aggregate, represent a fundamental change in the information set forth
        in this registration statement; and

               (iii) To include any material information with respect to the
        plan of distribution not previously disclosed in this registration
        statement or any material change to such information in this
        registration statement;

               Provided, however, that subparagraphs (i) and (ii) do not apply
        if the information required to be included in a post-effective amendment
        by those paragraphs is contained in the periodic reports filed by the
        Registrant pursuant to Section 13 or Section 15(d) of the Securities
        Exchange Act of 1934, that are incorporated by reference in this
        registration statement.

        (2) That, for the purpose of determining any liability under the
Securities Act of 1933, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered herein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

        (3) To remove from registration by means of a post-effective amendment
any of the securities being registered which remain unsold at the termination of
the offering.

        The undersigned Registrant hereby further undertakes that, for the
purposes of determining any liability under the Securities Act of 1933, each
filing of the Registrant's annual reports pursuant to Section 13(a) or Section
15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing
of an employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in this
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

        The undersigned Registrant hereby further undertakes to deliver or cause
to be delivered with the prospectus, to each person to whom the prospectus is
sent or given, the latest annual report to security holders that is incorporated
by reference in the prospectus and furnished pursuant to and meeting the
requirements of Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act of
1934; and, where interim financial information required to be presented by
Article 3 of Regulation S-X is not set forth in the Prospectus, to deliver, or
cause to be delivered to each person to whom the prospectus is sent or given,
the latest quarterly report that is specifically incorporated by reference in
the prospectus to provide such interim financial information.

        The undersigned Registrant hereby further undertakes that:



                                       34
<PAGE>   37
        (1) For purposes of determining any liability under the Securities Act
of 1933, the information omitted from the form of prospectus filed as part of
this registration statement in reliance under Rule 430A and contained in a form
of prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4), or
497(h) under the Securities Act of 1933 shall be deemed to be part of this
registration statement as of the time it was declared effective.

        (2) For the purpose of determining any liability under the Securities
Act of 1933, each post-effective amendment that contains a form of prospectus
shall be deemed to be a new registration statement relating to the securities
offered therein, and the offering of such securities at that time shall be
deemed to be the initial bona fide offering thereof.

        The undersigned Registrant hereby further undertakes to file an
application for the purpose of determining the eligibility of the Trustee to act
under subsection (a) of Section 310 of the Trust Indenture Act in accordance
with the rules and regulations prescribed by the Commission under Section
305(b)(2) of the Act.

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described under Item 15 above, or
otherwise, the Registrant has been advised that in the opinion of the Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.



                                       35
<PAGE>   38
                                   SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in San Jose, California on August __, 1999.


                                       SDL, INC.

                                       By:  /s/ DONALD R. SCIFRES
                                            ------------------------------------
                                            Donald R. Scifres
                                            Chairman of the Board and
                                            Chief Executive Officer

        Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated. Each person whose signature appears below
hereby authorizes Donald R. Scifres and Michael L. Foster and each of them, as
Attorney-in-fact, to sign on his behalf individually and In each capacity stated
below, and to file, any amendments, including post-effective amendments, to this
registration statement.

<TABLE>
<CAPTION>
             SIGNATURE                              TITLE                      DATE
             ---------                              -----                      ----
<S>                                       <C>                             <C>
     /s/ DONALD R. SCIFRES                Chairman of the Board and       August 11, 1999
- -------------------------------------     Chief Executive Officer
         Donald R. Scifres                (Principal Executive
                                          Officer)

    /s/ MICHAEL L. FOSTER                 Chief Financial Officer         August 11, 1999
- -------------------------------------     and Treasurer (Principal
        Michael L. Foster                 Financial and Accounting
                                          Officer)

    /s/ KEITH B. GEESLIN                  Director                        August 11, 1999
- -------------------------------------
        Keith B. Geeslin


   /s/ ANTHONY B. HOLBROOK                Director                        August 11, 1999
- -------------------------------------
       Anthony B. Holbrook

   /s/ MARK B. MYERS                      Director                        August 11, 1999
- -------------------------------------
       Mark B. Myers

   /s/ FREDERIC N. SCHWETTMANN            Director                        August 11, 1999
- -------------------------------------
       Frederic N. Schwettmann
</TABLE>



                                       36
<PAGE>   39
                                        EXHIBIT INDEX

   Number     Document

    1.1*       Form of Underwriting Agreement between the Company and the
               Representatives.

    3.1        Form of Registrant's Restated Certificate of Incorporation.(1)

    3.1.1      Form of Registrant's Certificate of Designation of the Series B
               Preferred Stock.(4)

    3.1.2      Form of Registrant's Certificate of Correction of Restated
               Certificate of Incorporation.(4)

    3.1.3      Form of Amendment to Registrant's Restated Certificate of
               Incorporation.(5)

    3.2        Form of Registrant's Amended and Restated Bylaws.(1)

    4.1        Reference is made to Exhibits 3.1 and 3.2.

    4.2        Specimen Common Stock certificate.(1)

    4.3.1      Rights Agreement, dated November 6, 1997, between SDL and Chase
               Mellon Shareholder Services, L.L.C., together with; Exhibit A,
               Form of Rights Certificate; Exhibit B, of Summary of Rights to
               Purchase Preferred Stock; and Exhibit C Form of Certificate of
               Designation of the Series B Preferred Stock.(2)

    4.3.2      First Amended and Restated Rights Agreement, dated February 11,
               1999, between SDL and Chase Mellon Shareholders Services, L.L.C.,
               a New Jersey limited liability company.(3)

    4.4        Form of Indenture.

    4.5*       Form of Preferred Stock Certificate.

    4.6*       Form of Warrant Agreement.

    4.7*       Form of Deposit Agreement.

    5.1        Opinion of Morrison & Foerster LLP as to the validity of the
               issuance of the securities.

   12.1        Calculation of Ratio of Earnings to Fixed Charges.

   23.1        Consent of Ernst & Young LLP, Independent Auditors.

   23.2        Consent of Arthur Andersen, Independent Auditors.

   23.3        Consent of Morrison & Foerster LLP (included in Exhibit 5.1).

   24.1        Power of attorney of certain signatories (included on the
               Signature Page).

   25.1*       Statement of Eligibility of Trustee on Form T-1.

Notes regarding exhibits incorporated by reference

        (1)     Incorporated by reference to the identically numbered exhibit to
                SDL's Registration Statement on Form S-1 (File No. 33-87752),
                which became effective on March 15, 1995.

        (2)     Incorporated by reference to Exhibit 1 to SDL's Registration
                Statement on Form 8-A (File No. 000-25688), filed with the SEC
                on November 7, 1997.


<PAGE>   40
        (3)     Incorporated by reference to Exhibit 1 to SDL's Registration
                Statement on Form 8-A/A filed with the SEC on March 19, 1999.

        (4)     Incorporated by reference to the identically numbered exhibit to
                SDL's Annual Report on Form 10-K/A for the fiscal year ended
                December 31, 1998.

        (5)     Incorporated by reference to the identically numbered exhibit to
                SDL's Quarterly Report on Form 10-Q for the quarter ended June
                30, 1999.


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

* To be filed by amendment or incorporated by reference in connection with the
  offering of the applicable securities.

<PAGE>   1
                                                                     EXHIBIT 4.4


                                   SDL, INC.,

                                     ISSUER

                                       AND


- --------------------------------------------------------------------------------
                                     TRUSTEE






                                    INDENTURE

                          DATED AS OF _________________

                                 DEBT SECURITIES



<PAGE>   2
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                           PAGE
                                                                                           ----
<S>                                                                                        <C>
RECITALS OF THE ISSUER.......................................................................1

                                   ARTICLE ONE

DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION......................................1

   SECTION 101.     Definitions..............................................................1

   SECTION 102.     Compliance Certificates and Opinions.....................................8

   SECTION 103.     Form of Documents Delivered to Trustee...................................9

   SECTION 104.     Acts of Holders.........................................................10

   SECTION 105.     Notices, etc., to Trustee and Issuer....................................11

   SECTION 106.     Notice to Holders; Waiver...............................................11

   SECTION 107.     Effect of Headings and Table of Contents................................12

   SECTION 108.     Successors and Assigns..................................................12

   SECTION 109.     Separability Clause.....................................................12

   SECTION 110.     Benefits of Indenture...................................................12

   SECTION 111.     Governing Law...........................................................13

   SECTION 112.     Legal Holidays..........................................................13


                                   ARTICLE TWO

SECURITIES FORMS............................................................................13

   SECTION 201.     Forms of Securities.....................................................13

   SECTION 202.     Form of Trustee's Certificate of Authentication.........................14

   SECTION 203.     Securities Issuable in Global Form......................................14


                                  ARTICLE THREE

THE SECURITIES..............................................................................15

   SECTION 301.     Amount Unlimited; Issuable in Series....................................15

   SECTION 302.     Denominations...........................................................18

   SECTION 303.     Execution, Authentication, Delivery and Dating..........................18
</TABLE>




                                       i

<PAGE>   3
                                TABLE OF CONTENTS (CONT'D)

<TABLE>
<CAPTION>
                                                                                           PAGE
                                                                                           ----
<S>                                                                                        <C>
   SECTION 304.     Temporary Securities....................................................20

   SECTION 305.     Registration, Registration of Transfer and Exchange.....................23

   SECTION 306.     Mutilated, Destroyed, Lost and Stolen Securities........................26

   SECTION 307.     Payment of Interest -- Interest Rights Preserved........................27

   SECTION 308.     Persons Deemed Owners...................................................29

   SECTION 309.     Cancellation............................................................30

   SECTION 310.     Computation of Interest.................................................30


                                  ARTICLE FOUR

SATISFACTION AND DISCHARGE..................................................................30

   SECTION 401.     Satisfaction and Discharge of Indenture.................................30

   SECTION 402.     Application of Trust Funds..............................................32


                                  ARTICLE FIVE

REMEDIES....................................................................................32

   SECTION 501.     Events of Default.......................................................32

   SECTION 502.     Acceleration of Maturity; Rescission and Annulment......................34

   SECTION 503.     Collection of Indebtedness and Suits for Enforcement by Trustee.........35

   SECTION 504.     Trustee May File Proofs of Claim........................................35

   SECTION 506.     Trustee May Enforce Claims Without Possession of Securities of Coupons..36

   SECTION 506.     Application of Money Collected..........................................37

   SECTION 507.     Limitation on Suits.....................................................37

   SECTION 508.     Unconditional Right of Holders to Receive Principal, Premium, if
                    any, Interest and Additional Amount.....................................38

   SECTION 509.     Restoration of Rights and Remedies......................................38

   SECTION 510.     Rights and Remedies Cumulative..........................................38

   SECTION 511.     Delay or Omission Not Waiver............................................38

   SECTION 512.     Control by Holders of Securities........................................38

   SECTION 513.     Waiver of Past Defaults.................................................39
</TABLE>



                                       ii
<PAGE>   4
                                TABLE OF CONTENTS (CONT'D)

<TABLE>
<CAPTION>
                                                                                           PAGE
                                                                                           ----
<S>                                                                                        <C>
   SECTION 514.     Waiver of Usury, Stay or Extension Laws.................................39

   SECTION 515.     Undertaking for Costs...................................................39


                                   ARTICLE SIX

THE TRUSTEE.................................................................................40

   SECTION 601.     Notice of Defaults......................................................40

   SECTION 602.     Certain Rights of Trustee...............................................40

   SECTION 603.     Not Responsible for Recitals or Issuance of Securities..................42

   SECTION 604.     May Hold Securities.....................................................43

   SECTION 605.     Money Held in Trust.....................................................43

   SECTION 606.     Compensation and Reimbursement..........................................43

   SECTION 607.     Corporate Trustee Required; Eligibility; Conflicting Interests..........44

   SECTION 608.     Resignation and Removal; Appointment of Successor.......................44

   SECTION 609.     Acceptance of Appointment by Successor..................................45

   SECTION 610.     Merger, Conversion, Consolidation or Succession to Business.............46

   SECTION 611.     Appointment of Authentication Agent.....................................47


                                  ARTICLE SEVEN

HOLDERS' LISTS AND REPORTS BY TRUSTEE AND ISSUER............................................48

   SECTION 701.     Disclosure of Names and Addresses of Holders............................48

   SECTION 702.     Reports by Trustee......................................................49

   SECTION 703.     Reports by Issuer ......................................................49

   SECTION 704.     Issuer to Furnish to Trustee Names and Addresses of Holders.............49


                                  ARTICLE EIGHT

CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE............................................50

   SECTION 801.     Consolidation and Merger of Issuer and Sale, Lease and Conveyance
                    Permitted Subject to Certain Conditions.................................50

   SECTION 802.     Rights and Duties of Successor Person...................................50
</TABLE>



                                      iii

<PAGE>   5
                                TABLE OF CONTENTS (CONT'D)

<TABLE>
<CAPTION>
                                                                                           PAGE
                                                                                           ----
<S>                                                                                        <C>
   SECTION 803.     Officers' Certificate and Opinion of Counsel............................51


                                  ARTICLE NINE

SUPPLEMENTAL INDENTURES.....................................................................51

   SECTION 901.     Supplemental Indentures Without Consent of Holders......................51

   SECTION 902.     Supplemental Indentures with Consent of Holders.........................52

   SECTION 903.     Execution of Supplemental Indentures....................................54

   SECTION 904.     Effect of Supplemental Indentures.......................................54

   SECTION 905.     Conformity with Trust Indenture Act.....................................54

   SECTION 906.     Reference in Securities to Supplemental Indentures......................54


                                   ARTICLE TEN

COVENANTS...................................................................................54

   SECTION 1001.    Payment of Principal, Premium, if any, Interest and
                    Additional Amounts......................................................54

   SECTION 1002.    Maintenance of Office or Agency.........................................55

   SECTION 1003.    Money for Securities Payments to Be Held in Trust.......................56

   SECTION 1004.    Existence...............................................................58

   SECTION 1005.    Statement as to Compliance..............................................58

   SECTION 1006.    Maintenance of Properties...............................................58

   SECTION 1007.    Insurance...............................................................58

   SECTION 1008.    Payment of Taxes and Other Claims.......................................58

   SECTION 1009.    Additional Amounts......................................................58

   SECTION 1010.    Waiver of Certain Covenants.............................................59


                                 ARTICLE ELEVEN

REDEMPTION OF SECURITIES....................................................................60

   SECTION 1101.    Applicability of Article................................................60

   SECTION 1102.    Election to Redeem; Notice to Trustee...................................60
</TABLE>



                                       iv
<PAGE>   6
                                TABLE OF CONTENTS (CONT'D)

<TABLE>
<CAPTION>
                                                                                           PAGE
                                                                                           ----
<S>                                                                                        <C>
   SECTION 1103.    Selection by Trustee of Securities to Be Redeemed.......................60

   SECTION 1104.    Notice of Redemption....................................................60

   SECTION 1105.    Deposit of Redemption Price.............................................62

   SECTION 1106.    Securities Payable on Redemption Date...................................62

   SECTION 1107.    Securities Redeemed in Part.............................................63


                                 ARTICLE TWELVE

SINKING FUNDS...............................................................................63

   SECTION 1201.    Applicability of Article................................................63

   SECTION 1202.    Satisfaction of Sinking Fund Payments with Securities...................64

   SECTION 1203.    Redemption of Securities for Sinking Fund...............................64


                                ARTICLE THIRTEEN

REPAYMENT AT THE OPTION OF HOLDERS..........................................................64

   SECTION 1301.    Applicability of Article................................................64

   SECTION 1302.    Repayment of Securities.................................................65

   SECTION 1303.    Exercise of Option......................................................65

   SECTION 1304.    When Securities Presented for Recipient Become Due and Payable..........66

   SECTION 1305.    Securities Repaid in Part...............................................66


                                ARTICLE FOURTEEN

DEFEASANCE AND COVENANT DEFEASANCE..........................................................67

   SECTION 1401.    Applicability of Article; Issuer's Option to Effect Defeasance
                    or Covenant Defeasance .................................................67

   SECTION 1402.    Defeasance and Discharge................................................67

   SECTION 1403.    Covenant Defeasance.....................................................68

   SECTION 1404.    Conditions to Defeasance or Covenant Defeasance.........................68

   SECTION 1405.    Deposited Money and Government Obligations to Be Held in Trust;
                    Other Miscellaneous Provisions..........................................70
</TABLE>



                                       v
<PAGE>   7
                                TABLE OF CONTENTS (CONT'D)

<TABLE>
<CAPTION>
                                                                                           PAGE
                                                                                           ----
<S>                                                                                        <C>
                                 ARTICLE FIFTEEN

MEETINGS OF HOLDERS OF SECURITIES...........................................................71

   SECTION 1501.    Purposes for Which Meetings May Be Called...............................71

   SECTION 1502.    Call, Notice and Place of Meetings......................................71

   SECTION 1503.    Persons Entitled to Vote at Meetings....................................71

   SECTION 1504.    Quorum; Action..........................................................72

   SECTION 1505.    Determination of Voting Rights; Conduct and Adjournment of Meetings.....73

   SECTION 1506.    Counting Votes and Recording Action of Meeting..........................73


EXHIBIT A-1..................................................................................1

EXHIBIT A-2..................................................................................1
</TABLE>




                                       vi

<PAGE>   8
                                REFERENCE SHEET*

        Reference is made to the following provisions of the Trust Indenture Act
of 1939, as amended, which establish certain duties and responsibilities of the
Issuer, and the Trustee which may not be set forth in this Indenture:


<TABLE>
<CAPTION>
SECTION            SUBJECT                              SECTION       SUBJECT
- -------            -------                              -------       -------
<S>              <C>                                     <C>          <C>
310(b)           Disqualification of the Trustee         315(b)       Notice of default from the
                 for conflicting interest                             Trustee to Securityholders

311              Preferential collection of              315(c)       Duties of the Trustee in case
                 claims of the Trustee as                             of default
                 creditor of the Issuer

312(a)           Periodic filing of information          315(d)       Provisions relating to
                 by the Issuer with Trustee                           responsibility of the Trustee

312(b)           Access of Securityholders to            315(e)       Assessment of costs against
                 information                                          litigating Securityholders in
                                                                      certain circumstances

313(a)           Annual report of the Trustee to         316(a)       Directions and waivers by
                 Securityholders                                      Securityholders in certain
                                                                      circumstances

313(b)           Additional reports of the               316(b)       Prohibition of impairment of
                 Trustee to Securityholders                           right of Securityholders to
                                                                      payment

314(a)           Reports by the Issuer,                  316(c)       Right of the Issuer to set
                 including annual compliance                          record date for certain purposes
                 certificate

314(c)           Evidence of compliance with             317(a)       Special powers of the Trustee
                 conditions precedent

315(a)           Duties of the Trustee prior to          318(a)       Provisions of Trust Indenture
                 default                                              Act of 1939 to control in case
                                                                      of conflict
</TABLE>


- --------
* This reference sheet is not a part of the Indenture.

<PAGE>   9
                                                                     EXHIBIT 4.4



        INDENTURE, dated as of ___________________, between SDL, Inc., a
California corporation (hereinafter called the "Issuer"), having its principal
office at 80 Rose Orchard Way, San Jose, California 95134, and
________________________________, as Trustee (the "Trustee"), having a principal
place of business at ______________________________________ .


                             RECITALS OF THE ISSUER

        The Issuer deems it necessary to issue from time to time for lawful
purposes debt securities (hereinafter called the "Securities") evidencing its
unsecured indebtedness, and has duly authorized the execution and delivery of
this Indenture, to provide for the issuance from time to time of the Securities,
unlimited as to principal amount, to bear interest at the rates or formulas, to
mature at such times and to have such other provisions as shall be fixed as
hereinafter provided.

        This Indenture is subject to the provisions of the Trust Indenture Act
of 1939, as amended, that are deemed to be incorporated into this Indenture by
such Act, and shall, to the extent applicable, be governed by such provisions.

        All things necessary to make this Indenture a valid agreement of the
Issuer, in accordance with its terms, have been done.

        NOW, THEREFORE, THIS INDENTURE WITNESSETH:

        For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually covenanted and agreed, for the
equal and proportionate benefit of all Holders of the Securities, as follows:

ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

        SECTION 101. Definitions. For all purposes of this Indenture, except as
otherwise expressly provided or unless the context otherwise requires:

                (1) the terms defined in this Article have the meanings assigned
        to them in this Article, and include the plural as well as the singular;

                (2) all other terms used herein which are defined in the TIA,
        either directly or by reference therein, have the meanings assigned to
        them therein, and the terms "cash transaction" and "self-liquidating
        paper", as used in TIA Section 311, shall have the meanings assigned to
        them in the rules of the Commission adopted under the TIA;

                (3) all accounting terms not otherwise defined herein have the
        meanings assigned to them in accordance with GAAP; and



                                       1
<PAGE>   10
                (4) the words "herein", "hereof" and "hereunder" and other words
        of similar import refer to this Indenture as a whole and not to any
        particular Article, Section or other subdivision.

        Certain terms, used principally in Article Three, Article Five, Article
Six and Article Ten, are defined in those Articles.

        "Act", when used with respect to any Holder, has the meaning specified
in Section 104.

        "Additional Amounts" means any additional amounts which are required by
a Security or by or pursuant to a Board Resolution, under circumstances
specified therein, to be paid by the Issuer in respect of certain taxes imposed
on certain Holders and which are owing to such holders.

        "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For the purposes of this definition,
"control" when used with respect to any specified Person means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

        "Authenticating Agent" means any authenticating agent appointed by the
Trustee pursuant to Section 611.

        "Authorized Newspaper" means a newspaper, printed in the English
language or in an official language of the country of publication, customarily
published on each Business Day, whether or not published on Saturdays, Sundays
or holidays, and of general circulation in each place in connection with which
the term is used or in the financial community of each such place. Whenever
successive publications are required to be made in Authorized Newspapers, the
successive publications may be made in the same or in different Authorized
Newspapers in the same city meeting the foregoing requirements and in each case
on any Business Day.

        "Bearer Security" means any Security established pursuant to Section 201
which is payable to bearer.

        "Board" means the board of directors of the Issuer, the executive
committee or any committee of that board duly authorized to act hereunder.

        "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Issuer to have been duly adopted by
the Board and to be in full force and effect on the date of such certification,
and delivered to the Trustee.

        "Business Day", when used with respect to any Place of Payment or any
other particular location referred to in this Indenture or in the Securities,
means, unless otherwise specified with respect to any Securities pursuant to
Section 301, any day, other than a Saturday or Sunday, that is neither a legal
holiday nor a day on which banking institutions in that Place of Payment or
particular location are authorized or required by law, regulation or executive
order to close.



                                       2
<PAGE>   11
        "Capitalized Leases" means any lease of property by the Issuer or any
Subsidiary as lessee which is reflected on the Issuer's consolidated balance
sheet as a capitalized lease, or which should be so reflected, in accordance
with GAAP.

        "CEDEL" means Centrale de Livraison de Valeurs Mobilieres, S.A., or its
successor.

        "Commission" means the Securities and Exchange Commission, as from time
to time constituted, created under the Securities Exchange Act of 1934, or, if
at any time after execution of this instrument such Commission is not existing
and performing the duties now assigned to it under the Trust Indenture Act, then
the body performing such duties on such date.

        "Common Depository" shall have the meaning specified in Section 304.

        "Conversion Event" means the cessation of use of (i) a Foreign Currency
either by the government of the country which issued such currency or for the
settlement of transactions by a central bank or other public institution of or
within the international banking community, (ii) the ECU either within the
European Monetary System or for the settlement of transactions by public
institutions of or within the European Community or (iii) any currency unit (or
composite currency) other than the ECU for the purposes for which it was
established.

        "Corporate Trust Office" means the office of the Trustee at which, at
any particular time, its corporate trust business shall be principally
administered, which office at the date hereof is located at
_______________________________________, Attention: __________________.

        "Coupon" means any interest coupon appertaining to a Bearer Security.

        "Debt" of the Issuer or any Subsidiary means, without duplication, any
indebtedness of the Issuer or any Subsidiary, in respect of (i) borrowed money,
(ii) evidenced by bonds, notes, debentures or similar instruments, (iii)
indebtedness secured by any mortgage, pledge, lien, charge, encumbrance or any
security interest existing on property owned by the Issuer or any Subsidiary,
(iv) letters of credit or amounts representing the balance deferred and unpaid
of the purchase price of any property except any such balance that constitutes
an accrued expense or trade payable or (v) Capitalized Leases, and also
includes, to the extent not otherwise included, any obligation by the Issuer or
any Subsidiary to be liable for, or to pay, as obligor, guarantor or otherwise
(other than for purposes of collection in the ordinary course of business),
indebtedness of another person (other than the Issuer or any Subsidiary) in
respect of clauses (i) through (v) above.

        "Defaulted Interest" has the meaning specified in Section 307.

        "Dollar" or "$" means a dollar or other equivalent unit in such coin or
currency of the United States of America as at the time shall be legal tender
for the payment of public and private debts.

        "DTC" means The Depository Trust Company, or any successor thereto.



                                       3
<PAGE>   12

        "ECU" means the European Currency Unit as defined and revised from time
to time by the Council of the European Community.

        "Euroclear" means Morgan Guaranty Trust Company of New York, Brussels
Office, or its successor as operator of the Euroclear System.

        "European Community" means the European Economic Community.

        "European Monetary System" means the European Monetary System
established by the Resolution of December 5, 1978 of the Council of the European
Community.

        "Event of Default" has the meaning specified in Article Five.

        "Foreign Currency" means any currency, currency unit or composite
currency, including, without limitation, the ECU, issued by the government of
one or more countries other than the United States of America or by any
recognized confederation or association of such governments.

        "GAAP" means generally accepted accounting principles as used in the
United States applied on a consistent basis.

        "Government Obligations" means securities which are (i) direct
obligations of the United States of America or the government which issued the
Foreign Currency in which the Securities of a particular series are payable, for
the payment of which its full faith and credit is pledged or (ii) obligations of
a Person controlled or supervised by and acting as an agency or instrumentality
of the United States of America or such government which issued the Foreign
Currency in which the Securities of such series are payable, the payment of
which is unconditionally guaranteed as a full faith and credit obligation by the
United States of America or such other government, which, in either case, are
not callable or redeemable at the option of the issuer thereof, and shall also
include a depository receipt issued by a bank or trust company as custodian with
respect to any such Government Obligation or a specific payment of interest on
or principal of any such Government Obligation held by such custodian for the
account of the holder of a depository receipt, provided that (except as required
by law) such custodian is not authorized to make any deduction from the amount
payable to the holder of such depository receipt from any amount received by the
custodian in respect of the Government Obligation or the specific payment of
interest on or principal of the Government Obligation evidenced by such
depository receipt.

        "Holder" means, in the case of a Registered Security, the Person in
whose name a Security is registered in the Security Register and, in the case of
a Bearer Security, the bearer thereof and, when used with respect to any coupon,
shall mean the bearer thereof.

        "Indenture" means this instrument as originally executed or as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
and shall include the terms of particular series of Securities established as
contemplated by Section 301; provided, however, that, if at any time more than
one Person is acting as Trustee under this instrument, "Indenture" shall mean,
with respect to any one or more series of Securities for which any such Person
is Trustee, this



                                       4
<PAGE>   13
instrument as originally executed or as it may from time to time be supplemented
or amended and shall include the terms of the or those particular series of
Securities for which such Person is Trustee established as contemplated by
Section 301, exclusive, however, of any provisions or terms which relate solely
to other series of Securities for which such Person is not Trustee.

        "Indexed Security" means a Security the terms of which provide that the
principal amount thereof payable at Stated Maturity may be more or less than the
principal face amount thereof at original issuance, as determined by reference
to a particular index or other measure specified in a supplemental indenture
relating to such Security.

        "Interest", when used with respect to an Original Issue Discount
Security which by its terms bears interest only after Maturity, shall mean
interest payable after Maturity, and, when used with respect to a Security which
provides for the payment of Additional Amounts pursuant to Section 1009,
includes such Additional Amounts.

        "Interest Payment Date", when used with respect to any Security, means
the Stated Maturity of an installment of interest on such Security.

        "Issuer" means the Person named as the "Issuer" in the first paragraph
of this Indenture until a successor shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter "Issuer" shall mean such
successor.

        "Issuer Request" and "Issuer Order" mean, respectively, a written
request or order signed on behalf of the Issuer by its President or a Vice
President, and by the Treasurer, an Assistant Treasurer, the Secretary or an
Assistant Secretary of the Issuer, and delivered to the Trustee.

        "Maturity", when used with respect to any Security, means the date on
which the principal of such Security or an installment of principal becomes due
and payable as therein or herein provided, whether at the Stated Maturity or by
declaration of acceleration, notice of redemption, notice of option to elect
repayment or otherwise.

        "Officers' Certificate" means a certificate signed by the President or a
Vice President of the Issuer and by the Treasurer, an Assistant Treasurer, the
Secretary or an Assistant Secretary of the Issuer, and delivered to the Trustee.

        "Opinion of Counsel" means a written opinion of counsel, who may, if
permitted by the TIA, be counsel for the Issuer or who may be an employee of or
other counsel for the Issuer.

        "Original Issue Discount Security" means any Security which provides for
an amount less than the principal amount thereof to be due and payable upon a
declaration of acceleration of the Maturity thereof pursuant to Section 502.

        "Outstanding", when used with respect to Securities, means, as of the
date of determination, all Securities theretofore authenticated and delivered
under this Indenture, except:

                (i) Securities theretofore canceled by the Trustee or delivered
        to the Trustee for cancellation;



                                       5
<PAGE>   14

                (ii) Securities, or portions thereof, for whose payment or
        redemption or repayment at the option of the Holder money in the
        necessary amount has been theretofore deposited with the Trustee or any
        Paying Agent (other than the Issuer) in trust for the Holders of such
        Securities and any coupons appertaining thereto, provided that, if such
        Securities are to be redeemed, notice of such redemption has been duly
        given pursuant to this Indenture or provision therefor satisfactory to
        the Trustee has been made;

                (iii) Securities, except to the extent provided in Sections 1402
        and 1403, with respect to which the Issuer has effected defeasance as
        provided in Article Fourteen; and

                (iv) Securities which have been paid pursuant to Section 306 or
        in exchange for or in lieu of which other Securities have been
        authenticated and delivered pursuant to this Indenture, other than any
        such Securities in respect of which there shall have been presented to
        the Trustee proof satisfactory to it that such Securities are held by a
        bona fide purchaser in whose hands such Securities are valid obligations
        of the Issuer;

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder or are present at
a meeting of Holders for quorum purposes, and for the purpose of making the
calculations required by TIA Section 313, (i) the principal amount of an
Original Issue Discount Security that may be counted in making such
determination or calculation and that shall be deemed to be Outstanding for such
purpose shall be equal to the amount of principal thereof that would be (or
shall have been declared to be) due and payable, at the time of such
determination, upon a declaration of acceleration of the maturity thereof
pursuant to Section 502, (ii) the principal amount of any Security denominated
in a Foreign Currency that may be counted in making such determination or
calculation and that shall be deemed Outstanding for such purpose shall be equal
to the Dollar equivalent, determined pursuant to Section 301 as of the date such
Security is originally issued by the Issuer, of the principal amount (or, in the
case of an Original Issue Discount Security, the Dollar equivalent as of such
date of original issuance of the amount determined as provided in clause (i)
above) of such Security, (iii) the principal amount of any Indexed Security that
may be counted in making such determination or calculation and that shall be
deemed outstanding for such purpose shall be equal to the principal face amount
of such indexed Security at original issuance, unless otherwise provided with
respect to such Security pursuant to Section 301, and (iv) Securities owned by
the Issuer or any other obligor upon the Securities or any Affiliate of the
Issuer or of such other obligor shall be disregarded and deemed not to be
Outstanding, except that, in determining whether the Trustee shall be protected
in making such calculation or in relying upon any such request, demand,
authorization, direction, notice, consent or waiver, only Securities which the
Trustee knows to be so owned shall be so disregarded.

        "Paying Agent" means any Person authorized by the Issuer to pay the
principal of (and premium, if any) or interest on any securities or coupons on
behalf of the Issuer.

        "Person" means any individual, corporation, partnership, joint venture,
association, joint-stock company, trust, unincorporated organization or
government or any agency or political subdivision thereof.



                                       6
<PAGE>   15

        "Place of Payment", when used with respect to the Securities of any
series, means the place or places where the principal of (and premium, if any)
and interest on such Securities are payable as specified as contemplated by
Sections 301 and 1002.

        "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security or a Security to which a
mutilated, destroyed, lost or stolen coupon appertains shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security or
the Security to which the mutilated, destroyed, lost or stolen coupon
appertains.

        "Redemption Date", when used with respect to any Security to be
redeemed, in whole or in part, means the date fixed for such redemption by or
pursuant to this Indenture.

        "Redemption Price", when used with respect to any Security to be
redeemed, means the price at which it is to be redeemed pursuant to this
Indenture.

        "Registered Security" shall mean any Security established pursuant to
Section 201 which is registered in the Security Register.

        "Regular Record Date" for the interest payable on any Interest Payment
Date on the Registered Securities of any series means the date specified for
that purpose as contemplated by Section 301, whether or not a Business Day.

        "Repayment Date" means, when used with respect to any Security to be
repaid at the option of the Holder, the date fixed for such repayment by or
pursuant to this Indenture.

        "Responsible Officer", when used with respect to the Trustee, means any
trust officer in its Corporate Trust Office or a successor group or any other
officer of the Trustee customarily performing functions similar to those
performed by any of the above designated officers with responsibility for
matters related to this Indenture.

        "Security" has the meaning stated in the first recital of this Indenture
and, more particularly, means any Security or Securities authenticated and
delivered under this Indenture; provided, however, that, if at any time there is
more than one Person acting as Trustee under this Indenture, "Securities" with
respect to the Indenture as to which such Person is Trustee shall have the
meaning stated in the first recital of this Indenture and shall more
particularly mean Securities authenticated and delivered by such Trustee (or its
predecessor as such) under this Indenture, exclusive, however, of Securities of
any series as to which such Person is not Trustee.

        "Security Register" and "Security Registrar" have the respective
meanings specified in Section 305.

        "Significant Subsidiary" means any Subsidiary which is a "significant
subsidiary" (as defined in Article I, Rule 1-02 of Regulation S-X, promulgated
under the Securities Act of 1933, as amended) of the Issuer.



                                       7
<PAGE>   16

        "Special Record Date" for the payment of any Defaulted Interest on the
Registered Securities of any series means a date fixed by the Trustee pursuant
to Section 307.

        "Stated Maturity", when used with respect to any Security or any
installment of principal thereof or interest thereon, means the date specified
in such Security or a coupon representing such installment of interest as the
fixed date on which the principal of such Security or such installment of
principal or interest is due and payable.

        "Subsidiary" means a corporation, partnership or limited liability
company, a majority of the outstanding voting stock, partnership interests or
membership interests, as the case may be, of which is owned or controlled,
directly or indirectly, by the Issuer or by one or more other Subsidiaries of
the Issuer. For the purposes of this definition, "voting stock" means stock
having voting power for the election of directors, whether at all times or only
so long as no senior class of stock has such voting power by reason of any
contingency.

        "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939, as
amended and as in force at the date as of which this Indenture was executed,
except as provided in Section 905.

        "Trustee" means the Person named as the "Trustee" in the first paragraph
of this Indenture until a successor Trustee shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Trustee" shall mean
or include each Person who is then a Trustee hereunder; provided, however, that
if at any time there is more than one such Person, "Trustee" as used with
respect to the Securities of any series shall mean only the Trustee with respect
to Securities of that series.

        "United States" means, unless otherwise specified with respect to any
Securities pursuant to Section 301, the United States of America (including the
states and the District of Columbia), its territories, its possessions and other
areas subject to its jurisdiction.

        "United States person" means, unless otherwise specified with respect to
any Securities pursuant to Section 301, an individual who is a citizen or
resident of the United States, a corporation, partnership or other entity
created organized in or under the laws of the United States or an estate or
trust the income of which is subject to United States federal income taxation
regardless of its source.

        "Yield to Maturity" means the yield to maturity, computed at the time of
issuance of a Security (or, if applicable, at the most recent redetermination of
interest on such Security) and as set forth in such Security in accordance with
generally accepted United States bond yield computation principles.

        SECTION 102. Compliance Certificates and Opinions. Upon any application
or request by the Issuer to the Trustee to take any action under any provision
of this Indenture, the Issuer shall furnish to the Trustee an Officers'
Certificate stating that all conditions precedent, if any, provided for in this
Indenture relating to the proposed action have been complied with and an Opinion
of Counsel stating that in the opinion of such counsel all such conditions
precedent, if any, have been complied with, except that in the case of any such
application or request as to



                                       8
<PAGE>   17
which the furnishing of such documents is specifically required by any provision
of this Indenture relating to such particular application or request, no
additional certificate or opinion need be furnished.

        Every certificate or opinion with respect to compliance with a condition
or covenant provided for in this Indenture (including certificates delivered
pursuant to Section 1005) shall include:

                (1) a statement that each individual signing such certificate or
        opinion has read such condition or covenant and the definitions herein
        relating thereto;

                (2) a brief statement as to the nature and scope of the
        examination or investigation upon which the statements or opinions
        contained in such certificate or opinion are based;

                (3) a statement that, in the opinion of each such individual, he
        has made such examination or investigation as is necessary to enable him
        to express an informed opinion as to whether or not such condition or
        covenant has been complied with; and

                (4) a statement as to whether, in the opinion of each such
        individual, such condition or covenant has been complied with.

        SECTION 103. Form of Documents Delivered to Trustee. In any case where
several matters are required to be certified by or covered by an opinion of any
specified Person, it is not necessary that all such matters be certified by, or
covered by the opinion of, only one such Person, or that they be so certified or
covered by only one document, but one such Person may certify or give an opinion
as to some matters and one or more other such Persons as to other matters, and
any such Person may certify or give an opinion as to such matters in one or
several documents.

        Any certificate or opinion of an officer of the Issuer may be based,
insofar as it relates to legal matters, upon an Opinion of Counsel, or a
certificate or representations by counsel, unless such officer knows, or in the
exercise of reasonable care should know, that the opinion, certificate or
representations with respect to the matters upon which his certificate or
opinion is based are erroneous. Any such Opinion of Counsel or certificate or
representations may be based, insofar as it relates to factual matters upon a
certificate or opinion of, or representations by, an officer or officers of the
Issuer stating that the information as to such factual matters is in the
possession of the Issuer, unless such counsel knows that the certificate or
opinion or representations as to such matters are erroneous.

        Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.



                                       9
<PAGE>   18

        SECTION 104. Acts of Holders.

        (a) Any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given or taken by
Holders of the Outstanding Securities of all series or one or more series, as
the case may be, may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by agents duly
appointed in writing. If Securities of a series are issuable as Bearer
Securities, any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given or taken by
Holders of Securities of such series may, alternatively, be embodied in and
evidenced by the record of Holders of Securities of such series voting in favor
thereof, either in person or by proxies duly appointed in writing, at any
meeting of Holders of Securities of such series duly called and held in
accordance with the provisions of Article Fifteen, or a combination of such
instruments and any such record. Except as herein otherwise expressly provided,
such action shall become effective when such instrument or instruments or record
or both are delivered to the Trustee and, where it is hereby expressly required,
to the Issuer. Such instrument or instruments and any such record (and the
action embodied therein and evidenced thereby) are herein sometimes referred to
as the "Act" of the Holders signing such instrument or instruments or so voting
at any such meeting. Proof of execution of any such instrument or of a writing
appointing any such agent, or of the holding by any Person of a Security, shall
be sufficient for any purpose of this Indenture and conclusive in favor of the
Trustee and the Issuer and any agent of the Trustee or the Issuer, if made in
the manner provided in this Section. The record of any meeting of Holders of
Securities shall be proved in the manner provided in Section 1506;

        (b) The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof. Where such
execution is by a signer acting in a capacity other than his individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his authority. The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may so be proved in
any other reasonable manner which the Trustee deems sufficient;

        (c) The ownership of Registered Securities shall be proved by the
Security Register;

        (d) The ownership of Bearer Securities may be proved by the production
of such Bearer Securities or by a certificate executed, as depository, by any
trust company, bank or other depository, wherever situated, if such certificate
shall be deemed by the Trustee to be satisfactory, showing that at the date
therein mentioned such Person had on deposit with such depository, or exhibited
to it, the Bearer Securities therein described; or such facts may be proved by
the certificate or affidavit of the Person holding such Bearer Securities, if
such certificate or affidavit is deemed by the Trustee to be satisfactory. The
Trustee and the Issuer may assume that such ownership of any Bearer Security
continues until (1) another certificate or affidavit bearing a later date issued
in respect of the same Bearer Security is produced, or (2) such Bearer Security
is produced to the Trustee by some other Person, or (3) such Bearer Security is
surrendered in exchange for a Registered Security, or (4) such Bearer Security
is no longer Outstanding. The



                                       10
<PAGE>   19

ownership of Bearer Securities may also be proved in any other manner which the
Trustee deems sufficient;

        (e) If the Issuer shall solicit from the Holders of Registered
Securities any request, demand, authorization, direction, notice, consent,
waiver or other Act, the Issuer may, at its option, in or pursuant to a Board
Resolution, fix in advance a record date for the determination of Holders
entitled to give such request, demand, authorization, direction, notice,
consent, waiver or other Act, but the Issuer shall have no obligation to do so.
Notwithstanding TIA Section 316(c), such record date shall be the record date
specified in or pursuant to such Board Resolution, which shall be a date not
earlier than the date 30 days prior to the first solicitation of Holders
generally in connection therewith and not later than the date such solicitation
is completed. If such a record date is fixed, such request, demand,
authorization, direction, notice, consent, waiver or other Act may be given
before or after such record date, but only the Holders of record at the close of
business on such record date shall be deemed to be Holders for the purposes of
determining whether Holders of the requisite proportion of Outstanding
Securities have authorized or agreed or consented to such request, demand,
authorization, direction, notice, consent, waiver or other Act, and for that
purpose the Outstanding Securities shall be computed as of such record date;
provided that no such authorization, agreement or consent by the Holders on such
record date shall be deemed effective unless it shall become effective pursuant
to the provisions of this Indenture not later than eleven months after the
record date;

        (f) Any request, demand, authorization, direction, notice, consent,
waiver or other Act of the Holder of any Security shall bind every future Holder
of the same Security and the Holder of every security issued upon the
registration of transfer thereof or in exchange therefor or in lieu thereof in
respect of anything done, omitted or suffered to be done by the Trustee, any
Security Registrar, any Paying Agent, any Authenticating Agent or the Issuer in
reliance thereon, whether or not notation of such action is made upon such
Security.

        SECTION 105. Notices, etc., to Trustee and Issuer. Any request, demand,
authorization, direction, notice, consent, waiver or Act of Holders or other
document provided or permitted by this Indenture to be made upon, given or
furnished to, or filed with:

                (1) the Trustee by any Holder or by the Issuer shall be
        sufficient for every purpose hereunder if made, given, furnished or
        filed in writing to or with the Trustee at its Corporate Trust Office
        and specifically referencing this Indenture, or

                (2) the Issuer by the Trustee or by any Holder shall be
        sufficient for every purpose hereunder (unless otherwise herein
        expressly provided) if in writing and mailed, first class postage
        prepaid, to the Issuer addressed to it at the address of its principal
        office specified in the first paragraph of this Indenture or at any
        other address previously furnished in writing to the Trustee by the
        Issuer.

        SECTION 106. Notice to Holders; Waiver. Where this Indenture provides
for notice of any event to Holders of Registered Securities by the Issuer or the
Trustee, such notice shall be sufficiently given (unless otherwise herein
expressly provided) if in writing and mailed, first class postage prepaid, to
each such Holder affected by such event, at his address as it appears in



                                       11
<PAGE>   20
the Security Register, not later than the latest date, and not earlier than the
earliest date, prescribed for the giving of such notice. In any case where
notice to Holders of Registered Securities is given by mail, neither the failure
to mail such notice, nor any defect in any notice so mailed, to any particular
Holder shall affect the sufficiency of such notice with respect to other Holders
of Registered Securities or the sufficiency of any notice to Holders of Bearer
Securities given as provided herein. Any notice mailed to a Registered Holder in
the manner herein prescribed shall be conclusively deemed to have been received
by such Holder, whether or not such Holder actually receives such notice.

        Except as otherwise expressly provided herein or otherwise specified
with respect to any Securities pursuant to Section 301, where this Indenture
provides for notice to Holders of Bearer Securities of any event, such notice
shall be sufficiently given if published in an Authorized Newspaper in The City
of New York and in such other city or cities as may be specified in such
Securities on a Business Day, such publication to be not later than the latest
date, and not earlier than the earliest date, prescribed herein or in such
Securities for the giving of such notice. Any such notice shall be deemed to
have been given on the date of such publication or, if published more than once,
on the date of the first such publication.

        Any request, demand, authorization, direction, notice, consent or waiver
required or permitted under the Indenture shall be in the English language,
except that any published notice may be in an official language of the country
of publication.

        Where this Indenture provides for notice in any manner, such notice may
be waived in writing by the Person entitled to receive such notice, either
before or after the event, and such waiver shall be the equivalent of such
notice. Waivers of notice by Holders shall be filed with the Trustee.

        SECTION 107. Effect of Headings and Table of Contents. The Article and
Section headings herein and the Table of Contents are for convenience only and
shall not affect the construction hereof.

        SECTION 108. Successors and Assigns. All covenants and agreements in
this Indenture by the Issuer shall bind their successors and assigns, whether so
expressed or not.

        SECTION 109. Separability Clause. In case any provision in this
Indenture or in any Security or Coupon shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

        SECTION 110. Benefits of Indenture. Nothing in this Indenture or in the
Securities or Coupons, express or implied, shall give to any Person, other than
the parties hereto, any Security Registrar, any Paying Agent, any Authenticating
Agent and their successors hereunder and the Holders any benefit or any legal or
equitable right, remedy or claim under this Indenture.

        SECTION 111. Governing Law. This Indenture and the Securities and
Coupons shall be governed by and construed in accordance with the law of the
State of New York. This Indenture is subject to the provisions of the TIA that
are required to be part of this Indenture and shall, to



                                       12
<PAGE>   21
the extent applicable, be governed by such provisions, which are incorporated
herein by reference.

        SECTION 112. Legal Holidays. In any case where any Interest Payment
Date, Redemption Date, Repayment Date, sinking fund payment date, Stated
Maturity or Maturity of any Security shall not be a Business Day at any Place of
Payment, then (notwithstanding any other provision of this Indenture or any
Security or coupon other than a provision in the Securities of any series which
specifically states that such provision shall apply in lieu hereof), payment of
interest or any Additional Amounts or principal (and premium, if any) or sinking
fund payment need not be made at such Place of Payment on such date, but may be
made on the next succeeding Business Day at such Place of Payment with the same
force and effect as if made on the Interest Payment Date, Redemption Date,
Repayment Date or sinking fund payment date, or at the Stated Maturity or
Maturity, provided that interest shall not accrue on the amount so payable for
the period from and after such Interest Payment Date, Redemption Date, Repayment
Date, sinking fund payment date, Stated Maturity or Maturity, as the case may
be, to the date of payment.

                                  ARTICLE TWO

                                SECURITIES FORMS

        SECTION 201. Forms of Securities. The Registered Securities, if any, of
each series and the Bearer Securities and related Coupons, if any, of each
series shall be in substantially the form as shall be established in an
indenture supplemental hereto or approved from time to time by or pursuant to a
Board Resolution in accordance with Section 301, shall have such appropriate
insertions, omissions, substitutions and other variations as are required or
permitted by this Indenture or any indenture supplemental hereto, and may have
such letters, numbers or other marks of identification or designation and such
legends or endorsements placed thereon as the Issuer may deem appropriate and as
are not inconsistent with the provisions of this Indenture, or as may be
required to comply with any law or with any rule or regulation made pursuant
thereto or with any rule or regulation of any stock exchange on which the
Securities may be listed, or to conform to usage.

        Unless otherwise specified as contemplated by Section 301, Bearer
Securities shall have interest Coupons attached.

        The definitive Securities (and Coupons, if any) shall be printed,
lithographed or engraved or produced by any combination of these methods on a
steel engraved border or steel engraved borders or may be produced in any other
manner, all as determined by the officers of the Issuer executing such
Securities (or Coupons), as evidenced by their execution of such Securities or
coupons.

        SECTION 202. Form of Trustee's Certificate of Authentication. Subject to
Section 611, the Trustee's certificate of authentication shall be in
substantially the following form:



                                       13
<PAGE>   22

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

       _______________________________

       _______________________________,
       as Trustee
       By ____________________________
       Authorized Officer

        SECTION 203. Securities Issuable in Global Form. If Securities of a
series are issuable in global form, as specified in and as contemplated by
Section 301, then, notwithstanding clause (8) of Section 301 and the provisions
of Section 302, any such Security shall represent such of the Outstanding
Securities of such series as shall be specified therein and may provide that it
shall represent the aggregate amount of Outstanding Securities of such series
from time to time endorsed thereon and that the aggregate amount of Outstanding
Securities of such series represented thereby may from time to time be increased
or decreased to reflect exchanges. Any endorsement of a Security in global form
to reflect the amount, or any increase or decrease in the amount, of Outstanding
Securities represented thereby shall be made by the Trustee in such manner and
upon instructions given by such Person or Persons as shall be specified therein
or in the Issuer Order to be delivered to the Trustee pursuant to Section 303 or
304. Subject to the provisions of Section 303 and, if applicable, Section 304,
the Trustee shall deliver and redeliver any Security in permanent global form in
the manner and upon instructions given by the Person or Persons specified
therein or in the applicable Issuer Order. If an Issuer Order pursuant to
Section 303 or 304 has been, or simultaneously is, delivered, any instructions
by the Issuer with respect to endorsement or delivery or redelivery of a
Security in global form shall be in writing but need not comply with Section 102
and need not be accompanied by an Opinion of Counsel.

        The provisions of the last sentence of Section 303 shall apply to any
Security represented by a Security in global form if such Security was never
issued and sold by the Issuer and the Issuer delivers to the Trustee the
Security in global form together with written instructions (which need not
comply with Section 102 and need not be accompanied by an Opinion of Counsel)
with regard to the reduction in the principal amount of Securities represented
thereby, together with the written statement contemplated by the last sentence
of Section 303.

        Notwithstanding the provisions of Section 307, unless otherwise
specified as contemplated by Section 301, payment of principal of and any
premium and interest on any Security in permanent global form shall be made to
the Person or Persons specified therein.

        Notwithstanding the provisions of Section 308 and except as provided in
the preceding paragraph, the Issuer, the Trustee and any agent of the Issuer and
the Trustee shall treat as the Holder of such principal amount of Outstanding
Securities represented by a permanent global Security (i) in the case of a
permanent global Security in registered form, the Holder of such permanent
global Security in registered form or (ii) in the case of a permanent global
Security in bearer form, Euroclear or CEDEL.



                                       14
<PAGE>   23
                                 ARTICLE THREE

                                 THE SECURITIES

        SECTION 301. Amount Unlimited; Issuable in Series. The aggregate
principal amount of Securities which may be authenticated and delivered under
this Indenture is unlimited.

        The Securities may be issued in one or more series. There shall be
established in one or more Board Resolutions or pursuant to authority granted by
one or more Board Resolutions and, subject to Section 303, set forth, or
determined in the manner provided, in an Officers' Certificate, or established
in one or more indentures supplemental hereto, prior to the issuance of
Securities of any series, any or all of the following, as applicable:

                (1) the title of the Securities of the series (which shall
        distinguish the Securities of such series from all other series of
        Securities);

                (2) any limit upon the aggregate principal amount of the
        Securities of the series that may be authenticated and delivered under
        this Indenture (except for Securities authenticated and delivered upon
        registration of transfer of, or in exchange for, or in lieu of, other
        Securities of the series pursuant to Section 304, 305, 306, 906, 1107 or
        1305);

                (3) the date or dates, or the method by which such date or dates
        will be determined, on which the principal of the Securities of the
        series shall be payable;

                (4) the rate or rates at which the Securities of the series
        shall bear interest, if any, or the method by which such rate or rates
        shall be determined, the date or dates from which such interest shall
        accrue or the method by which such date or dates shall be determined,
        the Interest Payment Dates on which such interest will be payable and
        the Regular Record Date, if any, for the interest payable on any
        Registered Security on any Interest Payment Date, or the method by which
        such date shall be determined, and the basis upon which interest shall
        be calculated if other than that of a 360-day year of twelve 30-day
        months;

                (5) the place or places, if any, other than or in addition to
        Boston, Massachusetts, where (i) the principal of (and premium, if any),
        interest, if any, on, and Additional Amounts, if any, payable in respect
        of, Securities of the series shall be payable, (ii) any Registered
        Securities of the series may be surrendered for registration of
        transfer, exchange or conversion and (iii) notices or demands to or upon
        the Issuer in respect of the Securities of the series and this Indenture
        may be served;

                (6) the period or periods within which, or the date or dates on
        which, the price or prices at which, the currency or currencies,
        currency unit or units or composite currency or currencies in which, and
        other terms and conditions upon which Securities of the series may be
        redeemed, in whole or in part, at the option of the Issuer, if the
        Issuer is to have the option;



                                       15
<PAGE>   24

                (7) the obligation, if any, of the Issuer to redeem, repay or
        purchase Securities of the series, pursuant to any sinking fund or
        analogous provision or at the option of a Holder thereof upon the
        occurrence of specified circumstances or otherwise, and the period or
        periods within which or the date or dates on which, the price or prices
        at which, the currency or currencies, currency unit or units or
        composite currency or currencies in which, and other terms and
        conditions upon which Securities of the series shall be redeemed, repaid
        or purchased, in whole or in part, pursuant to such obligation and any
        provisions in modification of, in addition to or in lieu of any of the
        provisions of Articles Eleven, Twelve or Thirteen;

                (8) if other than denominations of $1,000 and any integral
        multiple thereof, the denominations in which any Registered Securities
        of the series shall be issuable and, if other than the denomination of
        $1,000, the denomination or denominations in which any Bearer Securities
        of the series shall be issuable;

                (9) if other than the Trustee, the identity of each Security
        Registrar and/or Paying Agent for the series;

                (10) the percentage of the principal amount at which Securities
        of such series will be issued and, if other than the principal amount
        thereof, the portion of the principal amount of Securities of the series
        that shall be payable upon declaration of acceleration of the Maturity
        thereof pursuant to Section 502 or, if applicable, the portion of the
        principal amount of Securities of the series that is convertible in
        accordance with the provisions of this Indenture, or the method by which
        such portion shall be determined;

                (11) if other than Dollars, the Foreign Currency or Currencies
        in which payment of the principal of (and premium, if any), interest, if
        any, on, and Additional Amounts, if any, on the Securities of the series
        shall be payable or in which the Securities of the series shall be
        denominated;

                (12) whether the amount of payments of principal of (and
        premium, if any) or interest, if any, on the Securities of the series
        may be determined with reference to an index, formula or other method
        (which index, formula or method may be based, without limitation, on one
        or more currencies, currency units, composite currencies, commodities,
        equity indices or other indices), and the manner in which such amounts
        shall be determined;

                (13) provisions, if any, granting special rights to the Holders
        of Securities of the series upon the occurrence of such events as may be
        specified;

                (14) any deletions from, modifications of or additions to the
        Events of Default or covenants of the Issuer set forth in this Indenture
        with respect to Securities of the series, (whether or not such Events of
        Default or covenants are consistent with the Events of Default or
        covenants set forth herein);



                                       16
<PAGE>   25

                (15) whether Securities of such series will be issued in
        certificated or book-entry form and, if certificated, whether Securities
        of the series are to be issuable as Registered Securities, Bearer
        Securities (with or without coupons) or both, any restrictions
        applicable to the offer, sale or delivery of Bearer Securities and the
        terms upon which Bearer Securities of the series may be exchanged for
        Registered Securities of the series and vice versa (if permitted by
        applicable laws and regulations), whether any Securities of the series
        are to be issuable initially in temporary global form and whether any
        Securities of the series are to be issuable in permanent global form
        with or without coupons and, if so, whether beneficial owners of
        interests in any such permanent global Security may exchange such
        interests for Securities of such series and of like tenor of any
        authorized form and denomination and the circumstances under which any
        such exchanges may occur, if other than in the manner provided in
        Section 305, and, if Registered Securities of the series are to be
        issuable as a global Security, the identity of the depository for such
        series;

                (16) the date as of which any Bearer Securities of the series
        and any temporary global Security representing outstanding Securities of
        the series shall be dated if other than the date of original issuance of
        the first Security of the series to be issued;

                (17) the Person to whom any interest on any Registered Security
        of the series shall be payable, if other than the Person in whose name
        that Security (or one or more Predecessor Securities) is registered at
        the close of business on the Regular Record Date for such interest, the
        manner in which, or the Person to whom, any interest on any Bearer
        Security of the series shall be payable, if otherwise than upon
        presentation and surrender of the Coupons appertaining thereto as they
        severally mature, and the extent to which, or the manner in which, any
        interest payable on a temporary global Security on an Interest Payment
        Date will be paid if other than in the manner provided in Section 304;

                (18) the applicability, if any, of Sections 1402 and/or 1403 to
        the Securities of the series and any provisions in modification of, in
        addition to or in lieu of any of the provisions of Article Fourteen;

                (19) if the Securities of such series are to be issuable in
        definitive form (whether upon original issue or upon exchange of a
        temporary Security of such series) only upon receipt of certain
        certificates or other documents or satisfaction of other conditions,
        then the form and/or terms of such certificates, documents or
        conditions;

                (20) the applicability, if any, of Articles Sixteen and
        Seventeen to the Securities of the series and any provisions in
        modification of, in addition to or in lieu of any of the provisions of
        Article Sixteen and Seventeen;

                (21) whether and under what circumstances the Issuer will pay
        Additional Amounts as contemplated by Section 1009 on the Securities of
        the series to any Holder who is not a United States person (including
        any modification to the definition of such term) in respect of any tax,
        assessment or governmental charge and, if so, whether the



                                       17
<PAGE>   26

        Issuer will have the option to redeem such Securities rather than pay
        such Additional Amounts (and the terms of any such option);

                (22) the terms and conditions, if any, upon which payment of the
        Securities of such series shall be subordinated to other Debt of the
        Issuer (including, without limitation, the Debt which ranks senior to
        such Securities; restrictions on payments to Holders of such Securities
        while a default with respect to such senior Debt is continuing;
        restrictions, if any, on payments to the Holders of such Securities
        following an Event of Default; and any requirements for Holders of such
        Securities to remit certain payments to the holders of such senior
        Debt); and

                (23) any other terms of the series (which terms shall not be
        inconsistent with the provisions of this Indenture).

        All Securities of any one series and the Coupons appertaining to any
Securities of such series shall be substantially identical except, in the case
of Registered Securities, as to denominations and except as may otherwise be
provided in or pursuant to the Board Resolution establishing the series (subject
to Section 303) and set forth in an Officers' Certificate or in any indenture
supplemental hereto. All Securities of any one series need not be issued at the
same time and, unless otherwise provided, a series may be reopened, without the
consent of the Holders, for issuances of additional Securities of such series.

        If any of the terms of the Securities of any series are established by
action taken pursuant to one or more Board Resolutions, a copy of an appropriate
record of such action(s) shall be certified by the Secretary or an Assistant
Secretary of the Issuer and delivered to the Trustee at or prior to the delivery
of the Officers' Certificate setting forth the terms of the Securities of such
series.

        SECTION 302. Denominations. The Securities of each series shall be
issuable in such denominations as shall be specified as contemplated by Section
301. With respect to Securities of any series denominated in Dollars, in the
absence of any such provisions, the Registered Securities of such series, other
than Registered Securities issued in global form (which may be of any
denomination), shall be issuable in denominations of $1,000 and any integral
multiple thereof and the Bearer Securities of such series, other than Bearer
Securities issued in global form (which may be of any denomination), shall be
issuable in denominations of $1,000 and any integral multiple thereof.

        SECTION 303. Execution, Authentication, Delivery and Dating. The
Securities and any Coupons appertaining thereto shall be executed on behalf of
the Issuer by its President or one of its Vice Presidents, under the Issuer's
seal reproduced thereon, and attested by its Secretary or one of its Assistant
Secretaries. The signature of any of these officers on the Securities or Coupons
may be manual or facsimile signatures of such authorized officer and may be
imprinted or otherwise reproduced on the Securities.

        Securities or Coupons and agreements relating thereto bearing the manual
or facsimile signatures of individuals who were at any time the proper officers
of the Issuer shall bind the



                                       18
<PAGE>   27
Issuer, notwithstanding that such individuals or any of them have ceased to hold
such offices prior to the authentication and delivery of such Securities or did
not hold such offices at the date of such Securities or Coupons or related
agreements.

        At any time and from time to time after the execution and delivery of
this Indenture, the Issuer may deliver Securities of a series, together with any
Coupon appertaining thereto, executed on behalf of the Issuer to the Trustee for
authentication, together with an Issuer Order for the authentication and
delivery of such Securities, and the Trustee in accordance with the Issuer Order
shall authenticate and deliver such Securities; provided, however, that, in
connection with its original issuance, no Bearer Security shall be mailed or
otherwise delivered to any location in the United States; and provided further
that, unless otherwise specified with respect to any series of Securities
pursuant to Section 301, a Bearer Security may be delivered in connection with
its original issuance only if the Person entitled to receive such Bearer
Security shall have furnished a certificate in the form set forth in Exhibit A-1
to this Indenture or such other certificate as may be specified with respect to
any series of Securities pursuant to Section 301, dated no earlier than 15 days
prior to the earlier of the date on which such Bearer Security is delivered and
the date on which a temporary Security first becomes exchangeable for such
Bearer Security in accordance with the terms of such temporary Security and this
Indenture. If any Security shall be represented by a permanent global Bearer
Security, then, for purposes of this Section and Section 304, the notation of a
beneficial owner's interest therein upon original issuance of such Security or
upon exchange of a portion of a temporary global Security shall be deemed to be
delivery in connection with its original issuance of such beneficial owner's
interest in such permanent global Security. Except as permitted by Section 306,
the Trustee shall not authenticate and deliver any Bearer Security unless all
appurtenant Coupons then matured have been detached and canceled. If all the
Securities of any series are not to be issued at one time and if the Board
Resolution or supplemental indenture establishing such series shall so permit,
such Issuer Order may set forth procedures acceptable to the Trustee for the
issuance of such Securities and determining the terms of particular Securities
of such series, such as interest rate or formula, maturity date, date of
issuance and date from which interest shall accrue. In authenticating such
Securities, and accepting the additional responsibilities under this Indenture
in relation to such Securities, the Trustee shall be entitled to receive, and
(subject to TIA Sections 315(a) through 315(d)) shall be fully protected in
relying upon,

                        (i) an Opinion of Counsel stating that

                (a) the form or forms of such Securities and any Coupons have
        been established in conformity with the provisions of this Indenture;

                (b) the terms of such Securities and any Coupons have been
        established in conformity with the provisions of this Indenture; and

                (c) such Securities, together with any Coupons appertaining
        thereto, when completed by appropriate insertions and executed and
        delivered by the Issuer to the Trustee for authentication in accordance
        with this Indenture, authenticated and delivered by the Trustee in
        accordance with this Indenture and issued by the Issuer in the manner
        and subject to any conditions specified in such Opinion of Counsel, will
        constitute legal,



                                       19
<PAGE>   28

        valid and binding obligations of the Issuer, enforceable in accordance
        with their terms, subject to applicable bankruptcy, insolvency,
        reorganization and other similar laws of general applicability relating
        to or affecting the enforcement of creditors' rights generally and to
        general equitable principles; and

                             (ii) an Officers' Certificate stating that all
conditions precedent provided for in this Indenture relating to the issuance of
the Securities have been complied with and that, to the best of the knowledge of
the signers of such certificate, no Event of Default with respect to any of the
Securities shall have occurred and be continuing.

        If such form or terms have been so established, the Trustee shall not be
required to authenticate such Securities if the issue of such Securities
pursuant to this Indenture will affect the Trustee's own rights, duties,
obligations or immunities under the Securities and this Indenture or otherwise
in a manner which is not acceptable to the Trustee.

        Each Registered Security shall be dated the date of its authentication
and each Bearer Security shall be dated as of the date specified as contemplated
by Section 301.

        No Security or Coupon shall be entitled to any benefit under this
Indenture or be valid or obligatory for any purpose unless there appears on such
Security or Security to which such Coupon appertains a certificate of
authentication substantially in the form provided for herein duly executed by
the Trustee by manual signature of an authorized officer, and such certificate
upon any Security shall be conclusive evidence, and the only evidence, that such
Security has been duly authenticated and delivered hereunder and is entitled to
the benefits of this Indenture. Notwithstanding the foregoing, if any Security
shall have been authenticated and delivered hereunder but never issued and sold
by the Issuer, and the Issuer shall deliver such Security to the Trustee for
cancellation as provided in Section 309 together with a written statement (which
need not comply with Section 102 and need not be accompanied by an Opinion of
Counsel) stating that such Security has never been issued and sold by the
Issuer, for all purposes of this Indenture such Security shall be deemed never
to have been authenticated and delivered hereunder and shall never be entitled
to the benefits of this Indenture.

        SECTION 304. Temporary Securities.

        (a) Pending the preparation of definitive Securities of any series, the
Issuer may execute, and upon Issuer Order the Trustee shall authenticate and
deliver, temporary Securities which are printed, lithographed, typewritten,
mimeographed or otherwise produced, in any authorized denomination, of the tenor
of the definitive Securities in lieu of which they are issued, in registered
form, or, if authorized, in bearer form with one or more coupons or without
coupons, and with such appropriate insertions, omissions, substitutions and
other variations as the officers executing such Securities may determine, as
conclusively evidenced by their execution of such Securities. In the case of
Securities of any series, such temporary Securities may be in global form.

        Except in the case of temporary Securities in global form (which shall
be exchanged in accordance with Section 304(b) or as otherwise provided in or
pursuant to a Board Resolution), if



                                       20
<PAGE>   29
temporary Securities of any series are issued, the Issuer will cause Definitive
Securities of that series to be prepared without unreasonable delay. After the
preparation of definitive Securities of such series, the temporary Securities of
such series shall be exchangeable for definitive Securities of such series upon
surrender of the temporary Securities of such series at the office or agency of
the Issuer in a Place of Payment for that series, without charge to the Holder.
Upon surrender for cancellation of any one or more temporary Securities of any
series (accompanied by any non-matured coupons appertaining thereto), the Issuer
shall execute and the Trustee shall authenticate and deliver in exchange
therefor a like principal amount of definitive Securities of the same series of
authorized denominations; provided, however, that no definitive Bearer Security
shall be delivered in exchange for a temporary Registered Security; and provided
further that a definitive Bearer Security shall be delivered in exchange for a
temporary Bearer Security only in compliance with the conditions set forth in
Section 303. Until so exchanged, the temporary Securities of any series shall in
all respects be entitled to the same benefits under this Indenture as definitive
Securities of such series;

        (b) Unless otherwise provided in or pursuant to a Board Resolution, this
Section 304(b) shall govern the exchange of temporary Securities issued in
global form other than through the facilities of DTC. If any such temporary
Security is issued in global form, then such temporary global Security shall,
unless otherwise provided therein, be delivered to the London office of a
depository or common depository (the "Common Depository"), for the benefit of
Euroclear and CEDEL, for credit to the respective accounts of the beneficial
owners of such Securities (or to such other accounts as they may direct).

        Without unnecessary delay but in any event not later than the date
specified in, or determined pursuant to the terms of, any such temporary global
Security (the "Exchange Date"), the Issuer shall deliver to the Trustee
definitive Securities, in aggregate principal amount equal to the principal
amount of such temporary global Security, executed by the Issuer. On or after
the Exchange Date, such temporary global Security shall be surrendered by the
Common Depository to the Trustee, as the Issuer's agent for such purpose, to be
exchanged, in whole or from time to time in part, for definitive Securities
without charge, and the Trustee shall authenticate and deliver, in exchange for
each portion of such temporary global Security, an equal aggregate principal
amount of definitive Securities of the same series of authorized denominations
and of like tenor as the portion of such temporary global Security to be
exchanged. The definitive Securities to be delivered in exchange for any such
temporary global Security shall be in bearer form, registered form, permanent
global bearer form or permanent global registered form, or any combination
thereof, as specified as contemplated by Section 301, and, if any combination
thereof is so specified, as requested by the beneficial owner thereof; provided,
however, that, unless otherwise specified in such temporary global Security,
upon such presentation by the Common Depository, such temporary global Security
is accompanied by a certificate dated the Exchange Date or a subsequent date and
signed by Euroclear as to the portion of such temporary global Security held for
its account then to be exchanged and a certificate dated the Exchange Date or a
subsequent date and signed by CEDEL as to the portion of such temporary global
Security held for its account then to be exchanged, each in the form set forth
in Exhibit A-2 to this Indenture or in such other form as may be established
pursuant to Section 301; and provided further that definitive Bearer Securities
shall be delivered in exchange for a portion of a temporary global Security only
in compliance with the requirements of Section 303.



                                       21
<PAGE>   30

        Unless otherwise specified in such temporary global Security, the
interest of a beneficial owner of Securities of a series in a temporary global
Security shall be exchanged for definitive Securities of the same series and of
like tenor following the Exchange Date when the account holder instructs
Euroclear or CEDEL, as the case may be, to request such exchange on his behalf
and delivers to Euroclear or CEDEL, as the case may be, a certificate in the
form set forth in Exhibit A-1 to this Indenture (or in such other forms as may
be established pursuant to Section 301), dated no earlier than 15 days prior to
the Exchange Date, copies of which certificate shall be available from the
offices of Euroclear and CEDEL, the Trustee, any Authenticating Agent appointed
for such series of Securities and each Paying Agent. Unless otherwise specified
in such temporary global Security, any such exchange shall be made free of
charge to the beneficial owners of such temporary global Security, except that a
Person receiving definitive Securities must bear the cost of insurance, postage,
transportation and the like unless such Person takes delivery of such definitive
Securities in person at the offices of Euroclear or CEDEL. Definitive Securities
in bearer form to be delivered in exchange for any portion of a temporary global
Securities shall be delivered only outside the United States.

        Until exchanged in full as hereinabove provided, the temporary
Securities of any series shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities of the same series and of like
tenor authenticated and delivered hereunder, except that, unless otherwise
specified as contemplated by Section 301, interest payable on a temporary global
Security on an Interest Payment Date for Securities of such series occurring
prior to the applicable Exchange Date shall be payable to Euroclear and CEDEL on
such Interest Payment Date upon delivery by Euroclear and CEDEL to the Trustee
of a certificate or certificates in the form set forth in Exhibit A-2 to this
Indenture (or in such other forms as may be established pursuant to Section
301), for credit without further interest on or after such Interest Payment Date
to the respective accounts of persons who are the beneficial owners of such
temporary global Security on such Interest Payment Date and who have each
delivered to Euroclear or CEDEL, as the case may be, a certificate dated no
earlier than 15 days prior to the Interest Payment Date occurring prior to such
Exchange Date in the form set forth as Exhibit A-1 to this Indenture (or in such
other forms as may be established pursuant to Section 301). Notwithstanding
anything to the contrary herein contained, the certifications made pursuant to
this paragraph shall satisfy the certification requirements of the preceding two
paragraphs of this Section 304 (b) and of the third paragraph of Section 303 of
this Indenture and the interests of the Persons who are the beneficial owners of
a temporary global Security with respect to which such certification was made
will be exchanged for definitive Securities of the same series and of like tenor
on the Exchange Date or the date of certification if such date occurs after the
Exchange Date, without further act or deed by such beneficial owners. Except as
otherwise provided in this paragraph no payments of principal or interest owing
with respect to a beneficial interest in a temporary global Security will be
made unless and until such interest in such temporary global Security shall have
been exchanged for an interest in a definitive Security. Any interest so
received by Euroclear and CEDEL and not paid as herein provided shall be
returned to the Trustee prior to the expiration of two years after such Interest
Payment Date in order to be repaid to the Issuer.

        SECTION 305. Registration, Registration of Transfer and Exchange. The
Issuer shall cause to be kept at the Corporate Trust Office of the Trustee or in
any office or agency of the Issuer in a Place of Payment a register for each
series of Registered Securities (the registers



                                       22
<PAGE>   31
maintained in such office or in any such office or agency of the Issuer in a
Place of Payment being herein sometimes referred to collectively as the
"Security Register") in which, subject to such reasonable regulations as it may
prescribe, the Issuer shall provide for the registration of Registered
Securities and of transfers of Registered Securities. The Security Register
shall be in written form or any other form capable of being converted into
written form within a reasonable time. The Trustee, at its Corporate Trust
Office, is hereby initially appointed "Security Registrar" for the purpose of
registering Registered Securities and transfers of Registered Securities on such
Security Register as herein provided. In the event that the Trustee shall cease
to be Security Registrar, it shall have the right to examine the Security
Register at all reasonable times.

        Subject to the provisions of this Section 305, upon surrender for
registration of transfer of any Registered Security of any series at any office
or agency of the Issuer in a Place of Payment for that series, the Issuer shall
execute, and the Trustee shall authenticate and deliver, in the name of the
designated transferee or transferees, one or more new Registered Securities of
the same series, of any authorized denominations and of a like aggregate
principal amount, bearing a number not contemporaneously outstanding, and
containing identical terms and provisions.

        Subject to the provisions of this Section 305, at the option of the
Holder, Registered Securities of any series may be exchanged for other
Registered Securities of the same series, of any authorized denomination or
denominations and of a like aggregate principal amount, containing identical
terms and provisions, upon surrender of the Registered Securities to be
exchanged at any such office or agency. Whenever any such Registered Securities
are so surrendered for exchange, the Issuer shall execute, and the Trustee shall
authenticate and deliver, the Registered Securities which the Holder making the
exchange is entitled to receive. Unless otherwise specified with respect to any
series of Securities as contemplated by Section 301, and as set forth below,
Bearer Securities may not be issued in exchange for Registered Securities.

        If (but only if) permitted by the applicable Board Resolution and
(subject to Section 303) set forth in the applicable Officers' Certificate, or
in any indenture supplemental hereto, delivered as contemplated by Section 301,
at the option of the Holder, Bearer Securities of any Series may be exchanged
for Registered Securities of the same series of any authorized denominations and
of a like aggregate principal amount and tenor, upon surrender of the Bearer
Securities to be exchanged at any such office or agency, with all unmatured
coupons and all matured coupons in default thereto appertaining. If the Holder
of a Bearer Security is unable to produce any such unmatured coupon or coupons
or matured coupon or coupons in default any such permitted exchange may be
effected if the Bearer Securities are accompanied by payment in funds acceptable
to the Issuer in an amount equal to the face amount of such missing coupon or
coupons, or the surrender of such missing coupon or coupons may be waived by the
Issuer and the Trustee if there is furnished to them such security or indemnity
as they may require to save each of them and any Paying Agent harmless. If
thereafter the Holder of such Security shall surrender to any Paying Agent any
such missing coupon in respect of which such a payment shall have been made,
such Holder shall be entitled to receive the amount of such payment; provided,
however, that, except as otherwise provided in Section 1002, interest
represented by coupons shall be payable only upon presentation and surrender of
those coupons at an office or agency located outside the United States.
Notwithstanding the foregoing, in case a Bearer Security of



                                       23
<PAGE>   32
any series is surrendered at any such office or agency in a permitted exchange
for a Registered Security of the same series and like tenor after the close of
business at such office or agency on (i) any Regular Record Date and before the
opening of business at such office or agency on the relevant Interest Payment
Date, or (ii) any Special Record Date and before the opening of business at such
office or agency on the related proposed date for payment of Defaulted Interest,
such Bearer Security shall be surrendered without the coupon relating to such
Interest Payment Date or proposed date for payment, as the case may be, and
interest or Defaulted Interest, as the case may be, will not be payable on such
Interest Payment Date or proposed date for payment, as the case may be, in
respect of the Registered Security issued in exchange for such Bearer Security,
but will be payable only to the Holder of such coupon when due in accordance
with the provisions of this Indenture. Whenever any Securities are so
surrendered for exchange, the Issuer shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

        Notwithstanding the foregoing, except as otherwise specified as
contemplated in Section 301, any permanent global Security shall be exchangeable
only as provided in this paragraph. If the depository for any permanent global
Security is DTC, then, unless the terms of such global Security expressly permit
such global Security to be exchanged in whole or in part for definitive
Securities, a global Security may be transferred, in whole but not in part, only
to a nominee of DTC, or by a nominee of DTC to DTC, or to a successor to DTC for
such, global Security selected or approved by the Issuer or to a nominee of such
successor to DTC. If at any time DTC notifies the Issuer that it is unwilling or
unable to continue as depository for the applicable global Security or
Securities or if at any time DTC ceases to be a clearing agency registered under
the Securities Exchange Act of 1934, as amended, if so required by applicable
law or regulation, the Issuer shall appoint a successor depository with respect
to such global Security or Securities and provide notice to the Trustee of such
appointment. If (x) a successor depository for such global Security or
Securities is not appointed by the Issuer within 90 days after the Issuer
receives such notice or becomes aware of such unwillingness, inability or
ineligibility, (y) an Event of Default has occurred and is continuing and the
beneficial owners representing a majority in principal amount of the applicable
series of Securities represented by such global Security or Securities advise
DTC, with a copy to the Trustee and the Issuer, to cease acting as depository
for such global Security or Securities or (z) the Issuer, in its sole
discretion, determines at any time that all (but not less than all) Outstanding
Securities of any series issued or issuable in the form of one or more global
Securities shall no longer be represented by such global Security or Securities
and advises the Trustee and DTC of such determination, then the Issuer shall
execute, and the Trustee shall authenticate and deliver, definitive Securities
of like series, rank, tenor and terms in a definitive form in an aggregate
principal amount equal to the principal amount of such global Security or
Securities. If any beneficial owner of an interest in a permanent global
Security otherwise entitled to exchange such interest for definitive Securities
of such series and of like tenor and principal amount of another authorized form
and denomination, as specified as contemplated by Section 301 and provided that
any applicable notice provided in the permanent global Security shall have been
given, then without unnecessary delay but in any event no later than the
earliest date on which such interest may be so exchanged, the Issuer shall
execute, and the Trustee shall authenticate and deliver, definitive Securities
in aggregate principal amount equal to the principal amount of such beneficial
owner's interest in such



                                       24
<PAGE>   33
permanent global Security. On or after the earliest date on which such interests
may be so exchanged, such permanent global Security shall be surrendered for
exchange by DTC or such other depository as shall be specified in the Issuer
Order with respect thereto to the Trustee; provided, however, that no such
exchanges may occur during a period beginning at the opening of business 15 days
before any selection of Securities to be redeemed and ending on the relevant
Redemption Date if the Security for which exchange is requested may be among
those selected for redemption; and provided further that no Bearer Security
delivered in exchange for a portion of a permanent global Security shall be
mailed or otherwise delivered to any location in the United States. If a
Registered Security is issued in exchange for any portion of a permanent global
Security after the close of business at the office or agency where such exchange
occurs on (i) a Regular Record Date and before the opening of business at such
office or agency on the relevant Interest Payment Date, or (ii) a Special Record
Date and before the opening of business at such office or agency on the related
proposed date for payment of interest or Defaulted Interest, as the case may be,
interest or defaulted interest, as the case may be, will not be payable on such
Interest Payment Date or proposed date for payment, as the case may be, in
respect of such Registered Security, but will be payable on such Interest
Payment Date or proposed date for payment, as the case may be, only to the
Person to whom interest in respect of such portion of such permanent global
Security is payable in accordance with the provisions of this Indenture.

        All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Issuer, evidencing the same
debt, and entitled to the same benefits under this Indenture, as the Securities
surrendered upon such registration of transfer or exchange.

        Every Registered Security presented or surrendered for registration of
transfer or for exchange, conversion or redemption shall (if so required by the
Issuer or the Security Registrar) be duly endorsed, or be accompanied by a
written instrument of transfer in form satisfactory to the Issuer and the
Security Registrar, duly executed by the Holder thereof or his attorney duly
authorized in writing.

        No service charge shall be made for any registration of transfer or
exchange of Securities, but the Issuer may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 304, 906, 1107 or 1305 not involving any transfer.

        The Issuer or the Trustee, as applicable, shall not be required (i) to
issue, register the transfer of or exchange any Security if such Security may be
among those selected for redemption during a period beginning at the opening of
business 15 days before selection of the Securities to be redeemed under Section
1103 and ending at the close of business on (A) if such Securities are issuable
only as Registered Securities, the day of the mailing of the relevant notice of
redemption and (B) if such Securities are issuable as Bearer Securities, the day
of the first publication of the relevant notice of redemption or, if such
Securities are also issuable as Registered Securities and there is no
publication, the mailing of the relevant notice of redemption, or (ii) to
register the transfer of or exchange any Registered Security so selected for
redemption in whole or in part, except, in the case of a Registered Security to
be redeemed in part, the portion thereof not selected for redemption may be
exchanged for a Registered Security



                                       25
<PAGE>   34
of that series and of like tenor, provided that such Registered Security shall
be simultaneously surrendered for redemption, or (iii) to issue, register the
transfer of or exchange any Security which has been surrendered for repayment at
the option of the Holder, except that portion, if any, of such Security which is
not to be so repaid.

        SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities. If any
mutilated Security or a Security with a mutilated Coupon appertaining to it is
surrendered to the Trustee or the Issuer, together with, in proper cases, such
security or indemnity as may be required by the Issuer or the Trustee to save
each of them or any agent of either of them harmless, the Issuer shall execute
and the Trustee shall authenticate and deliver in exchange therefor a new
Security of the same series and principal amount, containing identical terms and
provisions and bearing a number not contemporaneously outstanding, with Coupons
corresponding to the Coupons, if any, appertaining to the surrendered Security.

        If there shall be delivered to the Issuer and to the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
or Coupon, and (ii) such security or indemnity as may be required by them to
save each of them and any agent of either of them harmless, then, in the absence
of written notice to the Issuer or the Trustee that such Security or Coupon has
been acquired by a bona fide purchaser, the Issuer shall execute and upon its
request the Trustee shall authenticate and deliver, in lieu of any such
destroyed, lost or stolen Security or in exchange for the Security to which a
destroyed, lost or stolen Coupon appertains (with all appurtenant Coupons not
destroyed, lost or stolen), a new Security of the same series and principal
amount, containing identical terms and provisions and bearing a number not
contemporaneously outstanding with Coupons corresponding to the Coupons, if any,
appertaining to such destroyed, lost or stolen Security or to the Security to
which such destroyed, lost or stolen Coupon appertains.

        Notwithstanding the provisions of the previous two paragraphs, in case
any such mutilated, destroyed, lost or stolen Security or Coupon has become or
is about to become due and payable, the Issuer in its discretion may, instead of
issuing a new Security, with Coupons corresponding to the Coupons, if any,
appertaining to such destroyed, lost or stolen Security or to the security to
which such destroyed, lost or stolen Coupon appertains, pay such Security or
Coupon; provided, however, that payment of principal of (and premium, if any),
any interest on and any Additional Amounts with respect to, Bearer Securities
shall, except as otherwise provided in Section 1002, be payable only at an
office or agency located outside the United States and, unless otherwise
specified as contemplated by Section 301, any interest on Bearer Securities
shall be payable only upon presentation and surrender of the Coupons
appertaining thereto.

        Every new Security of any series with its coupons, if any, issued
pursuant to this Section in lieu of any mutilated, destroyed, lost or stolen
Security, or in exchange for a Security to which a mutilated, destroyed, lost or
stolen coupon may pertain, shall constitute an original additional contractual
obligation of the Issuer, whether or not the mutilated, destroyed, lost or
stolen Security and its coupons, if any, or the mutilated, destroyed, lost or
stolen coupon shall be at any time enforceable by anyone, and shall be entitled
to all the benefits of this Indenture equally and



                                       26
<PAGE>   35
proportionately with any and all other Securities of that series and their
coupons, if any, duly issued hereunder.

        The provisions of this Section are exclusive and shall preclude (to the
extent lawful) all other rights and remedies with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities or Coupons.

        SECTION 307. Payment of Interest -- Interest Rights Preserved. Except as
otherwise specified with respect to a series of Securities in accordance with
the provisions of Section 301, interest on any Registered Security that is
payable, and is punctually paid or duly provided for, on any Interest Payment
Date shall be paid to the Person in whose name that Security (or one or more
predecessor Securities) is registered at the close of business on the Regular
Record Date for such interest at the office or agency of the Issuer maintained
for such purpose pursuant to Section 1002; provided, however, that each
installment of interest on any Registered Security may at the Holder's option
upon written notice to the Trustee be paid by (i) mailing a check for such
interest, payable to or upon the written order of the Person entitled thereto
pursuant to Section 308, to the address of such Person as it appears on the
Security Register or (ii) transfer to an account maintained by the payee with a
bank or other depository institution located inside the United States.

        Unless otherwise provided as contemplated by Section 301 with respect to
the Securities of any series, payment of interest may be made, in the case of a
Bearer Security, by transfer to an account maintained by the payee with a bank
located outside the United States.

        Unless otherwise provided as contemplated by Section 301, every
permanent global Security will provide that interest, if any, payable on any
Interest Payment Date will be paid to DTC, Euroclear and/or CEDEL, as the case
may be, with respect to that portion of such permanent global Security held for
its account by Cede & Co. or the Common Depository, as the case may be, for the
purpose of permitting such party to credit the interest received by it in
respect of such permanent global Security to the accounts of the beneficial
owners thereof.

        In case a Bearer Security of any series is surrendered in exchange for a
Registered Security of such series after the close of business (at an office or
agency in a Place of Payment for such series) on any Regular Record Date and
before the opening of business (at such office or agency) on the next succeeding
Interest Payment Date, such Bearer Security shall be surrendered without the
Coupon relating to such Interest Payment Date and interest will not be payable
on such Interest Payment Date in respect of the Registered Security issued in
exchange for such Bearer Security, but will be payable only to the Holder of
such Coupon when due in accordance with the provisions of this Indenture.

        Except as otherwise specified with respect to a series of Securities in
accordance with the provisions of Section 301, any interest on any Registered
Security of any series that is payable, but is not punctually paid or duly
provided for, on any Interest Payment Date (herein called "Defaulted Interest")
shall forthwith cease to be payable to the registered Holder thereof on the
relevant Regular Record Date by virtue of having been such Holder, and such
Defaulted Interest shall be paid by the Issuer, as provided in clause (1) or (2)
below:



                                       27
<PAGE>   36

                (1) The Issuer may elect to make payment of any Defaulted
        Interest to the Persons in whose names the Registered Securities of such
        series (or their respective Predecessor Securities) are registered at
        the close of business on a Special Record Date for the payment of such
        Defaulted Interest, which shall be fixed in the following manner. The
        Issuer shall notify the Trustee in writing of the amount of Defaulted
        Interest proposed to be paid on each Registered Security of such series
        and the date of the proposed payment (which shall not be less than 20
        days after such notice is received by the Trustee), and at the same time
        the Issuer shall deposit with the Trustee an amount of money in the
        currency or currencies, currency unit or units or composite currency or
        currencies in which the Securities of such series are payable (except as
        otherwise specified pursuant to Section 301 for the Securities of such
        series) equal to the aggregate amount proposed to be paid in respect of
        such Defaulted Interest or shall make arrangements satisfactory to the
        Trustee for such deposit on or prior to the date of the proposed
        payment, such money when deposited to be held in trust for the benefit
        of the Persons entitled to such Defaulted Interest as in this clause
        provided. Thereupon the Trustee shall fix a Special Record Date for the
        payment of such Defaulted Interest which shall not be more than 15 days
        and not less than 10 days prior to the date of the proposed payment and
        not less than 10 days after the receipt by the Trustee of the notice of
        the proposed payment. The Trustee shall promptly notify the Issuer of
        such Special Record Date and, in the name and at the expense of the
        Issuer, shall cause notice of the proposed payment of such Defaulted
        Interest and the Special Record Date therefor to be mailed, first-class
        postage prepaid, to each Holder of Registered Securities of such series
        at his address as it appears in the Security Register not less than 10
        days prior to such Special Record Date. The Trustee may, in its
        discretion, in the name and at the expense of the Issuer, cause a
        similar notice to be published at least once in an Authorized Newspaper
        in each Place of Payment, but such publications shall not be a condition
        precedent to the establishment of such Special Record Date. Notice of
        the proposed payment of such Defaulted Interest and the Special Record
        Date therefor having been mailed as aforesaid, such Defaulted Interest
        shall be paid to the Persons in whose names the Registered Securities of
        such series (or their respective predecessor Securities) are registered
        at the close of business on such Special Record Date and shall no longer
        be payable pursuant to the following clause (2). In case a Bearer
        Security of any series is surrendered for transfer or exchange at the
        office or agency in a Place of Payment for such series after the close
        of business at such office or agency on any Special Record Date and
        before the opening of business at such office or agency on the related
        proposed date for payment of Defaulted Interest, such Bearer Security
        shall be surrendered without the Coupon relating to such Proposed date
        of payment and Defaulted Interest will not be payable on such proposed
        date of payment in respect of the Registered Security issued in exchange
        for such Bearer Security, but will be payable only to the Holder of such
        Coupon when due in accordance with the provisions of this Indenture.

                (2) The Issuer may make payment of any Defaulted Interest on the
        Registered Securities of any series in any other lawful manner not
        inconsistent with the requirements of any securities exchange on which
        such Securities may be listed, and upon such notice as may be required
        by such exchange, if, after notice given by the Issuer to the Trustee of



                                       28
<PAGE>   37

        the proposed payment pursuant to this clause, such manner of payment
        shall be deemed practicable by the Trustee.

        Subject to the foregoing provisions of this Section and Section 305,
each Security delivered under this Indenture upon registration of transfer of or
in exchange for or in lieu of any other Security shall carry the rights to
interest accrued and unpaid, and to accrue, which were carried by such other
Security.

        SECTION 308. Persons Deemed Owners. Prior to due presentment of a
Registered Security for registration of transfer, the Issuer, the Trustee and
any agent of the Issuer or the Trustee may treat the Person in whose name such
Registered Security is registered as the owner of such Security for the purpose
of receiving payment of principal of (and premium, if any), and (subject to
Sections 305 and 307) interest on, such Registered Security and for all other
purposes whatsoever, whether or not such Registered Security is overdue, and
neither the Issuer, the Trustee nor any agent of the Issuer or the Trustee shall
be affected by notice to the contrary.

        Title to any Bearer Security and any Coupons appertaining thereto shall
pass by delivery. The Issuer, the Trustee and any agent of the Issuer or the
Trustee may treat the Holder of any Bearer Security and the Holder of any Coupon
as the absolute owner of such Security or Coupon for the purpose of receiving
payment thereof or on account thereof and for all other purposes whatsoever,
whether or not such Security or Coupon is overdue, and neither the Issuer, the
Trustee nor any agent of the Issuer or the Trustee shall be affected by notice
to the contrary.

        None of the Issuer, the Trustee, any Paying Agent or the Security
Registrar will have any responsibility or liability for any aspect of the
records relating to or payments made on account of beneficial ownership
interests of a Security in global form or for maintaining, supervising or
reviewing any records relating to such beneficial ownership interests. All
notices and communications to be given to Holders and all payments to be made to
Holders under a Security in global form shall be given or made only to or upon
the order of the registered Holder (which shall be the depository or its
nominee) thereof. The rights of beneficial owners of a Security in global form
shall be exercised only through the depository, subject to the applicable rules
and procedures of the depository.

        Notwithstanding the foregoing, with respect to any global Security,
nothing herein shall prevent the Issuer, the Trustee, or any agent of the Issuer
or the Trustee, from giving effect to any written certification, proxy or other
authorization furnished by any depository, as a Holder, with respect to such
global Security or impair, as between such depository and owners of beneficial
interests in such global Security, the operation of customary practices
governing the exercise of the rights of such depository (or its nominee) as
Holder of such global Security. The Trustee, Issuer, any Paying Agent or the
Security Registrar may rely and shall be fully protected in relying upon
information furnished by any such depository with respect to its members,
participants and any beneficial owners.

        SECTION 309. Cancellation. All Securities and coupons surrendered for
payment, redemption, repayment at the option of the Holder, registration of
transfer or exchange for credit against any sinking fund payment shall, if
surrendered to any Person other than the Trustee, be



                                       29
<PAGE>   38
delivered to the Trustee, and any such Securities and Coupons and Securities and
Coupons surrendered directly to the Trustee for any such purpose shall be
promptly canceled by it. The Issuer may at any time deliver to the Trustee for
cancellation any Securities previously authenticated and delivered hereunder
which the Issuer may have acquired in any manner whatsoever, and may deliver to
the Trustee (or to any other Person for delivery to the Trustee) for
cancellation any Securities previously authenticated hereunder which the Issuer
has not issued and sold, and all Securities so delivered shall be promptly
canceled by the Trustee. If the Issuer shall so acquire any of the Securities,
however, such acquisition shall not operate as a redemption or satisfaction of
the indebtedness represented by such Securities unless and until the same are
surrendered to the Trustee for cancellation. No Securities shall be
authenticated in lieu of or in exchange for any Securities canceled as provided
in this Section, except as expressly permitted by this Indenture. Canceled
Securities and Coupons held by the Trustee shall be destroyed by the Trustee
(subject to the record-retention requirements of the Exchange Act) and the
Trustee shall deliver a certificate of such destruction to the Issuer unless by
a Issuer Order the Issuer directs their return to it.

        SECTION 310. Computation of Interest. Except as otherwise specified as
contemplated by Section 301 with respect to Securities of any series, interest
on the Securities of each series shall be computed on the basis of a 360-day
year consisting of twelve 30-day months.

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

        SECTION 401. Satisfaction and Discharge of Indenture. This Indenture
shall upon Issuer Request cease to be of further effect with respect to any
series of Securities specified in such Issuer Request (except as to any
surviving rights of registration of transfer or exchange of Securities of such
series herein expressly provided for and any right to receive Additional
Amounts, as provided in Section 1009), and the Trustee, upon receipt of a Issuer
Order, and at the expense of the Issuer, shall execute proper instruments
acknowledging satisfaction and discharge of its Indenture as to such series when

        (1) either:

                (A) all Securities of such series theretofore authenticated and
        delivered and all Coupons, if any, appertaining thereto (other than (i)
        Coupons appertaining to Bearer Securities surrendered for exchange for
        Registered Securities and maturing after such exchange, whose surrender
        is not required or has been waived as provided in Section 305, (ii)
        Securities and Coupons of such series which have been destroyed, lost or
        stolen and which have been replaced or paid as provided in Section 306,
        (iii) Coupons appertaining to Securities called for redemption and
        maturing after the relevant Redemption Date, whose surrender has been
        waived as provided in Section 1106, and (iv) Securities and Coupons of
        such series for whose payment money has theretofore been deposited in
        trust or segregated and held in trust by the Issuer and thereafter
        repaid to the Issuer or discharged from such trust, as provided in
        Section 1003) have been delivered to the Trustee for cancellation; or



                                       30
<PAGE>   39

                (B) all Securities of such series and, in the case of (i) or
        (ii) below, any Coupons pertaining thereto, not theretofore delivered to
        the Trustee for cancellation

                        (i) have become due and payable, or

                        (ii) will become due and payable at their Stated
                Maturity within one year, or

                        (iii) if redeemable at the option of the Issuer, are to
                be called for redemption within one year under arrangements
                satisfactory to the Trustee for the giving of notice of
                redemption by the Trustee in the name, and at the expense, of
                the Issuer,

                and the Issuer, in the case of (i), (ii) or (iii) above, has
                irrevocably deposited or caused to be deposited with the Trustee
                as funds in trust for such purpose an amount in the currency or
                currencies, currency unit or units or composite currency or
                currencies in which the Securities of such series are payable,
                sufficient to pay and discharge the entire indebtedness on such
                Securities and such Coupons not theretofore delivered to the
                Trustee for cancellation, for principal (and premium, if any)
                and interest, and any Additional Amounts with respect thereto,
                to the date of such deposit (in the case of Securities which
                have become due and payable) or to the Stated Maturity or
                Redemption Date, as the case may be; and

                (2) the Issuer has paid or caused to be paid all other sums
        payable hereunder by the Issuer; and

                (3) the Issuer has delivered to the Trustee an Officers'
        Certificate and an Opinion of Counsel, each stating that all conditions
        precedent herein provided for relating to the satisfaction and discharge
        of this Indenture as to such series have been complied with.

        The obligations of the Issuer to the Trustee and any predecessor Trustee
under Section 606, the obligations of the Issuer to any Authenticating Agent
under Section 611 and, if money shall have been deposited with and held by the
Trustee pursuant to subclause (B) of clause (1) of this Section, the obligations
of the Trustee under Section 402 and the last paragraph of Section 1003 shall
survive the satisfaction and discharge of this Indenture.

        SECTION 402. Application of Trust Funds. Subject to the provisions of
the last paragraph of Section 1003, all monies deposited with the Trustee
pursuant to Section 401 shall be held in trust and applied by it, in accordance
with the provisions of the Securities, the Coupons and this Indenture, to the
payment, either directly or through any Paying Agent (but not in any event
including the Issuer acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled thereto, of the principal (and premium, if
any), and any interest and Additional Amounts for whose payment such money has
been deposited with or received by the Trustee. Such money shall be segregated
from other funds of the Trustee.



                                       31
<PAGE>   40

                                  ARTICLE FIVE

                                    REMEDIES

        SECTION 501. Events of Default. "Event of Default," wherever used herein
with respect to any particular series of Securities, means any one of the
following events (whatever the reason for such Event of Default and whether or
not it shall be voluntary or involuntary or be effected by operation of law or
pursuant to any judgment, decree or order of any court or any order, rule or
regulation of any administrative or governmental body):

                (1) default in the payment of any interest upon or any
        Additional Amounts payable in respect of any Security of that series or
        of any Coupon appertaining thereto, when such interest, Additional
        Amounts or Coupon becomes due and payable, and continuance of such
        default for a period of 30 days; or

                (2) default in the payment of the principal of (or premium, if
        any, on) any Security of that series when it becomes due and payable at
        its Maturity; or

                (3) default in the deposit of any sinking fund payment, when and
        as due by the terms of any Security of that series; or

                (4) default in the performance of, or breach of, any covenant or
        warranty of the Issuer in this Indenture with respect to any Security of
        that series (other than a covenant or warranty a default in whose
        performance or whose breach is elsewhere in this Section 501
        specifically dealt with), and continuance of such default or breach for
        a period of 60 days after there has been given, by registered or
        certified mail, to the Issuer by the Trustee or to the Issuer and the
        Trustee by the Holders of at least a majority in principal amount of the
        Outstanding Securities of that series a written notice specifying such
        default or breach and requiring it to be remedied and stating that such
        notice is a "Notice of Default" hereunder; or

                (5) a default under any bond, debenture, note or other evidence
        of indebtedness of the Issuer, or under any mortgage, indenture or other
        instrument of the Issuer (including a default with respect to Securities
        of any series other than that series) under which there may be issued or
        by which there may be secured any indebtedness of the Issuer (or by any
        Subsidiary, the repayment of which the Issuer has guaranteed or for
        which the Issuer is directly responsible or liable as obligor or
        guarantor), whether such indebtedness now exists or shall hereafter be
        created, which default shall constitute a failure to pay an aggregate
        principal amount exceeding $10,000,000 of such indebtedness when due and
        payable which shall continue after the expiration of any applicable
        grace period with respect thereto or shall have resulted in such
        indebtedness in an aggregate principal amount exceeding $10,000,000
        becoming or being declared due and payable prior to the date on which it
        would otherwise have become due and payable, without such indebtedness
        having been discharged, or such acceleration having been rescinded or
        annulled, within a period of 10 days after there shall have been given,
        by registered or certified mail, to the Issuer by the Trustee or to the
        Issuer and the Trustee by the Holders



                                       32
<PAGE>   41

        of at least a majority in principal amount of the Outstanding Securities
        of that series a written notice specifying such default and requiring
        the Company to cause such indebtedness to be discharged or cause such
        acceleration to be rescinded or annulled and stating that such notice is
        a "Notice of Default" hereunder; or

                (6) the Issuer or any Significant Subsidiary pursuant to or
        within the meaning of any Bankruptcy Law:

                      (A) commences a voluntary case,

                      (B) consents to the entry of an order for relief against
        it in an involuntary case,

                      (C) consents to the appointment of a Custodian of it for
        all or substantially all of its property, or

                      (D) makes a general assignment for the benefit of its
        creditors; or

                (7) a court of competent jurisdiction enters an order or decree
        under any Bankruptcy Law that:

                      (A) is for relief against the Issuer or any Significant
        Subsidiary in an involuntary case,

                      (B) appoints a Custodian of the Issuer or any Significant
        Subsidiary or for all or substantially all of either of its property, or

                      (C) orders the liquidation of the Issuer or any
        Significant Subsidiary and the order or decree remains unstayed and in
        effect for 90 days; or

                (8) any other Event of Default provided with respect to
        Securities of that series.

        As used in this Section 501, the term "Bankruptcy Law" means Title 11,
U.S. Code or any similar Federal or State law for the relief of debtors and the
term "Custodian" means any receiver, trustee, assignee, liquidator or other
similar official under any Bankruptcy Law.

        SECTION 502. Acceleration of Maturity; Rescission and Annulment. If an
Event of Default with respect to Securities of any series at the time
Outstanding occurs and is continuing, then and in every such case the Trustee or
the Holders of not less than a majority in principal amount of the Outstanding
Securities of that series may declare the principal (or, if any Securities are
Original Issue Discount Securities or Indexed Securities, such portion of the
principal as may be specified in the terms thereof) of all the Securities of
that series to be due and payable immediately, by a notice in writing to the
Issuer (and to the Trustee if given by the Holders), and upon any such
declaration such principal or specified portion thereof shall become immediately
due and payable.



                                       33
<PAGE>   42

        At any time after such a declaration of acceleration with respect to
Securities of any series has been made and before a judgment or decree for
payment of the money due has been obtained by the Trustee as hereinafter in this
Article provided, the Holders of not less than a majority in principal amount of
the Outstanding Securities of that series, by written notice to the Issuer and
the Trustee, may rescind and annul such declaration and its consequences if:

                (1) the Issuer has paid or deposited with the Trustee a sum
        sufficient to pay in the currency, currency unit or composite currency
        in which the Securities of such series are payable (except as otherwise
        specified pursuant to Section 301 for the Securities of such series):

                      (A) all overdue installments of interest and any
        Additional Amounts payable in respect of all Outstanding Securities of
        that series and any related coupons,

                      (B) the principal of (and premium, if any, on) any
        Outstanding Securities of that series which have become due otherwise
        than by such declaration of acceleration and interest thereon at the
        rate or rates borne by or provided for in such Securities,

                      (C) to the extent that payment of such interest is lawful,
        interest upon overdue installments of interest and any Additional
        Amounts at the rate or rates borne by or provided for in such
        Securities, and

                      (D) all sums paid or advanced by the Trustee hereunder and
        the reasonable compensation, expenses, disbursements and advances of the
        Trustee, its agents and counsel; and

                (2) all Events of Default with respect to Securities of that
        series, other than the nonpayment of the principal of (or premium, if
        any) or interest on Securities of that series which have become due
        solely by such declaration of acceleration, have been cured or waived as
        provided in Section 513.

        No such rescission shall affect any subsequent default or impair any
right consequent thereon.

        SECTION 503. Collection of Indebtedness and Suits for Enforcement by
Trustee. The Issuer covenants that if:

                (1) default is made in the payment of any installment of
        interest or Additional Amounts, if any, on any Securities of any series
        and any related Coupon when such interest or Additional Amount becomes
        due and payable and such default continues for a period of 30 days, or

                (2) default is made in the payment of the principal of (or
        premium, if any, on) any Security of any series at its Maturity,



                                       34
<PAGE>   43

then the Issuer will, upon demand of the Trustee, pay to the Trustee, for the
benefit of the Holders of such Securities of such series and Coupons, the whole
amount then due and payable on such Securities and Coupons for principal (and
premium, if any) and interest and Additional Amounts thereon, with interest upon
any overdue principal (and premium, if any) and, to the extent that payment of
such interest shall be legally enforceable, upon any overdue installments of
interest or Additional Amounts thereon, if any, at the rate or rates borne by or
provided for in such Securities, and, in addition thereto, such further amount
as shall be sufficient to cover the costs and expenses of collection, including
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agent and counsel.

        If the Issuer fails to pay such amounts forthwith upon such demand, the
Trustee, in its own name and as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, and may
prosecute such proceeding to judgment or final decree, and may enforce the same
against the Issuer or any other obligor upon such Securities of such series and
collect the moneys adjudged or decreed to be payable in the manner provided by
law out of the property of the Issuer or any other obligor upon such Securities
of such series, wherever situated.

        If an Event of Default with respect to Securities of any series occurs
and is continuing, the Trustee may in its discretion proceed to protect and
enforce its rights and the rights of the Holders of Securities of such series
and any related Coupons by such appropriate judicial proceedings as the Trustee
shall deem most effectual to protect and enforce any such rights, whether for
the specific enforcement of any covenant or agreement in this Indenture or in
aid of the exercise of any power granted herein, or to enforce any other proper
remedy.

        SECTION 504. Trustee May File Proofs of Claim. In case of the pendency
of any receivership, insolvency, liquidation, bankruptcy, reorganization,
arrangement, adjustment, composition or other judicial proceeding relative to
the Issuer, or any other obligor upon the Securities or the property of the
Issuer, or of such other obligor or their creditors, the Trustee (irrespective
of whether the principal of the Securities of any series shall then be due and
payable as therein expressed or by declaration or otherwise and irrespective of
whether the Trustee shall have made any demand on the Issuer for the payment of
overdue principal of, premium, if any, or interest on the Securities) shall be
entitled and empowered, by intervention in such proceeding or otherwise:

                (i) to file and prove a claim for the whole amount, or such
        lesser amount as may be provided for in the Securities of such series,
        of principal (and premium, if any) and interest and Additional Amounts,
        if any, owing and unpaid in respect of the Securities and to file such
        other papers or documents and to take such other actions including
        participating as a member of any committee of creditors appointed in the
        matter as may be necessary or advisable in order to have the claims of
        the Trustee (including any claim for the reasonable compensation,
        expenses, disbursements and advances of the Trustee, its agents and
        counsel) and of the Holders allowed in such judicial proceeding, and



                                       35
<PAGE>   44

                (ii) to collect and receive any monies or other property payable
        or deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator (or
other similar official) in any such judicial proceeding is hereby authorized by
each Holder of Securities of such series and Coupons to make such payments to
the Trustee, and in the event that such payments are made directly to the
Holders, to pay to the Trustee any amount due to it for the reasonable
compensation, expenses, disbursements and advances of the Trustee and any
predecessor Trustee, their agents and counsel, and any other amounts due the
Trustee or any predecessor Trustee under Section 606.

        Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder of a Security
or Coupon any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or Coupons or the rights of any Holder thereof, or to
authorize the Trustee to vote in respect of the claim of any Holder of a
Security or Coupon in any such proceeding.

        SECTION 505. Trustee May Enforce Claims Without Possession of Securities
of Coupons. All rights of action and claims under this Indenture or any of the
Securities or Coupons may be prosecuted and enforced by the Trustee without the
possession of any of the Securities or Coupons or the production thereof in any
proceeding relating thereto, and any such proceeding instituted by the Trustee
shall be brought in its own name as trustee of an express trust, and any
recovery of judgment shall, after provision for the payment of the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, be for the ratable benefit of the Holders of Securities and Coupons
in respect of which such judgment has been recovered.

        SECTION 506. Application of Money Collected. Any money collected by the
Trustee pursuant to this Article shall be applied in the following order, at the
date and dates fixed by the Trustee and, in case of the distribution of such
money on account of principal (or premium, if any) and interest and any
Additional Amounts, upon presentation of the Securities or Coupons, or any
thereof, as the case may be, and the notation thereon of the payment if only
partially paid and upon surrender thereof if fully paid:

                FIRST: To the payment of all amounts due to the Trustee and any
        predecessor Trustee under Section 606;

               SECOND: To the payment of the amounts then due and unpaid upon
        the Securities and Coupons for principal (and premium, if any) and
        interest and any Additional Amounts payable, in respect of which or for
        the benefit of which such money has been collected, ratably, without
        preference or priority of any kind, according to the aggregate amounts
        due and payable on such Securities and Coupons for principal (and
        premium, if any), interest and Additional Amounts, respectively; and

                THIRD: To the payment of the remainder, if any, to the Issuer.



                                       36
<PAGE>   45

        SECTION 507. Limitation on Suits. No Holder of any Security of any
series or any related Coupon shall have any right to institute any proceeding,
judicial or otherwise, with respect to this Indenture, or for the appointment of
a receiver or trustee, or for any other remedy hereunder, unless:

                (1) such Holder has previously given written notice to the
        Trustee of a continuing Event of Default with respect to the Securities
        of that series;

                (2) the Holders of not less than a majority in principal amount
        of the Outstanding Securities of that series shall have made written
        request to the Trustee to institute proceedings in respect of such Event
        of Default in its own name as Trustee hereunder;

                (3) such Holder or Holders have offered to the Trustee
        reasonable indemnity against the costs, expenses and liabilities to be
        incurred in compliance with such request;

                (4) the Trustee for 60 days after its receipt of such notice,
        request and offer of indemnity has failed to institute any such
        proceeding; and

                (5) no direction inconsistent with such written request has been
        given to the Trustee during such 60-day period by the Holders of a
        majority in principal amount of the Outstanding Securities of that
        series;

it being understood and intended that no one or more of such Holders shall have
any right in any manner whatever by virtue of, or by availing of, any provision
of this Indenture to affect, disturb or prejudice the rights of any other of
such Holders, or to obtain or to seek to obtain priority or preference over any
other of such Holders or to enforce any right under this Indenture, except in
the manner herein provided and for the equal and ratable benefit of all such
Holders.

        SECTION 508. Unconditional Right of Holders to Receive Principal,
Premium, if any, Interest and Additional Amounts. Notwithstanding any other
provision in this Indenture, the Holder of any Security or Coupon shall have the
right which is absolute and unconditional to receive payment of the principal of
(and premium, if any) and (subject to Sections 305 and 307) interest on, and any
Additional Amounts in respect of, such Security or payment of such Coupon on the
respective due dates expressed in such Security or Coupon (or, in the case of
redemption, on the Redemption Date) and to institute suit for the enforcement of
any such payment, and such rights shall not be impaired without the consent of
such Holder.

        SECTION 509. Restoration of Rights and Remedies. If the Trustee or any
Holder of a Security or Coupon has instituted any proceeding to enforce any
right or remedy under this Indenture and such proceeding has been discontinued
or abandoned for any reason, or has been determined adversely to the Trustee or
to such Holder, then and in every such case the Issuer, the Trustee and the
Holders of Securities and coupons shall, subject to any determination in such
proceeding, be restored severally and respectively to their former position
hereunder and thereafter all rights and remedies of the Trustee and the Holders
shall continue as though no such proceeding had been instituted.



                                       37
<PAGE>   46

        SECTION 510. Rights and Remedies Cumulative. Except as otherwise
provided with respect to the replacement or payment of mutilated, destroyed,
lost or stolen Securities or Coupons in the last paragraph of Section 306, no
right or remedy herein conferred upon or reserved to the Trustee or to the
Holders of Securities or Coupons is intended to be exclusive of any other right
or remedy, and every right and remedy shall, to the extent permitted by law, be
cumulative and in addition to every other right and remedy given hereunder or
now or hereafter existing at law or in equity or otherwise. The assertion or
employment of any right or remedy hereunder, or otherwise, shall not prevent the
concurrent assertion nor employment of any other appropriate right or remedy.

        SECTION 511. Delay or Omission Not Waiver. No delay or omission of the
Trustee or of any Holder of any Security or Coupon to exercise any right or
remedy accruing upon any Event of Default shall impair any such right or remedy
or constitute a waiver of any such Event of Default or an acquiescence therein.
Every right and remedy given by this Article or by law to the Trustee or to the
Holders may be exercised from time to time, and as often as may be deemed
expedient, by the Trustee or by the Holders of Securities or Coupons, as the
case may be.

        SECTION 512. Control by Holders of Securities. The Holders of not less
than a majority in principal amount of the Outstanding Securities of any series
shall 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 Securities of such series,
provided that:

                (1) such direction shall not be in conflict with any rule of law
        or with this Indenture,

                (2) the Trustee may take any other action deemed proper by the
        Trustee which is not inconsistent with such direction, and

                (3) the Trustee need not take any action which might expose it
        to personal liability, without the receipt of reasonable indemnity from
        Holders requesting such action, or be unduly prejudicial to the Holders
        of Securities of such series not joining therein.

        SECTION 513. Waiver of Past Defaults. The Holders of not less than a
majority in principal amount of the Outstanding Securities of any series may on
behalf of the Holders of all the Securities of such series and any related
coupons waive any past default hereunder with respect to such series and its
consequences, except a default

                (1) in the payment of the principal of (or premium, if any) or
        interest on or Additional Amounts payable in respect of any Security of
        such series or any related Coupons, or

                (2) in respect of a covenant or provision hereof which under
        Article Nine cannot be modified or amended without the consent of the
        Holder of each Outstanding Security of such series affected.



                                       38
<PAGE>   47

        Upon any such waiver, such default shall cease to exist, and any Event
of Default arising therefrom shall be deemed to have been waived, for every
purpose of this Indenture; but no such waiver shall extend to any subsequent or
other default or Event of Default or impair any right consequent thereon.

        SECTION 514. Waiver of Usury, Stay or Extension Laws. The Issuer
covenants (to the extent that it may lawfully do so) that it will not at any
time insist upon, or plead, or in any manner whatsoever claim or take the
benefit or advantage of, any usury, stay or extension law wherever enacted, now
or at any time hereafter in force, which may affect the covenants or the
performance of this Indenture; and the Issuer (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such
law, and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

        SECTION 515. Undertaking for Costs. All parties to this Indenture
acknowledge, and each Holder of any Security by his acceptance thereof shall be
deemed to have acknowledged, that any court may in its discretion require, in
any suit for the enforcement of any right or remedy under this Indenture, or in
any suit against the Trustee for any action taken or omitted by it as Trustee,
the filing by any party litigant in such suit of an undertaking to pay the costs
of such suit, and that such court may in its discretion assess reasonable costs,
including reasonable attorneys' fees, against any party litigant in such suit
having due regard to the merits and good faith of the claims or defenses made by
such party litigant; but the provisions of this section shall not apply to any
suit instituted by the Trustee, to any suit instituted by any Holder, or group
of Holders, holding in the aggregate more than a majority in principal amount of
the Outstanding Securities, or to any suit instituted by any Holder for the
enforcement of the payment of the principal of (or premium, if any) or interest
on any Security on or after the respective Maturities expressed in such Security
(or, in the case of redemption, on or after the Redemption Date).

                                  ARTICLE SIX

                                   THE TRUSTEE

        SECTION 601. Notice of Defaults. Within 90 days after the occurrence of
any default hereunder with respect to the Securities of any series, the Trustee
shall transmit in the manner and to the extent provided in TIA Section 313(c),
notice of such default hereunder known to the Trustee, unless such default shall
have been cured or waived; provided, however, that, except in the case of a
default in the payment of the principal of (or premium, if any) or interest on
or any Additional Amounts or sinking fund installment with respect to the
Securities of such series, the Trustee shall be protected in withholding such
notice if and so long as Responsible Officers of the Trustee in good faith
determine that the withholding of such notice is in the interest of the Holders
of the Securities and Coupons of such series; and provided further that in the
case of any default or breach of the character specified in Section 501(4) with
respect to the Securities and coupons of such series, no such notice to Holders
shall be given until at least 60 days after the occurrence thereof. For the
purpose of this Section, the term "default" means any event which is,



                                       39
<PAGE>   48
or after notice or lapse of time or both would become, an Event of Default with
respect to the Securities of such series.

        SECTION 602. Certain Rights of Trustee.

                (1) the Trustee may rely and shall be protected in acting or
        refraining from acting upon any resolution, certificate, statement,
        instrument, opinion, report, notice, request, direction, consent, order,
        bond, debenture, note, coupon or other paper or document believed by it
        to be genuine and to have been signed or presented by the proper party
        or parties;

                (2) any request or direction of the Issuer mentioned herein
        shall be sufficiently evidenced by an Issuer Request or Issuer Order
        (other than delivery of any Security, together with any coupons
        appertaining thereto, to the Trustee for authentication and delivery
        pursuant to Section 303 which shall be sufficiently evidenced as
        provided therein) and any resolution of the Board of Directors may be
        sufficiently evidenced by a Board Resolution;

                (3) whenever in the administration of this Indenture the Trustee
        shall deem it desirable that a matter be proved or established prior to
        taking, suffering or omitting to take any action hereunder, the Trustee
        (unless other evidence be herein specifically prescribed) may, in the
        absence of bad faith on its part, rely upon an Officers' Certificate;

                (4) the Trustee may consult with counsel and the advice of such
        counsel or any Opinion of Counsel shall be full and complete
        authorization and protection in respect of any action taken, suffered or
        omitted by it hereunder in good faith and in reliance thereon;

                (5) the Trustee shall be under no obligation to exercise any of
        the rights or powers vested in it by this Indenture at the request or
        direction of any of the Holders of Securities of any series or any
        related Coupons pursuant to this Indenture, unless such Holders shall
        have offered to the Trustee reasonable security or indemnity against the
        costs, expenses and liabilities which might be incurred by it in
        compliance with such request or direction;

                (6) the Trustee shall not be bound to make any investigation
        into the facts or matters stated in any resolution, certificate,
        statement, instrument, opinion, report, notice, request, direction,
        consent, order, bond, debenture, note, coupon or other paper or
        document, but the Trustee, in its discretion, may make such further
        inquiry or investigation into such facts or matters as it may see fit,
        and, if the Trustee shall determine to make such further inquiry or
        investigation, it shall be entitled to examine the books, records and
        premises of the Issuer, personally or by agent or attorney;

                (7) the Trustee may execute any of the trusts or powers
        hereunder or perform any duties hereunder either directly or by or
        through agents or attorneys and the Trustee



                                       40
<PAGE>   49

        shall not be responsible for any misconduct or negligence on the part of
        any agent or attorney appointed with due care by it hereunder;

                (8) the Trustee shall not be liable for any action taken,
        suffered or omitted by it in good faith and reasonably believed by it to
        be authorized or within the discretion or rights or powers conferred
        upon it by this Indenture; the Trustee shall not be liable in connection
        with the performance of its duties hereunder, except for its own
        negligence or intentional misconduct, and

                (9) the Trustee shall not be deemed to have notice of any Event
        of Default or default or other fact or circumstance upon the occurrence
        of which it may be required to take action hereunder unless a
        Responsible Officer of the Trustee has actual knowledge of such event,
        fact or circumstance or unless written notice of any such event is
        received by the Trustee at its Corporate Trust Office. In the absence of
        such actual knowledge or notice, the Trustee may conclusively assume
        that no default has occurred and is continuing under this Indenture.
        Except as otherwise expressly provided herein, the Trustee shall not be
        bound to ascertain or inquire as to the performance of observance of any
        of the terms, conditions, covenants or agreements herein or of any of
        the documents executed in connection with the Securities or as to the
        existence of an Event of Default thereunder.

                (10) The Trustee shall, prior to the occurrence of an Event of
        Default and after the curing of all Events of Default which may have
        occurred, perform such duties and only such duties as are specifically
        set forth in this Indenture and no implied covenants, duties or
        obligations shall be read into this Indenture against the Trustee. The
        Trustee shall, during the existence of any event of Default (which has
        not been cured), exercise such of the rights and powers vested in it by
        this Indenture, and use the same degree of care and skill in their
        exercise, as a prudent man would exercise or use under the circumstances
        in the conduct of his own affairs.

                (11) The Trustee shall not be liable for any error of judgment
        made by a responsible employee or officer, unless the Trustee shall have
        been negligent in ascertaining the pertinent facts, or such responsible
        employee or officer was negligent in making such error or such error was
        made intentionally.

                (12) The permissive Rights of the Trustee to do things
        enumerated in this Indenture shall not be construed as a duty unless so
        specified herein.

                (13) The Trustee shall not be liable with respect to any action
        taken or omitted to be taken by it in accordance with the direction of
        the Holders of not less than a majority in aggregate principal amount of
        any series of Securities issued hereunder at the time Outstanding
        relating to the time, method and place of conducting any proceeding for
        any remedy available to the Trustee or exercising any trust or power
        conferred upon the Trustee under this Indenture with respect to such
        series of Securities.



                                       41
<PAGE>   50

                (14) All indemnifications and releases from liability granted
        herein to the Trustee shall extend to the directors, officers, employees
        and agents of the Trustee and to the Paying Agent and Registrar. Whether
        or not expressly so provided, every provision of this Indenture relating
        to the conduct or affecting the liability of the Trustee shall be
        subject to the provisions of this Article Six.

               The Trustee shall not be required to expend or risk its own funds
or otherwise incur any financial liability in the performance of any of its
duties hereunder, or in the exercise of any of its rights or powers.

        SECTION 603. Not Responsible for Recitals or Issuance of Securities. The
recitals contained herein and in the Securities, except the Trustee's
certificate of authorization, and in any Coupons shall be taken as the
statements of the Issuer and neither the Trustee nor any Authenticating Agent
assumes any responsibility for their correctness. The Trustee makes no
representations as to the validity, sufficiency or priority of this Indenture or
of the Securities or Coupons, except that the Trustee represents that it is duly
authorized to execute and deliver this Indenture, authenticate the Securities
and perform its obligations hereunder. Neither the Trustee nor the
Authenticating Agent shall be accountable for the use or application by the
Issuer of Securities or the proceeds thereof.

        SECTION 604. May Hold Securities. The Trustee, any Paying Agent,
Security Registrar, Authenticating Agent or any other agent of the Issuer, in
its individual or any other capacity, may become the owner or pledgee of
Securities and Coupons and, subject to TIA Sections 310(b) and 311, may
otherwise deal with the Issuer with the same rights it would have if it were not
Trustee, Paying Agent, Security Registrar, Authenticating Agent or such other
agent.

        SECTION 605. Money Held in Trust. Money held by the Trustee in trust
hereunder need not be segregated from other funds except to the extent required
by law. The Trustee shall be under no liability for interest on any money
received by it hereunder except as otherwise agreed with the Issuer.

        SECTION 606. Compensation and Reimbursement. The Issuer agrees:

                (1) to pay to the Trustee from time to time reasonable
        compensation for all services rendered by it hereunder (which
        compensation shall not be limited by any provision of law in regard to
        the compensation of a trustee of an express trust);

                (2) except as otherwise expressly provided herein, to reimburse
        each of the Trustee and any predecessor Trustee upon its request for all
        reasonable expenses, disbursements and advances incurred or made by the
        Trustee in accordance with any provision of this Indenture (including
        the reasonable compensation and the expenses and disbursements of its
        agents and counsel), except any such expense, disbursement or advance as
        may be attributable to Trustee's negligence or bad faith; and

                (3) to indemnify each of the Trustee and any predecessor Trustee
        for, and to hold it harmless against, any loss, liability or expense
        (including the reasonable



                                       42
<PAGE>   51

        compensation and the expenses and disbursements of its agents and
        counsel) incurred without negligence or bad faith on its own part,
        arising out of or in connection with the acceptance or administration of
        the trust or trusts hereunder, including the costs and expenses of
        defending itself against any claim or liability in connection with the
        exercise or performance of any of its powers or duties hereunder.

        When the Trustee incurs expenses or renders services in connection with
an Event of Default specified in Section 501(6) or (7), the expenses (including
the reasonable charges and expenses of its counsel) and the compensation for the
services are intended to constitute expenses of administration under any
applicable Federal or state bankruptcy, insolvency or other similar law.

        As security for the performance of the obligations of the Issuer under
this Section, the Trustee shall have a lien prior to the Securities upon all
property and funds held or collected by the Trustee as such, except funds held
in trust for the payment of principal of (or premium, if any) or interest on
particular Securities or Coupons under Section 401 or Article Fourteen.

        The provisions of this Section shall survive the termination of this
Indenture.

        SECTION 607. Corporate Trustee Required; Eligibility; Conflicting
Interests. There shall at all times be a Trustee hereunder which shall be
eligible to act as Trustee under TIA Section 310(a)(1) and shall have (or, in
the case of a corporation included in a bank holding company system, the related
bank holding company shall have) a combined capital and surplus of at least
$50,000,000. If such corporation or holding company publishes reports of
condition at least annually, pursuant to law or the requirements Federal, state,
Territorial or District of Columbia supervising or examining authority, then for
the purposes of this Section, the combined capital and surplus of such
corporation or holding company shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. If at
any time the Trustee shall cease to be eligible in accordance with the
provisions of this Section, it shall resign immediately in the manner and with
the effect hereinafter specified in this Article.

        SECTION 608. Resignation and Removal; Appointment of Successor.

        (a) No resignation or removal of the Trustee and no appointment of a
successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 609.

        (b) The Trustee may resign at any time with respect to the Securities of
one or more series by giving written notice thereof to the Issuer. If an
instrument of acceptance by a successor Trustee shall not have been delivered to
the Trustee within 30 days after the giving of such notice of resignation, the
resigning Trustee may petition any court of competent jurisdiction for the
appointment of a successor Trustee.

        (c) The Trustee may be removed at any time with respect to the
Securities of any series by Act of the Holders of a majority in principal amount
of the Outstanding Securities of such series delivered to the Trustee and to the
Issuer.



                                       43
<PAGE>   52

        (d) If at any time:

                (1) the Trustee shall fail to comply with the provisions of TIA
        Section 310(b) after written request therefor by the Issuer or by any
        Holder of a Security who has been a bona fide Holder of a Security for
        at least six months, or

                (2) the Trustee shall cease to be eligible under Section 607 and
        shall fail to resign after written request therefor by the Issuer or by
        any Holder of a Security who has been a bona fide Holder of a Security
        for at least six months, or

                (3) the Trustee shall become incapable of acting or shall be
        adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
        property shall be appointed or any public officer shall take charge or
        control of the Trustee or of its property or affairs for the purpose of
        rehabilitation, conservation or liquidation,

then, in any such case, (i) the Issuer by or pursuant to a Board Resolution may
remove the Trustee and appoint a successor Trustee with respect to all
Securities, or (ii) subject to TIA Section 315(e), any Holder of a Security who
has been a bona fide Holder of a Security for at least six months may, on behalf
of himself and all others similarly situated, petition any court of competent
jurisdiction for the removal of the Trustee with respect to all Securities and
the appointment of a successor Trustee or Trustees.

        (e) If the Trustee shall resign, be removed or become incapable of
acting, or if a vacancy shall occur in the office of Trustee for any reason with
respect to the Securities of one or more series, the Issuer, by or pursuant to a
Board Resolution, shall promptly appoint a successor Trustee or Trustees with
respect to the Securities of that or those series (it being understood that any
such successor Trustee may be appointed with respect to the Securities of one or
more or all of such series and that at any time there shall be only one Trustee
with respect to the Securities of any particular series). If, within one year
after such resignation, removal or incapability, or the occurrence of such
vacancy, a successor Trustee with respect to the Securities of any series shall
be appointed by Act of the Holders of a majority in principal amount of the
Outstanding Securities of such series delivered to the Issuer and the retiring
Trustee, the successor Trustee so appointed shall, forthwith upon its acceptance
of such appointment, become the successor Trustee with respect to the Securities
of such series and to that extent supersede the successor Trustee appointed by
the Issuer. If no successor Trustee with respect to the Securities of any series
shall have been so appointed by the Issuer or the holders of Securities and
accepted appointed by the Issuer or Holders of Securities and accepted
appointment in the manner hereinafter provided any Holder of a Security who has
been a bona fide Holder of a Security of such series for at least six months
may, on behalf of himself and all others similarly situated, petition any court
of competent jurisdiction for the appointment of a successor Trustee with
respect to Securities of such series.

        (f) The Issuer shall give notice of each resignation and each removal of
the Trustee with respect to the Securities of any series and each appointment of
a successor Trustee with respect to the Securities of any series in the manner
provided for notices to the Holders of



                                       44
<PAGE>   53
Securities in Section 106. Each notice shall include the name of the successor
Trustee with respect to the Securities of such series and the address of its
Corporate Trust Office.

        SECTION 609. Acceptance of Appointment by Successor.

        (a) In case of the appointment hereunder of a successor Trustee with
respect to all Securities, every such successor Trustee shall execute,
acknowledge and deliver to the Issuer and to the retiring Trustee an instrument
accepting such appointment, and thereupon the resignation or removal of the
retiring Trustee shall become effective and such successor Trustee, without any
further act, deed or conveyance, shall become vested with all the rights,
powers, trusts and duties of the retiring Trustee; but, upon request of the
Issuer or the successor Trustee, such retiring Trustee shall, upon payment of
its charges, execute and deliver an instrument transferring to such successor
trustee all the rights, powers and trusts of the retiring Trustee, and shall
duly assign, transfer and deliver to such successor Trustee all property and
money held by such retiring Trustee hereunder, subject nevertheless to its
claim, if any, provided for in Section 606.

        (b) In case of the appointment hereunder of a successor Trustee with
respect to the Securities of one or more (but not all) series, the Issuer, the
retiring Trustee and each successor Trustee with respect to the Securities of
one or more series shall execute and deliver an indenture supplemental hereto,
pursuant to Article Nine hereof, wherein each successor Trustee shall accept
such appointment and which (1) shall contain such provisions as shall be
necessary or desirable to transfer and confirm to, and to vest in, each
successor Trustee all the rights, powers, trusts and duties of the retiring
Trustee with respect to the Securities of that or those series to which the
appointment of such successor Trustee relates, (2) if the retiring Trustee is
not retiring with respect to all Securities, shall contain such provisions as
shall be deemed necessary or desirable to confirm that all the rights, powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series as to which the retiring Trustee with respect to the Securities
of that or those series as to which the retiring Trustee is not retiring shall
continue to be vested in the retiring Trustee, and (3) shall add to or change
any of the provisions of this Indenture as shall be necessary to provide for or
facilitate the administration of the trusts hereunder by more than one Trustee,
it being understood that nothing herein or in such supplemental indenture shall
constitute such Trustees co-trustees of the same trust and that each such
Trustee shall be trustee of a trust or trusts hereunder separate and apart from
any trust or trusts hereunder separate and apart from any trust or trusts
hereunder administered by any other such Trustee; and upon the execution and
delivery of such supplemental indenture the resignation or removal of the
retiring Trustee shall become effective to the extent provided therein and each
such successor Trustee, without any further act, deed or conveyance, shall
become vested with all the right, powers, trusts and duties of the retiring
Trustee with respect to the Securities of that or those series to which the
appointment of such successor Trustee relates; but, on request of the Issuer or
any successor Trustee, such retiring Trustee shall duly assign, transfer and
deliver to such successor Trustee all property and money held by such retiring
Trustee hereunder with respect to the Securities of that or those series to
which the appointment of such successor Trustee relates.

        (c) Upon request of any such successor Trustee, the Issuer shall execute
any and all instruments for more fully and certainly vesting in, and confirming
to such successor Trustee all



                                       45
<PAGE>   54
such rights, powers and trusts referred to in paragraph (a) or (b) of this
section, as the case may be.

        (d) No successor Trustee shall accept its appointment unless at the time
of such acceptance such successor Trustee shall be qualified and eligible under
this Article.

        SECTION 610. Merger, Conversion, Consolidation or Succession to
Business. Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all of the corporate trust
business of the Trustee, shall be the successor of the Trustee hereunder,
provided such corporation shall be otherwise qualified and eligible under this
Article, without the execution or filing of any paper or any further act on the
part of any of the parties hereto. In case any Securities or coupons shall have
been authenticated, but not delivered, by the Trustee then in office, any
successor by merger, conversion or consolidation to such authenticating Trustee
may adopt such authentication and deliver the Securities or coupons so
authenticated with the same effect as if such successor Trustee had itself
authenticated such Securities or coupons. In case any Securities or coupons
shall not have been authenticated by such predecessor Trustee, any such
successor Trustee may authenticate and deliver such Securities or coupons, in
either its own name or that of its predecessor Trustee, with the full force and
effect which this Indenture provides for the certificate of authentication of
the Trustee.

        SECTION 611. Appointment of Authentication Agent. At any time when any
of the Securities remain Outstanding, the Trustee may appoint an Authenticating
Agent or Agents with respect to one or more series of Securities which shall be
authorized to act on behalf of the Trustee to authenticate Securities of such
series issued upon exchange, registration of transfer or partial redemption or
repayment thereof, and Securities so authenticated shall be entitled to the
benefits of this Indenture and shall be valid and obligatory for all purposes as
if authenticated by the trustee hereunder. Any such appointment shall be
evidenced by an instrument in writing signed by a Responsible Officer of the
Trustee, a copy of which instruction shall be promptly furnished to the Issuer.
Wherever reference is made in this Indenture to the authentication and delivery
of Securities by the Trustee or the Trustee's certificate of authentication,
such reference shall be deemed to include authentication and delivery on behalf
of the Trustee by an Authenticating Agent and a certificate of authentication
executed on behalf of the Trustee by an Authenticating Agent. Each
Authenticating Agent shall be acceptable to the Issuer and, except as may
otherwise be provided pursuant to Section 301, shall at all times be a bank or
trust or corporation organized and doing business and in good standing under the
laws of the United States of America or of any State or the District of
Columbia, authorized under such laws to act as Authenticating Agent, having a
combined capital and surplus of not less than $50,000,000 and subject to
supervision or examination by federal or state authorities. If such
Authenticating Agent publishes reports of condition at least annually, pursuant
to law or the requirements of the aforesaid supervising or examining authority,
then for the purposes of this Section, the combined capital and surplus of such
Authenticating Agent shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published. In case at any
time an Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section,



                                       46
<PAGE>   55

such Authenticating Agent shall resign immediately in the manner and with the
effect specified in this Section.

        Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided such corporation shall be otherwise eligible
under this Section, without the execution or filing of any paper or further act
on the part of the Trustee or the Authenticating Agent.

        An Authenticating Agent for any series of Securities may at any time
resign by giving written notice of resignation to the Trustee for such series
and to the Issuer. The Trustee for any series of Securities may at any time
terminate the agency of an Authenticating Agent by giving written notice of
termination to such Authenticating Agent and to the Issuer. Upon receiving such
a notice of resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee for such series may appoint a successor
Authenticating Agent which shall be acceptable to the Issuer and shall give
notice of such appointment to all Holders of Securities of the series with
respect to which such Authenticating Agent will service in the manner set forth
in Section 106. Any successor Authenticating Agent upon acceptance of its
appointment hereunder shall become vested with all the rights, powers and duties
of its predecessor hereunder, with like effect as if originally named as an
Authenticating Agent herein. No successor Authenticating Agent shall be
appointed unless eligible under the provisions of this Section.

        The Issuer agrees to pay to each Authenticating Agent from time to time
reasonable compensation including reimbursement of its reasonable expenses for
its services under this Section.

        If an appointment with respect to one or more series is made pursuant to
this Section, the Securities of such series may have endorsed thereon, in
addition to or in lieu of the Trustee's certificate of authentication, an
alternate certificate of authentication substantially in the following form:

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


                    ____________________________________
                             as Trustee

                    By:_________________________________
                          as Authenticating Agent

                    By:_________________________________
                             Authorized Officer



                                       47
<PAGE>   56

                                 ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND ISSUER

        SECTION 701. Disclosure of Names and Addresses of Holders. Every Holder
of Securities or Coupons, by receiving and holding the same, agrees with the
Issuer and the Trustee that neither the Issuer nor the Trustee nor any
Authenticating Agent nor any Paying Agent nor any Security Registrar shall be
held accountable by reason of the disclosure of any information as to the names
and addresses of the Holders of Securities in accordance with TIA Section 312,
regardless of the source from which such information was derived, and that the
Trustee shall not be held accountable by reason of mailing any material pursuant
to a request made under TIA Section 312(b).

        SECTION 702. Reports by Trustee. Within 60 days after June 15 of each
year commencing with the first June 15 after the issuance of Securities pursuant
to this Indenture, the Trustee shall transmit by mail to all Holders of
Securities as provided in TIA Section 313(c) a brief report dated as of such
June 15, if required by TIA Section 313(a).

        SECTION 703. Reports by Issuer. The Issuer will:

                (1) file with the Trustee, within 15 days after the Issuer is
        required to file the same with the Commission, copies of the annual
        reports and of the information documents and other reports (or copies of
        such portions of any of the foregoing as the Commission may from time to
        time by rules and regulations prescribed) which the Issuer may be
        required to file with the Commission pursuant to Section 13 or Section
        15(d) of the Securities Exchange Act of 1934; or, if the Issuer is not
        required to file information, documents or reports pursuant to either of
        such Sections, then it will file with the Trustee and the Commission, in
        accordance with rules and regulations prescribed from time to time by
        the Commission, such of the supplementary and periodic information,
        documents and reports which may be required pursuant to Section 13 of
        the Securities Exchange Act of 1934 in respect of a security listed and
        registered on a national securities exchange as may be prescribed from
        time to time in such rules and regulations;

                (2) file with the Trustee and the Commission, in accordance with
        rules and regulations prescribed from time to time by the Commission,
        such additional information, documents and reports with respect to
        compliance by the Issuer with the conditions and covenants of this
        Indenture as may be required from time to time by such rules and
        regulations; and

                (3) transmit by mail to the Holders of Securities, within 30
        days after the filing hereof with the Trustee, in the manner and to the
        extent provided in TIA Section 313(c), such summaries of any
        information, documents and reports required to be filed by the Issuer
        pursuant to paragraphs (1) and (2) of this section as may be required by
        rules and regulations prescribed from time to time by the Commission.



                                       48
<PAGE>   57

        SECTION 704. Issuer to Furnish to Trustee Names and Addresses of
Holders. The Issuer will furnish or cause to be furnished to the Trustee:

        (a) semi-annually, not later than 25 days after the Regular Record Date
for interest for each series of Securities, a list, in such form as the Trustee
may reasonably require, of the names and addresses of the Holders of Registered
Securities of such series as of such Regular Record Date, or if there is no
Regular Record Date for interest for such series of Securities, semi-annually,
upon such dates as are set forth in the Board Resolution or indenture
supplemental hereto authorizing such series, and

        (b) at such other times as the Trustee may request in writing, within 30
days after the receipt by the Issuer of any such request, a list of similar form
and content as of a date not more than 15 days prior to the time such list is
furnished, provided, however, that, so long as the Trustee is the Security
Registrar, no such list shall be required to be furnished.

                                 ARTICLE EIGHT

                CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

        SECTION 801. Consolidation and Merger of Issuer and Sale, Lease and
Conveyance Permitted Subject to Certain Conditions. The Issuer may consolidate
with, or sell, lease or convey all or substantially all of its assets to, or
merge with or into any other Person, provided that in any such case, (i) either
the Issuer shall be the continuing Person, or the successor (if other than the
Issuer) formed by or resulting from any such consolidation or merger or which
shall have received the transfer of such assets shall expressly assume the due
and punctual payment of the principal of (and premium, if any) and any interest
(including all Additional Amounts, if any, payable pursuant to Section 1009) on
all of the Securities, according to their tenor, and the due and punctual
performance and observance of all of the covenants and conditions of this
Indenture to be performed by the Issuer by supplemental indenture, complying
with Article Nine thereof, executed and delivered to the Trustee by such Person,
and (ii) immediately after giving effect to such transaction and treating any
indebtedness which becomes an obligation of the Issuer or any Subsidiary as a
result thereof as having been incurred by the Issuer or such Subsidiary at the
time of such transaction, no Event of Default, and no event which, after notice
or the lapse of time, or both, would become an Event of Default, shall have
occurred and be continuing.

        SECTION 802. Rights and Duties of Successor Person. In case of any such
consolidation, merger, sale, lease or conveyance and upon any such assumption by
the successor Person, such successor Person shall succeed to and be substituted
for the Issuer, with the same effect as if it had been named herein as the party
of the first part, and the predecessor Person, except in the event of a lease,
shall be relieved of any further obligation under this Indenture and the
Securities. Such successor Person thereupon may cause to be signed, and may
issue either in its own name or in the name of the Issuer, any and all of the
Securities issuable hereunder which theretofore shall not have been signed by
the Issuer and delivered to the Trustee; and, upon the order of such successor
Person, instead of the Issuer, and subject to all the terms, conditions and
limitations in this Indenture prescribed, the Trustee shall authenticate and
shall deliver any securities which previously shall have been signed and
delivered by the officers of the Issuer to



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<PAGE>   58
the Trustee for authentication, and any Securities which such successor Person
thereafter shall cause to be signed and delivered to the Trustee for that
purpose. All the Securities so issued shall in all respects have the same legal
rank and benefit under this Indenture as the Securities theretofore or
thereafter issued in accordance with the terms of this Indenture as though all
of such Securities had been issued at the date of the execution hereof.

        In case of any such consolidation, merger, sale, lease or conveyance,
such changes in phraseology and form (but not in substance) may be made in the
Securities thereafter to be issued as may be appropriate.

        SECTION 803. Officers' Certificate and Opinion of Counsel. Any
consolidation, merger, sale, lease or conveyance permitted under Section 801 is
also subject to the condition that the Trustee receive an Officers' Certificate
and an Opinion of Counsel to the effect that any such consolidation, merger,
sale, lease or conveyance, and the assumption of the Issuer's obligation under
this Indenture by any successor Person (through a supplemental indenture hereto
in accordance with Section 901), complies with the provisions of this Article
and that all conditions precedent herein provided for relating to such
transaction have been complied with.

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

        SECTION 901. Supplemental Indentures Without Consent of Holders. Without
the consent of any Holders of Securities or Coupons, the Issuer, when authorized
by or pursuant to the corporate formation documents of the Issuer and Board
Resolution of the Issuer, and the Trustee, at any time and from time to time,
may enter into one or more indentures supplemental hereto, for any of the
following purposes:

                (1) to evidence the succession of another Person to the Issuer
        and the assumption by any such successor of the covenants of the Issuer
        herein and in the Securities contained; or

                (2) to add to the covenants of the Issuer for the benefit of the
        Holders of all or any series of Securities (and if such covenants are to
        be for the benefit of less than all series of Securities, stating that
        such covenants are expressly being included solely for the benefit of
        such series) or to surrender any right or power herein conferred upon
        the Issuer; or

                (3) to add any additional Events of Default for the benefit of
        the Holders of all or any series of Securities (and if such Events of
        Default are to be for the benefit of less than all series of Securities,
        stating that such Events of Default are expressly being included solely
        for the benefit of such series); provided, however, that in respect of
        any such additional Events of Default such supplemental indenture may
        provide for a particular period of grace after default (which period may
        be shorter or longer than that allowed in the case of other defaults) or
        may provide for an immediate enforcement upon such default or may limit
        the immediate enforcement upon such default or may limit the



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<PAGE>   59

        remedies available to the Trustee upon such default or may limit the
        right of the Holders of that or those series of Securities to which such
        additional Events of Default apply to waive such default; or

                (4) to add to or change any of the provisions of this Indenture
        to provide that Bearer Securities may be registerable as to principal,
        to change or eliminate any restrictions on the payment of principal of
        or any premium or interest on Bearer Securities, to permit Bearer
        Securities to be issued in exchange for Registered Securities, to permit
        Bearer Securities to be issued in exchange for Bearer Securities of
        other authorized denominations or to permit or facilitate the issuance
        of Securities in uncertificated form, provided, that any such action
        shall not adversely affect the interests of the Holders of Securities of
        any series or any related coupons in any material respect; or

                (5) to change or eliminate any of the provisions of this
        Indenture, provided that any such change or elimination shall become
        effective only when there is no Security Outstanding of any series
        created prior to the execution of such supplemental indenture which is
        entitled to the benefit of such provision; or

                (6) to secure the Securities; or

                (7) to establish the form or terms of Securities of any series
        and any related Coupons as permitted by Sections 202 and 301, including
        the provisions and procedures relating to Securities convertible into
        Common Stock or Preferred Stock of the Issuer; or

                (8) to evidence and provide for the acceptance of appointment
        hereunder by a successor Trustee with respect to the Securities of one
        or more series and to add to or change any of the provisions of this
        Indenture as shall be necessary to provide for or facilitate the
        administration of the trusts hereunder by more than one Trustee; or

                (9) to cure any ambiguity, to correct or supplement any
        provision herein which may be defective or inconsistent with any other
        provision herein, or to make any other provisions with respect to
        matters or questions arising under this Indenture which shall not be
        inconsistent with the provisions of this Indenture, provided such
        provisions shall not adversely affect the interests of the Holders of
        Securities of any series or any related Coupons in any material respect;
        or

                (10) to supplement any of the provisions of this Indenture to
        such extent as shall be necessary to permit or facilitate the defeasance
        and discharge of any series of Securities pursuant to Sections 401, 1402
        and 1403; provided that any such action shall not adversely affect the
        interests of the Holders of Securities of such series and any related
        Coupons or any other series of Securities in any material respect.

        SECTION 902. Supplemental Indentures with Consent of Holders. With the
consent of the Holders of not less than a majority in principal amount of all
Outstanding Securities of any series, by Act of said Holders delivered to the
Issuer and the Trustee, the Issuer when authorized



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<PAGE>   60
by or pursuant to a Board Resolution, and the Trustee may enter into an
indenture or indentures supplemental hereto for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
this Indenture, as it relates to such series or of modifying in any manner the
rights of the Holders of Securities of such series and any related Coupons under
this Indenture; provided, however, that no such supplemental indenture shall,
without the consent of the Holder of each Outstanding Security affected thereby:

                (1) change the Stated Maturity of the principal of (or premium,
        if any, on) or any installment of principal of or interest on, any
        Security; or reduce the principal amount thereof or the rate or amount
        of interest thereon or any Additional Amounts payable in respect
        thereof, or any premium payable upon the redemption thereof, or change
        any obligation of the Issuer to pay Additional Amounts pursuant to
        Section 1009 (except as contemplated by Section 801(i) and permitted by
        Section 901(1)), or reduce the amount of the principal of an Original
        Issue Discount Security that would be due and payable upon a declaration
        of acceleration of the Maturity thereof pursuant to Section 502 or the
        amount thereof pursuant to Section 502 or the amount thereof provable in
        bankruptcy pursuant to Section 504, or adversely affect any right of
        repayment at the option of the Holder of any Security, or change any
        Place of Payment where, or the currency or currencies, currency unit or
        units or composite currency or currencies in which, any Security or any
        premium or the interest thereon is payable, or impair the right to
        institute suit for the enforcement of any such payment on or after the
        Maturity thereof (or, in the case of redemption or repayment at the
        option of the Holder, on or after the Redemption Date or the Repayment
        Date, as the case may be), or

                (2) reduce the percentage in principal amount of the Outstanding
        Securities of any series, the consent of whose Holders is required for
        any such supplemental indenture, or the consent of whose Holders is
        required for any waiver with respect to such series (or compliance with
        certain provisions of this Indenture or certain defaults hereunder and
        their consequences) provided for in this Indenture, or reduce the
        requirement of Section 1504 for quorum or voting, or

                (3) modify any of the provisions of this Section, Section 513 or
        Section 1010, except to increase the required percentage to effect such
        action or to provide that certain other provisions of this Indenture
        cannot be modified or waived without the consent of the Holder of each
        Outstanding Security affected thereby.

        It shall not be necessary for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

        A supplemental indenture which changes or eliminates any covenant or
other provision of this Indenture which has expressly been included solely for
the benefit of one or more particular series of Securities, or which modifies
the rights of the Holders of Securities of such series with respect to such
covenant or other provision, shall be deemed not to affect the rights under this
Indenture of the Holders of Securities of any other series.



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<PAGE>   61

        SECTION 903. Execution of Supplemental Indentures. In executing, or
accepting the additional trusts created by, any supplemental indenture permitted
by this Article or the modification thereby of the trusts created by this
Indenture, the Trustee shall be entitled to receive, and shall be fully
protected in relying upon, an Opinion of Counsel stating that the execution of
such supplemental indenture is authorized or permitted by this Indenture and
that all conditions precedent for any supplemental indenture have been
satisfied. The Trustee may, but shall not be obligated to, enter into any such
supplemental indenture which affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

        SECTION 904. Effect of Supplemental Indentures. Upon the execution of a
supplemental indenture under this Article, this Indenture shall be modified in
accordance therewith and such supplemental indenture shall form a part of this
Indenture for all purposes; and every Holder of Securities theretofore or
thereafter authenticated and delivered hereunder and of any coupon appertaining
thereto shall be bound thereby.

        SECTION 905. Conformity with Trust Indenture Act. Every supplemental
indenture executed pursuant to this Article shall conform to the requirements of
the Trust Indenture Act as then in effect.

        SECTION 906. Reference in Securities to Supplemental Indentures.
Securities of any series authenticated and delivered after the execution of a
supplemental indenture pursuant to this Article may, and shall if required by
the Trustee, bear a notation in form approved by the Trustee as to any matter
provided for in such supplemental indenture. If the Issuer shall so determine,
new Securities of any series so modified as to conform, in the opinion of the
Trustee and the Issuer, to any such supplemental indenture may be prepared and
executed by the Issuer and authenticated and delivered by the Trustee in
exchange for Outstanding Securities of such series.

                                  ARTICLE TEN

                                    COVENANTS

        SECTION 1001. Payment of Principal, Premium, if any, Interest and
Additional Amounts. The Issuer covenants and agrees for the benefit of the
Holders of each series of Securities that it will duly and punctually pay the
principal of (and premium, if any) and interest on and any Additional Amounts
payable in respect of the Securities of that series in accordance with the terms
of such series of Securities, and Coupons appertaining thereto and this
Indenture. Unless otherwise specified as contemplated by Section 301 with
respect to any series of Securities, any interest due on and any Additional
Amounts payable in respect of Bearer Securities on or before Maturity, other
than Additional Amounts, if any, payable as provided in Section 1009 in respect
of principal of (or premium, if any, on) such a Security, shall be payable only
upon presentation and surrender of the several Coupons for such interest
installments as are evidenced thereby as they severally mature. Unless otherwise
specified with respect to Securities of any series pursuant to Section 301, at
the option of the Issuer, all payments of principal may be paid by check to the
registered Holder of the Registered Security or other person entitled thereto
against surrender of such Security.



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<PAGE>   62
        SECTION 1002. Maintenance of Office or Agency. If Securities of a series
are issuable only as Registered Securities, the Issuer shall maintain in each
Place of Payment for any series of Securities an office or agency where
Securities of that series may be presented or surrendered for payment or
conversion, where Securities of that series may be surrendered for registration
of transfer or exchange, and where notices and demands to or upon the Issuer in
respect of the Securities of that series and this Indenture may be served. If
Securities of a series are issuable as Bearer Securities, the Issuer will
maintain: (A) in the City of San Francisco or in the City of New York, an office
or agency where any Registered Securities of that series may be presented or
surrendered for payment or conversion, where any Registered Securities of that
series may be surrendered for registration of transfer, where Securities of that
series may be surrendered for exchange, where notices and demands to or upon the
Issuer in respect of the Securities of that series and this Indenture may be
served and where Bearer Securities of that series and related Coupons may be
presented or surrendered for payment or conversion in the circumstances
described in the following paragraph (and not otherwise); (B) subject to any
laws or regulations applicable thereto, in a Place of Payment for that series
which is located outside the United States, an office or agency where Securities
of that series and related Coupons may be presented and surrendered for payment
(including payment of any Additional Amounts payable on Securities of that
series pursuant to Section 1009) or conversion; provided, however, that if the
Securities of that series are listed on the Luxembourg Stock Exchange or an
other stock exchange located outside the United States and such stock exchange
shall so require, the Issuer will maintain a Paying Agent for the Securities of
that series in Luxembourg or any other required city located outside the United
States, as the case may be, so long as the Securities of that series are listed
on such exchange; and (C) subject to any laws or regulations applicable thereto,
in a Place of Payment for that series located outside the United States an
office or agency where any Registered Securities of that series may be
surrendered for registration of transfer, where Securities of that series may be
surrendered for exchange and where notices and demands to or upon the Issuer in
respect of the Securities of that series and this Indenture may be served. The
Issuer will give prompt written notice to the Trustee of the location, and any
change in the location, of each such office or agency. If at any time the Issuer
shall fail to maintain any such required office or agency or shall fail to
furnish the Trustee with the address thereto, such presentations, surrenders,
notices and demands may be made or served at the Corporate Trust Office of the
Trustee, except that Bearer Securities of that series and the related Coupons
may be presented and surrendered for payment (including payment of any
Additional Amounts payable on Bearer Securities of that series pursuant to
Section 1009) or conversion at the offices specified in the Security and the
Issuer hereby appoints the same as its agent to receive such respective
presentations, surrenders, notices and demands, and the Issuer hereby appoints
________________________ with an address at __________________________________,
its agent to receive all such presentations, surrenders, notices and demands.

        Unless otherwise specified with respect to any Securities pursuant to
Section 301, no payment of principal, premium or interest on or Additional
Amounts in respect of Bearer Securities shall be made at any office or agency of
the Issuer in the United States or 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; provided, however, that, if the Securities of a series are payable in
Dollars, payment of principal and any premium and interest on any Bearer
Security (including



                                       54
<PAGE>   63
any Additional Amounts Payable on Securities of such series pursuant to Section
1009) shall be made at the office of the Issuer's Paying Agent in the City of
San Francisco or in the City of New York, if (but only if) payment in Dollars of
the full amount of such principal, premium, interest or Additional Amounts, as
the case may be, at all offices or agencies outside the United States maintained
for such purpose by the Issuer in accordance with this Indenture, is illegal or
effectively precluded by exchange controls or other similar restrictions.

        The Issuer may from time to time designate one or more other offices or
agencies where the Securities of one or more series may be presented or
surrendered for any or all of such purposes, and may from time to time rescind
such designation; provided, however, that no such designation or rescission
shall in any manner relieve the Issuer of its obligation to maintain an office
or agency in accordance with the requirements set forth above for Securities of
any series for such purposes. The Issuer will give prompt written notice to the
Trustee of any such designation or rescission and of any change in the location
of any such other office or agency. Unless otherwise specified with respect to
any Securities pursuant to Section 301 with respect to a series of Securities,
the Issuer hereby designates as a Place of Payment for each series of Securities
the office or agency of the Issuer in the City of San Francisco, and initially
appoints ________________________ with an address at
____________________________________, as Paying Agent in such city and as its
agent to receive all such presentations, surrenders, notices and demands.

        Unless otherwise specified with respect to any Securities pursuant to
Section 302, if and so long as the Securities of any series (i) are denominated
in a Foreign Currency or (ii) may be payable in a Foreign Currency or so long as
it is required under any other provision of this Indenture, then the Issuer will
maintain with respect to each such series of Securities, or as so required, at
least one exchange rate agent.

        SECTION 1003. Money for Securities Payments to Be Held in Trust. If the
Issuer shall at any time act as its own Paying Agent with respect to any series
of any Securities and any related coupons, it will, by no later than 12 noon
Eastern Standard Time on the day prior to each due date of the principal of (and
premium, if any), or interest on or Additional Amounts in respect of, any of the
Securities of that series, segregate and holder in trust for the benefit of the
Persons entitled thereto a sum in the currency or currencies, currency unit or
units or composite currency or currencies in which the Securities of such series
are payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series) sufficient to pay the principal (and premium, if any)
or interest or Additional Amounts so becoming due until such sums shall be paid
to such Persons or otherwise disposed of as herein provided, and will promptly
notify the Trustee of its action or failure so to act.

        Whenever the Issuer shall have one or more Paying Agents for any series
of Securities and any related coupons, it will, on or before each due date of
the principal of (and premium, if any), or interest on or Additional Amounts in
respect of any Securities of that series, deposit with a Paying Agent a sum (in
the currency or currencies, currency unit or units or composite currency or
currencies described in the preceding paragraph) sufficient to pay the principal
(and premium, if any) or interest or Additional Amount, so becoming due, such
sum to be held in trust for the benefit of the Persons entitled to such
principal, premium or interest or Additional Amounts and



                                       55
<PAGE>   64
(unless such Paying Agent is the Trustee) the Issuer will promptly notify the
Trustee of its action or failure so to act.

        The Issuer will cause each Paying Agent other than the Trustee to
execute and deliver to the Trustee an instrument in which such Paying Agent
shall agree with the Trustee, subject to the provisions of this Section, that
such Paying Agent will:

                (1) hold all sums held by it for the payment of principal of
        (and premium, if any) or interest on Securities in trust for the benefit
        of the Persons entitled thereto until such sums shall be paid to such
        Persons or otherwise disposed of as herein provided;

                (2) give the Trustee notice of any default by the Issuer (or any
        other obligor upon the Securities) in the making of any such payment of
        principal (and premium, if any) or interest; and

                (3) at any time during the continuance of any such default, upon
        the written request of the Trustee, forthwith pay to the Trustee all
        sums so held in trust by such Paying Agent.

        The Issuer may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay, or
by Issuer Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Issuer or such Paying Agent, such sums to be held by the Trustee
upon the same terms as those upon which such sums were held by the Issuer or
such Paying Agent; and, upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further liability with respect to
such sums.

        Except as otherwise provided in the Securities of any series, any money
deposited with the Trustee or any Paying Agent, or then held by the Issuer in
trust for the payment of the principal of (and premium, if any) or interest on,
or any Additional Amounts in respect of, any Security of any series and
remaining unclaimed for two years after such principal (and premium, if any),
interest or Additional Amounts has become due and payable shall be paid to the
Issuer upon Issuer Request or (if then held by the Issuer) shall be discharged
from such trust; and the Holder of such Security shall thereafter, as an
unsecured general creditor, look only to the Issuer for payment of such
principal of (and premium, if any) or interest on, or any Additional Amounts in
respect of, such Security, without interest thereon, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Issuer as trustee thereof, shall thereupon cease; provided, however, that
the Trustee or such Paying Agent, before being required to make any such
repayment, may at the expense of the Issuer cause to be published once, in an
Authorized Newspaper, notice that such money remains unclaimed and that, after a
date specified therein, which shall not be less than 30 days from the date of
such publication, any unclaimed balance of such money then remaining will be
repaid to the Issuer.

        SECTION 1004. Existence. Subject to Article Eight, the Issuer will do or
cause to be done all things necessary to preserve and keep in full force and
effect its existence, rights (corporate and statutory) and franchises; provided,
however, that the Issuer shall not be required to preserve any right or
franchise if the Board shall determine that the preservation thereof is no




                                       56
<PAGE>   65

longer desirable in the conduct of the business of the Issuer and that the loss
thereof is not disadvantageous in any material respect to the Holders.

        SECTION 1005. Statement as to Compliance. The Issuer will deliver to the
Trustee, within 120 days after the end of each fiscal year, a brief certificate
from the principal executive officer, principal financial officer or principal
accounting officer of the General Partner as to his or her knowledge of the
Issuer's compliance with all conditions and covenants under this Indenture and
in the event of any noncompliance, specifying such noncompliance and the nature
and status thereof. For purposes of this Section 1005, such compliance shall be
determined without regard to any period of grace or requirement of notice under
this Indenture.

        SECTION 1006. Maintenance of Properties. The Issuer shall cause all of
its material properties used or useful in the conduct of its business or the
business of any Subsidiary to be maintained and kept in good condition, repair
and working order, all as in the judgment of the Issuer may be necessary so that
the business carried on in connection therewith may be properly and
advantageously conducted at all times; provided, however, notwithstanding
anything herein to the contrary, the Issuer and its Subsidiaries may sell or
otherwise dispose of any of their properties for value in the ordinary course of
business.

        SECTION 1007. Insurance. The Issuer shall cause each of its properties
and each of the properties of its Subsidiaries which are of an insurable nature
to be insured against loss of damage with insurers of recognized responsibility,
in commercially reasonable amounts and types.

        SECTION 1008. Payment of Taxes and Other Claims. The Issuer shall pay or
discharge or cause to be paid or discharged, before the same shall become
delinquent (i) all taxes, assessments and governmental charges levied or imposed
upon the Issuer or any Subsidiary or upon the income, profits or property of the
Issuer or any Subsidiary, and (ii) all lawful claims for labor, materials and
supplies which, if unpaid, might by law become a lien upon property of the
Issuer or any Subsidiary; provided, however, notwithstanding anything herein to
the contrary, the Issuer shall not be required to pay or discharge or cause to
be paid or discharged any tax, assessment, charge or claim whose amount or
applicability is being contested in good faith.

        SECTION 1009. Additional Amounts. If any Securities of a series provide
for the payment of Additional Amounts, the Issuer will pay to the Holder of any
Security of such series Additional Amounts as may be specified as contemplated
by Section 301. Whenever in this Indenture there is mentioned, in any context
except in the case of Section 502(l), the payment of the principal of or any
premium or interest on, or in respect of, any Security of any series or payment
of any related Coupon or the net proceeds received on the statement or exchange
of any Security of any series, such mention shall be deemed to include mention
of the payment of Additional Amounts provided by the terms of such series
established pursuant to Section 301 to the extent that, in such context,
Additional Amounts are, were or would be payable in respect thereof pursuant to
such terms and express mention of the payment of Additional Amounts (if
applicable) in any provisions hereof shall not be construed as excluding
Additional Amounts in those provisions hereof where such express mention is not
made.



                                       57
<PAGE>   66

        Except as otherwise specified as contemplated by Section 301, if the
Securities of a series provide for the payment of Additional Amounts, at least
20 days prior to the first Interest Payment Date with respect to that series of
Securities (or if the Securities of that series will not bear interest prior to
Maturity, the first day on which a payment of principal and any premium is
made), and at least 10 days prior to each date of payment of principal and any
premium or interest if there has been any change with respect to the matters set
forth in the below-mentioned Officers' Certificate, the Issuer will furnish the
Trustee and the Issuer's principal Paying Agent or Paying Agents, if other than
the Trustee, with an Officers' Certificate instructing the Trustee and such
Paying Agent or Paying Agents whether such payment of principal of and premium
or interest on the Securities of that series shall be made to Holders of
Securities of that series or any related coupons who are not United States
persons without withholding for or on account of any tax, assessment or other
governmental charge described in the Securities of the series. If any such
withholding shall be required, then such Officers' Certificate shall specify by
country the amount, if any, required to be withheld on such payments to such
Holders of Securities of that series or related coupons and the Issuer will pay
to the Trustee or such Paying Agent the Additional Amounts required by the terms
of such Securities. In the event that the Trustee or any Paying Agent, as the
case may be, shall not so receive the above-mentioned certificate, then the
Trustee or such Paying Agent shall be entitled (i) to assume that no such
withholding or deduction is required with respect to any payment of principal
and premium or interest with respect to any Securities of a series or related
coupons until it shall have received a certificate advising otherwise and (ii)
to make all payments of principal and premium and interest with respect to the
Securities of a series or related coupons without withholding or deductions
until otherwise advised. The Issuer covenants to indemnify the Trustee and any
Paying Agent for, and to hold them harmless against, any loss, liability or
expense reasonably incurred without negligence or bad faith on their part
arising out of or in connection with actions taken or omitted by any of them or
in reliance on any Officers' Certificate furnished pursuant to this Section or
in reliance on the Issuer's not furnishing such an Officers' Certificate.

        SECTION 1010. Waiver of Certain Covenants. The Issuer may omit in any
particular instance to comply with any term, provision or condition set forth in
Sections 1006 through 1008, if before or after the time for such compliance the
Holders of at least a majority in principal amount of all Outstanding Securities
of each series, by Act of such Holders, either waive such compliance in such
instance or generally waive compliance with such covenant or condition, but no
such waiver shall extend to or affect such covenant or condition except to the
extent so expressly waived, and, until such waiver shall become effective, the
obligations of the Issuer and the duties of the Trustee in respect of such term,
provision or condition shall remain in full force and effect.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

        SECTION 1101. Applicability of Article. Securities of any series which
are redeemable before their Stated Maturity shall be redeemable in accordance
with their terms and (except as



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<PAGE>   67
otherwise specified as contemplated by Section 301 for Securities of any series)
in accordance with this Article.

        SECTION 1102. Election to Redeem; Notice to Trustee. The election of the
Issuer to redeem any Securities shall be evidenced by or pursuant to a Board
Resolution. In case of any redemption at the election of the Issuer of all or
less than all of the Securities of any series, the Issuer shall, at least 45
days prior to the giving of the notice of redemption contemplated in Section
1104 (unless a shorter notice shall be satisfactory to the Trustee in its sole
discretion), notify the Trustee of such Redemption Date and of the principal
amount of Securities of such series to be redeemed. In the case of any
redemption of Securities prior to the expiration of any restriction on such
redemption provided in the terms of such Securities or elsewhere in this
Indenture, the Issuer shall furnish the Trustee with an Officers' Certificate
evidencing compliance with such restriction.

        SECTION 1103. Selection by Trustee of Securities to Be Redeemed. If less
than all the Securities of any series are to be redeemed, the particular
Securities to be redeemed shall be selected not more than 60 days prior to the
Redemption Date by the Trustee, from the Outstanding Securities of such series
not previously called for redemption, by such method as the Trustee shall deem
fair and appropriate and which may provide for the selection for redemption of
portions (equal to the minimum authorized denomination for Securities of that
series or any integral multiple thereof) of the principal amount of Securities
of such series or a denomination larger than the minimum authorized denomination
for Securities of that series.

        The Trustee shall promptly notify the Issuer and the Security Registrar
(if other than itself) in writing of the Securities selected for redemption and,
in the case of any Securities selected for partial redemption, the principal
amount thereof to be redeemed.

        For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Security redeemed or to be redeemed only in part, to the
portion of the principal amount of such Security which has been or is to be
redeemed.

        SECTION 1104. Notice of Redemption. Notice of redemption shall be given
in the manner provided in Section 106 and may be further specified in an
indenture supplemental hereto, not less than 30 days nor more than 60 days prior
to the Redemption Date, unless a shorter period is specified by the terms of
such series established pursuant to Section 301, to each Holder of Securities to
be redeemed, but failure to give such notice in the manner herein provided to
the Holder of any Security designated for redemption as a whole or in part, or
any defect in the notice to any such Holder, shall not affect the validity of
the proceedings for the redemption of any other such Security or portion
thereof.

        Any notice that is mailed to the Holders of Registered Securities in the
manner herein provided shall be conclusively presumed to have been duly given,
whether or not a Holder receives the notice.

        All notices of redemption shall state:



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<PAGE>   68

                (1) the Redemption Date,

                (2) the Redemption Price, accrued interest to the Redemption
        Date payable as provided in Section 1106, if any, and Additional
        Amounts, if any,

                (3) if less than all Outstanding Securities of any series are to
        be redeemed, the identification (and, in the case of partial redemption,
        the principal amount) of the particular Security or Securities to be
        redeemed,

                (4) in case any Security is to be redeemed in part only, the
        notice which relates to such Security shall state that on and after the
        Redemption Date, upon surrender of such Security, the holder will
        receive, without charge, a new Security or Securities of authorized
        denominations for the principal amount thereof remaining unredeemed,

                (5) that on the Redemption Date, the Redemption Price and
        accrued interest to the Redemption Date payable as provided in Section
        1106, if any, will become due and payable upon each such Security, or
        the portion thereof, to be redeemed and, if applicable, that interest
        thereon shall cease to accrue on and after said date,

                (6) the Place or Places of Payment where such Securities,
        together in the case of Bearer Securities with all coupons appertaining
        thereto, if any, maturing after the Redemption Date, are to be
        surrendered for payment of the Redemption Price and accrued interest, if
        any, or for conversion,

                (7) that the redemption is for a sinking fund, if such is the
        case,

                (8) that unless otherwise specified in such notice, Bearer
        Securities of any series, if any, surrendered for redemption must be
        accompanied by all Coupons maturing subsequent to the Redemption Date or
        the amount of any such missing Coupon or Coupons will be deducted from
        the Redemption Price, unless security or indemnity satisfactory to the
        Issuer, the Trustee for such series and any Paying Agent is furnished,

                (9) if Bearer Securities of any series are to be redeemed and
        any Registered Securities of any such series are not to be redeemed, and
        if such Bearer Securities may be exchanged for Registered Securities not
        subject to redemption on this Redemption Date pursuant to Section 305 or
        otherwise, the last date, as determined by the Issuer, on which such
        exchanges may be made, and

                (10) the CUSIP number of such Security, if any.

                (11) if applicable, that a Holder of Securities who desires to
        convert Securities for redemption must satisfy the requirements for
        conversion contained in such Securities, the then existing conversion
        price or rate, and the date and time when the option to convert shall
        expire.

        Notice of redemption of Securities to be redeemed shall be given by the
Issuer or, at the Issuer's request, by the Trustee in the name and at the
expense of the Issuer. Neither the Issuer



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<PAGE>   69
nor the Trustee shall have any responsibility for any defect in the CUSIP number
that appears on any Security, check, advice of payment or redemption notice, and
any such document may contain a statement to the effect that CUSIP numbers have
been assigned by an independent service for convenience or reference and that
neither the Issuer nor the Trustee shall be liable for any inaccuracy in such
numbers.

        SECTION 1105. Deposit of Redemption Price. On or prior to 12:00 noon
Eastern Standard Time on the date prior to any Redemption Date, the Issuer shall
deposit with the Trustee or with a Paying Agent (or, if the Issuer is acting as
its own Paying Agent , which it may not do in the case of a sinking fund payment
under Article Twelve, segregate and hold in trust as provided in Section 1003)
an amount of money in the currency or currencies, currency unit or units or
composite currency or currencies in which the Securities of such series are
payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series) sufficient to pay on the Redemption Date the
Redemption Price of, and (except if the Redemption Date shall be an Interest
Payment Date) accrued interest on, all the Securities or portions thereof which
are to be redeemed on that date.

        SECTION 1106. Securities Payable on Redemption Date. Notice of
redemption having been given as aforesaid, the Securities so to be redeemed
shall, on the Redemption Date, become due and payable at the Redemption Price
therein specified in the currency or currencies, currency unit or units or
composite currency or currencies in which the Securities of such series are
payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series) (together with accrued interest, if any, to the
Redemption Date), and from and after such date (unless the Issuer shall default
in the payment of the Redemption Price and accrued interest) such Securities
shall, if the same were interest-bearing, cease to bear interest and the Coupons
for such interest appertaining to any Bearer Securities so to be redeemed,
except to the extent provided below, shall be void. Upon surrender of any such
Security for redemption in accordance with said notice, together with all
Coupons if any, appertaining thereto maturing after the Redemption Date, such
Security shall be paid by the Issuer at the Redemption Price, together with
accrued interest, if any, to the Redemption Date; provided, however, that
installments of interest on Bearer Securities whose Stated Maturity is on or
prior to the Redemption Date shall be payable only at an office or agency
located outside the United States (except as otherwise provided in Section 1002)
and, unless otherwise specified as contemplated by Section 301, only upon
presentation and surrender of Coupons for such interest; and proved further
that, except as otherwise provided with respect to Securities convertible into
Common Stock or Preferred Stock of the General Partner, installments of interest
on Registered Securities whose Stated Maturity is on or prior to the Redemption
Date shall be payable to the Holders of such Securities, or one or more
predecessor Securities registered as such at the close of business on the
relevant Record Dates according to their terms and the provisions of Section 307
if any Bearer Security surrendered for redemption shall not be accompanied by
all appurtenant Coupons maturing after the Redemption Date, such Security may be
paid after deducting from the Redemption Price an amount equal to the face
amount of all such missing Coupons, or the surrender of such missing Coupon or
Coupons may be waived by the Issuer and the Trustee if there be furnished to
them such security or indemnity as they may require to save each of them and any
Paying Agent harmless if thereafter the Holder of such Security shall surrender
to the Trustee or any Paying Agent any such missing Coupon in respect of which a
deduction shall have been made from the



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<PAGE>   70

Redemption Price, such Holder shall be entitled to receive the amount so
deducted; provided, however, that interest represented by Coupons shall be
payable only at an office or agency located outside the United States (except as
otherwise provided in Section 1002) and, unless otherwise specified as
contemplated by Section 301, only upon presentation and surrender of those
Coupons.

        If a Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal (and premium, if any) shall, until paid,
bear interest from the Redemption Date at the rate borne by the Security.

        SECTION 1107. Securities Redeemed in Part. Any Registered Security which
is to be redeemed only in part (pursuant to the provisions of this Article or of
Article Twelve) shall be surrendered at a Place of Payment therefor (with, if
the Issuer or the Trustee so requires, due endorsement by, or a written
instrument of transfer in form satisfactory to the Issuer and the Trustee duly
executed by the Holder thereof or his attorney duly authorized in writing) and
the Issuer shall execute and the Trustee shall authenticate and deliver to the
Holder of such Security, without charge and at the expense of the Issuer, a new
Security or Securities of the same series, of any authorized denomination
specified by such Holder in aggregate principal amount equal to and in exchange
for the unredeemed portion of the principal of the Security so surrendered.

                                 ARTICLE TWELVE

                                  SINKING FUNDS

        SECTION 1201. Applicability of Article. The provisions of this Article
shall be applicable to any sinking fund for the retirement of Securities of a
series except as otherwise specified as contemplated by Section 301 for
Securities of such series.

        The minimum amount of any sinking fund payment provided for by the terms
of Securities of any series is herein referred to as a "mandatory sinking fund
payment", and any payment in excess of such minimum amount provided for by the
terms of such Securities of any series is herein referred to as an "optional
sinking fund payment". If provided for by the terms of any Securities of any
series, the cash amount of any mandatory sinking fund payment may be subject to
reduction as provided in Section 1202. Each sinking fund payment shall be
applied to the redemption of Securities of any series as provided for by the
terms of Securities of such series.

        SECTION 1202. Satisfaction of Sinking Fund Payments with Securities. The
Issuer may, in satisfaction of all or any part of any mandatory sinking fund
payment with respect to the Securities of a series, (1) deliver Outstanding
Securities of such series (other than any previously called for redemption)
together in the case of any Bearer Securities of such series with any unmatured
Coupons appertaining thereto and (2) apply as a credit Securities of such series
which have been redeemed either at the election of the Issuer pursuant to the
terms of such Securities or through the application of permitted optional
sinking fund payments pursuant to the terms of such Securities, as provided for
by the terms of such Securities, or which have otherwise been acquired by the
Issuer; provided that such Securities so delivered or applied as a credit have
not




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<PAGE>   71

been previously so credited. Such Securities shall be received and credited for
such purpose by the Trustee at the applicable Redemption Price specified in such
Securities for redemption through operation of the sinking fund and the amount
of such mandatory sinking fund payment shall be reduced accordingly.

        SECTION 1203. Redemption of Securities for Sinking Fund. Not less than
60 days prior to each sinking fund payment date for Securities of any series,
the Issuer will deliver to the Trustee an Officers' Certificate specifying the
amount of the next ensuing mandatory sinking fund payment for that series
pursuant to the terms of that series, or portion thereof, if any, which is to be
satisfied by payment of cash in the currency or currencies, currency unit or
units or composite currency or currencies in which the Securities of such series
are payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series) and the portion thereof, if any, which is to be
satisfied by delivering and crediting Securities of that series pursuant to
Section 1202, and the optional amount, if any, to be added in cash to the next
ensuing mandatory sinking fund payment, and will also deliver to the Trustee any
Securities to be so delivered and credited. If such Officers' Certificate shall
specify an optional amount to be added in cash to the next ensuing mandatory
sinking fund payment, the Issuer shall thereupon be obligated to pay the amount
therein specified. Not less than 30 days before each such sinking fund payment
date the Trustee shall select the Securities to be redeemed upon such sinking
fund payment date in the manner specified in Section 1103 and cause notice of
the redemption thereto to be given in the name of and at the expense of the
Issuer in the manner provided in Section 1104. Such notice having been duly
given, the redemption of such Securities shall be made upon the terms and in the
manner stated in Sections 1106 and 1107.

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

        SECTION 1301. Applicability of Article. Repayment of Securities of any
series before their Stated Maturity at the option of Holders thereof shall be
made in accordance with the terms of such Securities, if any, and (except as
otherwise specified by the terms of such series established pursuant to Section
301) in accordance with this Article.

        SECTION 1302. Repayment of Securities. Securities of any series subject
to repayment in whole or in part at the option of the Holders thereof will,
unless otherwise provided in the terms of such Securities, be repaid at a price
equal to the principal amount thereof, together with interest, if any, thereon
accrued to the Repayment Date specified in or pursuant to the terms of such
Securities. The Issuer covenants that on but by no later than 12:00 noon Eastern
Standard Time or the day prior to the Repayment Date it will deposit with the
Trustee or with a Paying Agent (or, if the Issuer is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 1003) an amount of
money in the currency or currencies, currency unit or units or composite
currency or currencies in which the Securities of such series are payable
(except as otherwise specified pursuant to Section 301 for the Securities of
such series) sufficient to pay the principal (or, if so provided by the terms of
the Securities of any series, a percentage of the




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<PAGE>   72

principal) of, and (except if the Repayment Date shall be an Interest Payment
Date) accrued interest on, all the Securities or portions thereof, as the case
may be, to be repaid on such date.

        SECTION 1303. Exercise of Option. Securities of any series subject to
repayment at the option of the Holders thereof will contain an "Option to Elect
Repayment" form on the reverse of such Securities. In order for any Security to
be repaid at the option of the Holder, the Trustee must receive at the Place of
Payment therefor specified in the terms of such Security (or at such other place
or places of which the Issuer shall from time to time notify the Holders of such
Securities) not earlier than 60 days nor later than 30 days prior to the
Repayment Date (1) the Security so providing for any such repayment together
with the "Option to Elect Repayment" form on the reverse thereof duly completed
by the Holder or by the Holder's attorney duly authorized in writing or (2) a
telegram, facsimile transmission or a letter from a member of a national
securities exchange, or the National Association of Securities Dealers, Inc.
("NASD"), or a commercial bank or trust company in the United States setting
forth the name of the Holder of the Security, the principal amount of the
Security, the principal amount of the security to be repaid, the CUSIP number,
if any, or a description of the tenor and terms of the Security, a statement
that the option to elect repayment is being exercised thereby and a guarantee
that the Security to be repaid, together with the duly completed form entitled
"Option to Elect Repayment" on the reverse of the Security, will be received by
the Trustee not later than the fifth Business Day after the date of such
telegram, telex, facsimile transmission or letter; provided, however, that such
telegram, telex, facsimile transmission or letter shall only be effective if
such Security and form duly completed are received by the Trustee by such fifth
Business Day. If less than the entire principal amount of such Security is to be
repaid in accordance with the terms of such Security, the principal amount of
such Security to be repaid, in increments of the minimum denomination for
Securities of such series, shall be stated in a writing accompanying such
Security. Except as otherwise may be provided by the terms of any Security
providing for repayment at the option of the Holder thereof, exercise of the
repayment option by the Holder shall be irrevocable unless waived by the Issuer.

        SECTION 1304. When Securities Presented for Recipient Become Due and
Payable. If Securities of any series providing for repayment at the option of
the Holders thereof shall have been surrendered as provided in this Article and
as provided by or pursuant to the terms of such Securities, such Securities or
the portions thereof, as the case may be, to be repaid shall become due and
payable and shall be paid by the Issuer on the Repayment Date therein specified,
and on and after such Repayment Date (unless the Issuer shall default in the
payment of such Securities on such Repayment Date) such Securities shall, if the
same were interest-bearing, cease to bear interest and the Coupons for such
interest appertaining to any Bearer Securities so to be repaid, except to the
extent provided below, shall be void. Upon surrender of any such Security for
repayment in accordance with such provisions, together with all Coupons, if any,
appertaining thereto maturing after the Repayment Date, the principal amount of
such Security so to be repaid shall be paid by the Issuer, together with accrued
interest, if any, to the Repayment Date; provided, however, that Coupons whose
Stated Maturity is on or prior to the Repayment Date shall be payable only at an
office or agency located outside the United States (except as otherwise provided
in Section 1002) and, unless otherwise specified pursuant to Section 301, only
upon presentation and surrender of such Coupons; and provided further that, in
the case of Registered Securities, installments of interest, if any, whose
Stated Maturity is on or prior to the Repayment



                                       64
<PAGE>   73
Date, shall be payable (but without interest thereon, unless the Issuer shall
default in the payment thereof) to the Holders of such Securities, or one or
more predecessor Securities, registered as such as the close of business on the
relevant Record Dates according to their terms and the provisions of Section
307.

        If any Bearer Security surrendered for repayment shall not be
accompanied by all appurtenant Coupons maturing after the Repayment Date, such
Security may be paid after deducting from the amount payable therefor as
provided in Section 1302 an amount equal to the face amount of all such missing
Coupons, or the surrender of such missing Coupon or Coupons may be waived by the
Issuer and the Trustee if there be furnished to them such security or indemnity
as they may require to save each of them and any Paying Agent harmless. If
thereafter the Holder of such Security shall surrender to the Trustee or any
Paying Agent any such missing coupon in respect of which a deduction shall have
been made as provided in the preceding sentence, such Holder shall be entitled
to receive the amount so deducted; provided, however, that interest represented
by Coupons shall be payable only at an office or agency located outside the
United States (except as otherwise provided in Section 1002) and, unless
otherwise specified as contemplated by Section 301, only upon presentation and
surrender of those Coupons.

        If the principal amount of any Security surrendered for repayment shall
not be so repaid upon surrender thereof, such principal amount (together with
interest, if any, thereon accrued to such Repayment Date) shall, until paid,
bear interest from the Repayment Date at the rate of interest or Yield to
Maturity (in the case of Original Issue Discount Securities) set forth in such
Security.

        SECTION 1305. Securities Repaid in Part. Upon surrender of any
Registered Security which is to be repaid in part only, the Issuer shall execute
and the Trustee shall authenticate and deliver to the Holder of such Security,
without charge and at the expense of the Issuer, a new Registered Security or
Securities of the same series, of any authorized denomination specified by the
Holder, in an aggregate principal amount equal to and in exchange for the
portion of the principal of such Security so surrendered which is not to be
repaid.

                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

        SECTION 1401. Applicability of Article; Issuer's Option to Effect
Defeasance or Covenant Defeasance. If, pursuant to Section 301, provision is
made for either or both of (a) defeasance of the Securities of a series under
Section 1402 or (b) covenant defeasance of the Securities of a series under
Section 1403, then the provisions of such Section or Sections, as the case may
be, together with the other provisions of this Article (with such modifications
thereto as may be specified pursuant to Section 301 with respect to any
Securities), shall be applicable to such Securities and any coupons appertaining
thereto, and the Issuer may at its option by Board Resolution delivered to the
Trustee, at any time, with respect to such Securities and any Coupons
appertaining thereto, elect to have Section 1402 (if applicable) or Section 1403
(if applicable) be applied to such Outstanding Securities and any Coupons
appertaining thereto upon compliance with the conditions set forth below in this
Article.



                                       65
<PAGE>   74

        SECTION 1402. Defeasance and Discharge. Upon the Issuer's exercise of
the above option applicable to this Section with respect to any Securities of a
series, the Issuer shall be deemed to have been discharged from its obligations
with respect to such Outstanding Securities and any Coupons appertaining thereto
on the date the conditions set forth in Section 1404 are satisfied (hereinafter,
"defeasance"). For this purpose, such defeasance means that the Issuer shall be
deemed to have paid and discharged the entire indebtedness represented by such
Outstanding Securities and any Coupons appertaining thereto, which shall
thereafter be deemed to be "Outstanding" only for the purposes of Section 1405
and the other Sections of this Indenture referred to in clauses (A) and (B)
below, and to have satisfied all of its other obligations under such Securities
and coupons appertaining thereto and this Indenture insofar as such Securities
and any coupons appertaining thereto are concerned (and the Trustee, at the
expense of the Issuer, shall execute proper instruments acknowledging the same),
except for the following which shall survive until otherwise terminated or
discharged hereunder: (A) the rights of Holders of such Outstanding Securities
and any coupons appertaining thereto to receive, solely from the trust fund
described in Section 1404 and as more fully set forth in such Section, payments
in respect of the principal of (and premium, if any) and interest, if any, on
such Securities and any coupons appertaining thereto when such payments are due,
(B) the Issuer's obligations with respect to such Securities under Sections 305,
306, 606, 1002 and 1003 and with respect to the payment of Additional Amounts,
if any, on such Securities as contemplated by Section 1009, (C) the rights,
powers, trusts, duties and immunities of the Trustee hereunder and (D) this
Article Fourteen. Subject to compliance with this Article Fourteen, the Issuer
may exercise its option under this Section notwithstanding the prior exercise of
its option under Section 1403 with respect to such Securities and any coupons
appertaining thereto.

        SECTION 1403. Covenant Defeasance. Upon the Issuer's exercise of the
above option applicable to this Section with respect to any Securities of a
series, the Issuer shall be released from its obligations under Sections 1006
through 1008 and, if specified pursuant to Section 301, its obligations under
any other covenant, with respect to such Outstanding Securities and any coupons
appertaining thereto on and after the date the conditions set forth in Section
1404 are satisfied (hereinafter, "covenant defeasance"), and such Securities and
any coupons appertaining thereto shall thereafter be deemed to be not
"Outstanding" for the purposes of any direction, waiver, consent or declaration
or Act of Holders (and the consequences of any thereof) in connection with
Sections 1006 through 1008 or such other covenant, but shall continue to be
deemed "Outstanding" for all other purposes hereunder. For this purpose, such
covenant defeasance means that, with respect to such Outstanding Securities and
any coupons appertaining thereto, the Issuer may omit to comply with and shall
have no liability in respect of any term, condition or limitation set forth in
any such Section or any such other covenant, whether directly or indirectly, by
reason of any reference elsewhere herein to any such Section or such other
covenant or by reason of reference in any such Section or such other covenant to
any other provision herein or in any other document and such omission to comply
shall not constitute a default or an Event of Default under Section 501(4) or
501(8) or otherwise, as the case may be, but except as specified above, the
remainder of this Indenture and such Securities and any coupons appertaining
thereto shall be unaffected thereby.



                                       66
<PAGE>   75

        SECTION 1404. Conditions to Defeasance or Covenant Defeasance. The
following shall be the conditions to application of Section 1402 or Section 1403
to any Outstanding Securities of a series and any coupons appertaining thereto:

        (a) The Issuer shall irrevocably have deposited or caused to be
deposited with the Trustee (or another trustee satisfying the requirements of
Section 607 who shall agree to comply with the provisions of this Article
Fourteen applicable to it) as trust funds in trust for the purpose of making the
following payments, specifically pledged as security for, and dedicated solely
to, the benefit of the Holders of such Securities and any coupons appertaining
thereto, (1) an amount in such currency, currencies or currency unit in which
such Securities and any coupons appertaining hereto are then specified as
payable at Stated Maturity) which through the scheduled payment of principal and
interest in respect thereof in accordance with their terms will provide, not
later than one day before the due date of any payment of principal of (and
premium, if any) and interest, if any, on such Securities and any coupons
appertaining thereto, or (2) a combination of currency, currencies or currency
units in an amount, sufficient, in the opinion of a nationally recognized firm
of independent public accountants expressed in a written certification thereof
delivered to the Trustee, to pay and discharge, and which shall be applied by
the Trustee (or other qualifying trustee) to pay and discharge, (i) the
principal (and premium, if any) and interest, if any, on such Outstanding
Securities and any coupons appertaining thereto on the Stated Maturity of such
principal or installment of principal or interest and (ii) any mandatory sinking
fund Payments or analogous payments applicable to such Outstanding Securities
any coupons appertaining thereto on the day on which such payments are due and
payable in accordance with the terms of this Indenture and of such Securities
and any coupons appertaining thereto.

        (b) Such defeasance or covenant defeasance shall not result in a breach
or violation of, or constitute a default under, this Indenture or any other
material agreement or instrument to which the Issuer is a party or by which it
is bound as expressed in the Officers' Certificate contemplated in subsection
(f) below.

        (c) No Event of Default or event which with notice or lapse of time or
both would become an Event of Default with respect to such Securities and any
coupons appertaining thereto shall have occurred and be continuing on the date
of such deposit or, insofar as Sections 501(6) and 501(7) are concerned as
expressed in the Officers' Certificate contemplated in subsection (f) below, at
any time during the period ending on the 91st day after the date of such deposit
(it being understood that this condition shall not be deemed satisfied until the
expiration of such period).

        (d) In the case of an election under Section 1402, the Issuer shall have
delivered to the Trustee an Opinion of Counsel stating that (i) the Issuer has
received from, or there has been published by, the Internal Revenue Service a
ruling, or (ii) since the date of execution of this Indenture, there has been a
change in the applicable Federal income tax law, in either case to the effect
that, and based thereon such opinion shall confirm that, the Holders of such
Outstanding Securities and any coupons appertaining thereto will not recognize
income, gain or loss or Federal income tax purposes as a result of such
defeasance and will be subject to Federal income



                                       67
<PAGE>   76
tax on the same amounts, in the same manner and at the same times as would have
been the case if such defeasance had not occurred.

        (e) In the case of an election under Section 1403, the Issuer shall have
delivered to the Trustee an Opinion of Counsel to the effect that the Holders of
such Outstanding Securities and any coupons appertaining thereto will not
recognize income, gain or loss for Federal income tax purposes as a result of
such covenant defeasance and will be subject to Federal income tax on the same
amounts, in the same manner and at the same times as would have been the case if
such covenant defeasance had not occurred.

        (f) The Issuer shall have delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each containing the representations in
subsections (b) and (c) of this Section 1404 and each stating that all
conditions precedent to the defeasance under Section 1402 or the covenant
defeasance under Section 1403 (as the case may be) have been complied with and
an Opinion of Counsel to the effect that either (i) as a result of a deposit
pursuant to subsection (a) above and the related exercise of the Issuer's option
under Section 1402 or Section 1403 (as the case may be), registration is not
required under the Investment Company Act of 1940, as amended, by the Issuer,
with respect to the trust funds representing such deposit or by the Trustee for
such trust funds or (ii) all necessary registrations under said Act have been
effected.

        (g) Notwithstanding any other provisions of this Section, such
defeasance or covenant defeasance shall be effected in compliance with any
additional or substitute terms, conditions or limitations which may be imposed
on the Issuer in connection therewith pursuant to Section 301.

        SECTION 1405. Deposited Money and Government Obligations to Be Held in
Trust; Other Miscellaneous Provisions. Subject to the provisions of the last
paragraph of Section 1003, all money and Government Obligations (or other
property as may be provided pursuant to Section 301) deposited with the Trustee
(or other qualifying trustee, collectively for purposes of this Section 1405,
the "Trustee") pursuant to Section 1404 in respect of any Outstanding Securities
of any series and any Coupons appertaining thereto shall be held in trust and
applied by the Trustee, in accordance with the provisions of such Securities and
any Coupons appertaining thereto and this Indenture, to the payment, either
directly or through any Paying Agent (including the Issuer acting as its own
Paying Agent) as the Trustee may determine, to the Holders of such Securities
and any Coupons appertaining thereto of all sums due and to become due thereon
in respect of principal (and premium if any) and interest on Additional Amounts,
if any, but such money need not be segregated from other funds except to the
extent required by law.

        Unless otherwise specified with respect to any Security pursuant to
Section 301, if, after a deposit referred to in Section 1404(a) has been made,
(a) the Holder of a Security in respect of which such deposit was made is
entitled to, and does, elect pursuant to Section 301 or the terms of such
Security to receive payment in a currency or currency unit other than that in
which the deposit pursuant to Section 1404(a) has been made in respect of such
Security, or (b) a Conversion Event occurs in respect of the currency or
currency unit in which the deposit pursuant to Section 1404(a) has been made,
the indebtedness represented by such Security and any



                                       68
<PAGE>   77

coupons appertaining thereto shall be deemed to have been, and will be fully
discharged and satisfied through the payment of the principal of (and premium,
if any), and interest, if any, on such Security as the same becomes due out of
the proceeds yielded by converting (from time to time as specified below in the
case of any such election) the amount or other property deposited in respect of
such Security into the currency or currency unit in which such Security becomes
payable as a result of such election based on the applicable market exchange
rate for such currency or currency unit published in the Wall Street Journal on
the second Business Day prior to each payment date, or, with respect to a
Conversion Event, in effect for such currency or currency unit (as nearly as
feasible) at the time of the Conversion Event. Any fees or other charges
incurred by the Trustee or otherwise imposed in connection with such conversion
shall be borne by the Holders thereof and may be deducted by the Trustee from
amounts otherwise due such Holders.

        The Issuer shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the Government Obligations deposited
pursuant to Section 1404 or the principal and interest received in respect
thereof other than any such tax, fee or other charge which bylaw is for the
account of the Holders of such Outstanding Securities and any Coupons
appertaining thereto.

        Anything in this Article to the contrary notwithstanding, the Trustee
shall deliver or pay to the Issuer from time to time upon Issuer Request any
money or Government Obligations (or other property and any proceeds therefrom)
held by it as provided in Section 1404 which, in the opinion of a nationally
recognized firm of independent public accountants expressed in a written
certification thereof delivered to the Trustee, are in excess of the amount
thereof which would then be required to be deposited to effect a defeasance or
covenant defeasance, as applicable, in accordance with this Article.

                                ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

        SECTION 1501. Purposes for Which Meetings May Be Called. A meeting of
Holders of Securities of any series may be called at any time and from time to
time pursuant to this Article to make, give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided by
this Indenture to be made, given or taken by Holders of Securities of such
series.

        SECTION 1502. Call, Notice and Place of Meetings.

        (a) The Trustee may at any time call a meeting of Holders of Securities
of any series for any purpose specified in Section 1501, to be held at such time
and at such place in San Francisco, California, or in London as the Trustee
shall determine. Notice of every meeting of Holders of Securities of any series,
setting forth the time and the place of such meeting and in general terms the
action proposed to be taken at such meeting, shall be given, in the manner
provided in Section 106, not less than 21 nor more than 180 days prior to the
date fixed for the meeting.



                                       69
<PAGE>   78

        (b) In case at any time the Issuer, pursuant to a Board Resolution, or
the Holders of at least twenty-five percent (25%) in principal amount of the
Outstanding Securities of any series shall have requested the Trustee to call a
meeting of the Holders of Securities of such series for any purpose specified in
Section 1501, by written request setting forth in reasonable detail the action
proposed to be taken at the meeting, and the Trustee shall not have made the
first mailing of the notice of such meeting within 21 days after receipt of such
request or shall not thereafter proceed to cause the meeting to be held as
provided herein, then the Issuer or the Holders of Securities of such series in
the amount above specified, as the case may be, may determine the time and the
place in San Francisco, California, New York, New York, or in London for such
meeting and may call such meeting for such purposes by waiving notice thereof as
provided in subsection (a) of this Section. SECTION 1503. Persons Entitled to
Vote at Meetings. To be entitled to vote at any meeting of Holders of Securities
of any series, a Person shall be (1) a Holder of one or more Outstanding
Securities of such series, or (2) a Person appointed by an instrument in writing
as proxy for a Holder or Holders of one or more Outstanding Securities of such
series by such Holder or Holders. The only Persons who shall be entitled to be
present or to speak at any meeting of Holders of Securities of any series shall
be the Persons entitled to vote at such meeting and their counsel, any
representatives of the Trustee and its counsel and any representatives of the
Issuer and its counsel.

        SECTION 1504. Quorum; Action. The Persons entitled to vote a majority in
principal amount of the Outstanding Securities of a series shall constitute a
quorum for a meeting of Holders of Securities of such series; provided, however,
that if any action is to be taken at such meeting with respect to a consent or
waiver which this Indenture expressly provides may be given by the Holders of
not less than a specified percentage in principal amount of the Outstanding
Securities of a series, the Persons entitled to vote such specified percentage
in principal amount of the Outstanding Securities of such series shall
constitute a quorum. In the absence of a quorum within 30 minutes after the time
appointed for any such meeting, the meeting shall, if convened at the request of
Holders of Securities of such series, be dissolved. In any other case the
meeting may be adjourned for a period of not less than 10 days determined by the
chairman of the meeting prior to the adjournment of such meeting. In the absence
of a quorum at any such adjourned meeting, such adjourned meeting may be further
adjourned for a period of not less than 10 days as determined by the chairman of
the meeting prior to the adjournment of such adjourned meeting. Notice of the
reconvening of any adjourned meeting shall be given as provided in Section
1502(a), except that such notice need be given only once not less than five days
prior to the date on which the meeting is scheduled to be reconvened. Notice of
the reconvening of any adjourned meeting shall state expressly the percentage,
as provided above, of the principal amount of the Outstanding Securities of such
series which shall constitute a quorum.

        Except as limited by the proviso to Section 902, any resolution
presented to a meeting or adjourned meeting duly reconvened at which a quorum is
present as aforesaid may be adopted by the affirmative vote of the Holders of a
majority in principal amount of the outstanding Securities of that series;
provided, however, that, except as limited by the provisions of Section 902, any
resolution with respect to any request, demand, authorization, direction,
notice, consent, waiver



                                       70
<PAGE>   79

or other action which this Indenture expressly provides may be made, given or
taken by the Holders of a specified percentage, which is less than a majority,
in principal amount of the Outstanding Securities of such a series may be
adopted at a meeting or an adjourned meeting duly reconvened and at which a
quorum is present as aforesaid by the affirmative vote of the Holders of such
specified percentage in principal amount of the Outstanding Securities of that
series.

        Any resolution passed or decision taken at any meeting of Holders of
Securities of any series duly held in accordance with this Section shall be
binding on all the Holders of Securities of such series and the related Coupons,
whether or not present or represented at the meeting.

        Notwithstanding the foregoing provisions of this Section 1504, if any
action is to be taken at a meeting of Holders of Securities of any series with
respect to any request, demand, authorization, direction, notice, consent,
waiver or other action that this Indenture expressly provides may be made, given
or taken by the Holders of a specified percentage in principal amount of all
Outstanding Securities affected thereby, or of the Holders of such series and
one or more additional series:

                (i) there shall be no minimum quorum requirement for such
        meeting; and

                (ii) the principal amount of the Outstanding Securities of such
        series that vote in favor of such request, demand, authorization,
        direction, notice, consent, waiver or other action shall be taken into
        account in determining whether such request, demand, authorization,
        direction, notice, consent, waiver or other action has been made, given
        or taken under this Indenture.

        SECTION 1505. Determination of Voting Rights; Conduct and Adjournment of
Meetings.

        (a) Notwithstanding any provisions of this Indenture, the Trustee may
make such reasonable regulations as it may deem advisable for any meeting of
Holders of Securities of a series in regard to proof of the holding of
Securities of such series and of the appointment of proxies and in regard to the
appointment and duties of inspectors of votes, the submission and examination of
proxies, certificates and other evidence of the right to vote, and such other
matters concerning the conduct of the meeting as it shall deem appropriate.
Except as otherwise permitted or required by any such regulations, the holding
of Securities shall be proved in the manner specified in Section 104 and the
appointment of any proxy shall be proved in the manner specified in Section 104
or having the nature of the Person executing the proxy witnessed or guaranteed
by any trust company, bank or banker authorized by Section 104 to certify to the
holding of Bearer Securities. Such regulations may provide that written
instruments appointing proxies, regular on their face, may be presumed valid or
genuine without the proof specified in Section 104 or other proof.

        (b) The Trustee shall, by an instrument in writing, appoint a temporary
chairman of the meeting, unless the meeting shall have been called by the Issuer
or by Holders of Securities as provided in Section 1502(b), in which case the
Issuer or the Holders of Securities of the series



                                       71
<PAGE>   80

calling the meeting, as the case may be, shall in like manner appoint a
temporary chairman. A permanent chairman and a permanent secretary of the
meeting shall be elected by vote of the Persons entitled to vote a majority in
principal amount of the Outstanding Securities of such series represented at the
meeting.

        (c) At any meeting each Holder of a Security of such series or proxy
shall be entitled to one vote for each $1,000 principal amount of the
Outstanding Securities of such series held or represented by him; provided,
however, that no vote shall be cast or counted at any meeting in respect of any
Security challenged as not Outstanding and ruled by the chairman of the meeting
to be not Outstanding. The chairman of the meeting shall have no right to vote,
except as a Holder of a Security of such series or proxy.

        (d) Any meeting of Holders of Securities of any series duly called
pursuant to Section 1502 at which a quorum is present may be adjourned from time
to time by Persons entitled to vote a majority in principal amount of the
Outstanding Securities of such series represented at the meeting, and the
meeting may be so adjourned without further notice.

        SECTION 1506. Counting Votes and Recording Action of Meeting. The vote
upon any resolution submitted to any meeting of Holders of Securities of any
series shall be by written ballots on which shall be subscribed the signatures
of the Holders of Securities of such series or of their representatives by proxy
and the principal amounts and serial numbers of the Outstanding Securities of
such series held or represented by them. The permanent chairman of the meeting
shall appoint two inspectors of votes who shall count all votes cast at the
meeting for or against any resolution and who shall make and file with the
secretary of the meeting their verified written reports in Duplicate of all
votes cast at the meeting. A record, at least in duplicate, of the proceedings
of each meeting of Holders of Securities of any Series shall be prepared by the
secretary of the meeting and there shall be attached to said record the original
reports of the inspectors of votes on any vote by ballot taken thereat and
affidavits by one or more persons having knowledge of the fact, setting forth a
copy of the notice of the meeting and showing that said notice was given as
provided in Section 1502 and, if applicable, Section 1504. Each copy shall be
signed and verified by the affidavits of the permanent chairman and secretary of
the meeting and one such copy shall be delivered to the Issuer and another to
the Trustee to be reserved by the Trustee, the latter to have attached thereto
the Ballots voted at the meeting. Any record so signed and verified shall be
conclusive evidence of the matters therein stated.

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



                                       72
<PAGE>   81

        IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed, and the corporate seal of the Issuer to be hereunto affixed and
attested, as of the day and year first above written.



                                       SDL, INC.


                                       By:_____________________________________
                                          Name:
                                          Title:
(Seal)
Attest:


___________________________
Title:

                                       ________________________________________
                                       as Trustee


                                       By:_____________________________________
                                          Name:
                                          Title:
Attest:


_____________________________
Title:



                                       73
<PAGE>   82
STATE OF       )
COUNTY OF      ) ss.:

        On the ______ day of _____________________, 19__, before me personally
came _____________________ to me known, who, being by me duly sworn, did depose
and say that he is the __________________ of SDL, Inc., one of the entities
described in and which executed the above instrument; that he knows the
corporate seal of said corporation; that the seal affixed to the said instrument
is such corporation seal; that it was so affixed by authority of the
corporation, and that he signed his name thereto by like authority.



                                            ____________________________________




                                       74
<PAGE>   83

                                                                     EXHIBIT 4.4

                                  EXHIBIT A-1

              FORM OF CERTIFICATE TO BE GIVEN BY PERSON ENTITLED TO
              RECEIVE BEARER SECURITY OR TO OBTAIN INTEREST PAYABLE
                           PRIOR TO THE EXCHANGE DATE

    (Insert title or sufficient description of Securities to be delivered).

        This is to certify that, as of the date, hereof, and except as set forth
below, the above-captioned Securities held by you for our account (i) are owned
by person(s) that are not citizens or residents of the United States, domestic
partnerships, domestic corporations or any estate or trust the income of which
is subject to United States federal income taxation regardless of its source
("United States person(s)"), (ii) are owned by United States person(s) that are
(a) foreign branches of United States financial institutions (financial
institutions, as defined in United States Treasury Regulations Section
2.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing
for their own account or for resale, or (b) United States person(s) who acquired
the Securities through foreign branches of United States financial institutions
and who hold the Securities through such United States financial institutions on
the date hereof (and in either case (a) or (b), each such United States
financial institutions hereby agrees, on its own behalf or through its agent,
that you may advise SDL, Inc., or its agent that such financial institutions
will comply with the requirements of Section 165(j)(3)(A), (B) or (C) of the
United States Internal Revenue Code of 1986, as amended, and the regulations
thereunder), or (iii) are owned by United States or foreign financial
institution for purposes of resale during the restricted period (as defined in
United States Treasury Regulations Section 1.163-5(c)(1)(i)(D)(7)), and, in
addition, if the owner is a United States or foreign financial institution
described in clause (iii) above (whether or not also described in clause (i) or
(ii)), this is to further certify that such financial institution has not
acquired the Securities for purposes of resale directly or indirectly to a
United States person or to a person within the United States or its possessions.

        As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

        We undertake to advise you promptly by facsimile on or prior to the date
on which you intend to submit your certification relating to the above-captioned
Securities held by you for our account in accordance with your operating
procedures if any applicable statement herein is not correct on such date, and
in the absence of any such notification it may be assumed that this
certification applies as of such date.

        This certificate excepts and does not relate to (U.S.$)_____ of such
interest in the above-captioned Securities in respect of which we are not able
to certify and as to which we understand an exchange for an interest in a
permanent global Security or an exchange for and delivery of definitive
Securities (or, if relevant, collection of any interest) cannot be made until we
do so certify.

        We understand that this certificate may be required in connection with
certain tax legislation in the United States. if administrative or legal
proceedings are commenced or



                                       1
<PAGE>   84

threatened in connection with which this certificate is or would be relevant,
we irrevocably authorize you to produce this certificate or a copy thereof to
any interested party in such proceedings.

        Dated  19___

        (To be dated no earlier than the 15th day prior to (i) the Exchange Date
or (ii) the relevant Interest Payment Date occurring prior to the Exchange Date,
as applicable)

        (Name of Person Making Certification)



       (Authorized Signatory)
       ________________________________________
       Name:
       Title:



                                       2
<PAGE>   85

                                                                     EXHIBIT 4.4

                                   EXHIBIT A-2

                FORM OF CERTIFICATE TO BE GIVEN BY EUROCLEAR AND
             CEDEL S.A. IN CONNECTION WITH THE EXCHANGE OF A PORTION
              OF A TEMPORARY GLOBAL SECURITY OR TO OBTAIN INTEREST
                       PAYABLE PRIOR TO THE EXCHANGE DATE

                                   CERTIFICATE
     (Insert title or sufficient description of Securities to be delivered)

        This is to certify that, based solely on written certifications that we
have received in writing, by tested telex or by electronic transmission from
each of the persons appearing in our records as persons entitled to a portion of
the principal amount set forth below (our "Member Organizations") substantially
in the form attached hereto, as of the date hereof, (U.S.$)_____ principal
amount of the above-captioned Securities (i) is owned by person(s) that are not
citizens or residents of the United States, domestic partnerships, domestic
corporations or any estate or trust the income of which is subject to United
States Federal income taxation regardless of its source ("United States
person(s)"), (ii) is owned by United States person(s) that are (a) foreign
branches of United States financial institutions (financial institutions, as
defined in U.S. Treasury Regulations Section 1.165-12(c)(1)(v) are herein
referred to as "financial institutions") purchasing for their own account or for
resale, or (b) United States person(s) who acquired the Securities through
foreign branches of United States financial institutions and who hold the
Securities through such United States financial institutions on the date thereof
(and in either case (a) or (b), each such financial institution will comply with
the requirements of Section 165(j)(3)(A), (B) or (C) of the Internal Revenue
Code of 1986, as amended, and the regulations thereunder), or (iii) is owned by
United States or foreign financial institution(s) for purposes of resale during
the restricted period (as defined in United States Treasury Regulations Section
1.163-5(c)(2)(i)(D)(7)), and, to the further effect, that financial institutions
described in clause (iii) above (whether or not also described in clause (i) or
(ii)) have certified that they have not acquired the Securities for purposes of
resale directly or indirectly to a United States person or to a person within
the United States or its possessions.

        As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

        We further certify that (i) we are not making available herewith for
exchange (or, if relevant, collection of any interest) any option of the
temporary global Security representing the above-captioned Securities excepted
in the above-referenced certificates of Member Organizations and (ii) as of the
date hereof we have not received any notification from any of our Member
Organizations to the effect that the statements made by such Member
Organizations with respect to any portion of the part submitted herewith for
exchange (or, if relevant, collection of any interest) are no longer true and
cannot be relied upon as of the date hereof.

        We understand that this certification is required in connection with
certain tax legislation in the United States. If administrative or legal
proceedings are commenced or threatened in



                                       1
<PAGE>   86

connection with which this certificate is or would be relevant, we irrevocably
authorize you to produce this certificate or a copy thereof to any interested
party in such proceedings.

        Date:  ___19

        (To be dated no earlier than the Exchange Date or the relevant Interest
Payment Date occurring prior to the Exchange Date, as applicable)



_____________________________________________________________
(Morgan Guaranty Trust Company of New York, Brussels Office,
as Operator of the Euroclear System)
(Cedel S.A.)



                                       2

<PAGE>   1
                                                                     EXHIBIT 5.1


August 11, 1999



SDL, Inc.
80 Rose Orchard Way
San Jose, California  95134

Dear Sirs:

        We are acting as counsel to SDL, Inc., a Delaware corporation (the
"Company"), in connection with the shelf registration by the Company of
$300,000,000 in maximum aggregate offering price of (i) shares of the Company's
common stock, par value $.001 per share (the "Common Stock"), (ii) shares of the
Company's preferred stock, par value $.001 per share ("Preferred Stock"), (iii)
shares of the Company's Preferred Stock represented by depositary shares
("Depositary Shares"), (iv) warrants to purchase shares of the Company's Common
Stock and Preferred Stock (the "Warrants") and (v) debt securities of the
Company ("Debt Securities"). The Common Stock, Preferred Stock, Depositary
Shares, Warrants and Debt Securities are the subject of a Registration Statement
(the "Registration Statement") filed by the Company on Form S-3 under the
Securities Act of 1933, as amended (the "Act").

        In our capacity as your counsel in connection with such registration, we
are familiar with the proceedings taken and proposed to be taken by the Company
in connection with the authorization and issuance of the Common Stock, Preferred
Stock, Depositary Shares, Warrants and the Debt Securities, and for the purposes
of this opinion, have assumed such proceedings will be timely completed in the
manner presently proposed. In addition, we have made such legal and factual
examinations and inquiries, including an examination of originals or copies
certified or otherwise identified to our satisfaction of such documents,
corporate records and instruments, as we have deemed necessary or appropriate
for purposes of this opinion.

        Based upon and subject to the foregoing, it is our opinion that:

        (1) The Company has authority pursuant to its Restated Certificate of
Incorporation, as amended (the "Certificate of Incorporation") to issue the
shares of Common Stock to be registered under the Registration Statement and (a)
upon the adoption by the Board of Directors of a resolution in form and content
required by

<PAGE>   2
SDL, Inc.
August 11, 1999
Page 2



applicable law, (b) upon compliance with the applicable provisions of the Act
and such state "blue sky" or securities laws as may be applicable and (c) upon
issuance and delivery of and payment for such shares in the manner contemplated
by the Registration Statement and/or the applicable Prospectus Supplement, such
shares of Common Stock will be legally issued, fully paid, and nonassessable.

        (2) The Company has authority pursuant to its Certificate of
Incorporation to issue the shares of Preferred Stock to be registered under the
Registration Statement and (a) upon the adoption by the Board of Directors of a
resolution in form and content required by applicable law, (b) upon compliance
with the applicable provisions of the Act and such state "blue sky" or
securities laws as may be applicable, (c) upon the adoption by the Company's
Board of Directors and the due execution and filing under Delaware law by the
Company of an amendment to the Certificate of Incorporation or a certificate of
designation establishing the preferences, limitations and relative voting and
other rights of each series of Preferred Stock prior to issuance thereof and (d)
upon issuance and delivery of and payment for such shares in the manner
contemplated by the Registration Statement and/or the applicable Prospectus
Supplement, such shares of Preferred Stock will be legally issued, fully paid,
and nonassessable.

        (3) The Company has authority pursuant to its Certificate of
Incorporation to issue the Warrants to be registered under the Registration
Statement. The shares of Common Stock and shares of Preferred Stock issuable
upon exercise of the Warrants will have been duly and validly authorized (a)
upon the adoption by the Board of Directors of a resolution in form and content
as required by applicable law, (b) upon compliance with the applicable
provisions of the Act and such state "blue sky" or securities laws as may be
applicable and (c) with respect to such shares of Preferred Stock, upon the
adoption by the Company's Board of Directors and the due execution and filing
under the Delaware law by the Company of an amendment to the Certificate of
Incorporation or a certificate of designation establishing the preferences,
limitations and relative voting and other rights of each series of Preferred
Stock prior to issuance thereof. The shares of Common Stock and shares of
Preferred Stock issuable upon exercise of the Warrants, when duly and validly
authorized and when issued in the manner contemplated by the Registration
Statement and/or applicable Prospectus Supplement and in accordance with the
terms of the warrant agreement relating to such Warrants and at a price therein
provided for, will be legally issued, fully paid and nonassessable.

        (4) The Company has authority pursuant to its Certificate of
Incorporation to issue Depositary Shares to be registered under the Registration
Statement and when (a) a deposit agreement substantially as described in the
Registration Statement has been duly executed and delivered by the Company and a
depositary, (b) the depositary receipts representing the Depositary Shares in
the form contemplated and authorized by


<PAGE>   3
SDL, Inc.
August 11, 1999
Page 3



such deposit agreement have been duly executed and delivered by such depositary
and delivered to and paid for by the purchasers thereof in the manner
contemplated by the Registration Statement and/or the applicable prospectus
supplement and (c) all corporate action necessary for the issuance of such
Depositary Shares and the underlying Preferred Stock has been taken (including
but not limited to action establishing the preferences, limitations and relative
voting and other rights of such Preferred Stock prior to issuance thereof), such
Depositary Shares will be legally issued and will entitle the holders thereof to
the rights specified in the deposit agreement relating to such Depositary
Shares.

        (5) The Company has authority to issue the Debt Securities to be
registered under the Registration Statement and when (a) the applicable
provisions of the Act and such state "blue sky" or securities laws as may be
applicable have been complied with and (b) the Debt Securities have been issued
and delivered for value as contemplated in the Registration Statement, such Debt
Securities will be legally issued and will be binding obligations of the
Operating Partnership.

        To the extent that the obligations of the Company under the deposit
agreement or the obligations of the Company as obligor under an indenture may be
dependent upon such matters, we have assumed for purposes of this opinion (i)
that the applicable depositary or trustee, as the case may be, is duly
organized, validly existing and in good standing under the laws of its
jurisdiction of organization and is duly qualified to engage in the activities
contemplated by the applicable deposit agreement or indenture as the case may
be, (ii) that such deposit agreement or indenture, as the case may be, has been
duly authorized, executed and delivered by and constitutes the legal, valid and
binding obligation of such depositary or trustee, as the case may be,
enforceable in accordance with its respective terms, (iii) that such depositary
or trustee, as the case may be, is in compliance, generally and with respect to
acting as a depositary or trustee, respectively, under the applicable deposit
agreement or indenture, with all applicable laws and regulations and (iv) that
such depositary or trustee has the requisite organizational and legal power and
authority to perform its obligations under the applicable deposit agreement or
indenture, as the case may be.

        We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to the reference to us under the heading "Legal
Matters" in the Registration Statement, the Prospectus constituting a part
thereof and any amendments thereto.

                                            Very truly yours,


                                            /s/ Morrison & Foerster LLP
                                            ------------------------------------
                                            Morrison & Foerster LLP

<PAGE>   1
                                                                    EXHIBIT 12.1


                                    SDL, INC.


                STATEMENT SETTING FORTH THE COMPUTATION OF RATIOS
                          OF EARNINGS TO FIXED CHANGES

                          (In thousands, except ratios)

<TABLE>
<CAPTION>
                                                               Years Ended December 31,                    Six Months
                                                                                                              Ended
                                            1994         1995          1996         1997          1998    June 30, 1999
                                          --------     --------      --------     --------      --------  -------------
<S>                                       <C>          <C>           <C>          <C>           <C>       <C>
Income (loss) before taxes                $  3,448     $   (897)     $ 11,191     $(23,936)     $  8,986     $  8,657

Add - Fixed charges                          1,126        1,484           691          968         1,265          914
                                          --------     --------      --------     --------      --------     --------

Income(loss) before taxes
  and fixed charges                       $  4,574     $    587      $ 11,882     $(22,968)     $ 10,251     $  9,571
                                          ========     ========      ========     ========      ========     ========


Fixed charges:
       Interest                           $    855     $  1,103      $    196     $    248      $    440     $    501
       expense
       Estimated interest
         component of rental expense           271          381           495          720           825          413
                                          --------     --------      --------     --------      --------     --------

Total                                     $  1,126     $  1,484      $    691     $    968      $  1,265     $    914
                                          ========     ========      ========     ========      ========     ========

Ratio of earnings to fixed charges(1)         4.1x          n/a         17.2x          n/a          8.1x        10.5x
</TABLE>


(1) Earnings were insufficient to cover fixed charges by approximately $23.9
million and $0.9 million in the years ended December 31, 1997 and 1995,
respectively.



<PAGE>   1
                                                                    EXHIBIT 23.1


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-3) and related Prospectus of SDL, Inc. for the
registration of $300,000,000 of its common stock, preferred stock, depositary
shares, warrants, and debt securities and to the incorporation by reference
therein of our reports dated January 29, 1999, with respect to the consolidated
financial statements of SDL, Inc. incorporated by reference in its Annual Report
(Form 10-K/A) for the year ended December 31, 1998 and the related financial
statement schedule included therein, and our report dated January 29, 1999
(except Note 16, as to which the date is May 14, 1999 and except for paragraph 4
of Note 1 and Note 17, as to which the date is May 18, 1999) with respect to the
supplemental consolidated financial statements and schedule of SDL, Inc.
included in its Current Report on Form 8-K dated May 18, 1999, filed with the
Securities and Exchange Commission.



                                          /s/ Ernst & Young LLP
                                          --------------------------------------
                                          /s/ ERNST & YOUNG LLP


San Jose, California
August 6, 1999


<PAGE>   1
                                                                    EXHIBIT 23.2



                CONSENT OF ARTHUR ANDERSEN, INDEPENDENT AUDITORS

As independent auditors, we hereby consent to the reference to our firm under
the caption "Experts" in the Registration Statement (Form S-3) and related
Prospectus of SDL, Inc. for the registration of $300,000,000 of its common
stock, preferred stock, depositary shares, warrants, and debt securities and to
the incorporation by reference therein of our report dated 15 December 1998,
with respect to the consolidated financial statements of IOC International plc
as at 30 September 1998 and 1997 and for the three years ended 30 September 1998
included in SDL, Inc.'s Current Report on Form 8-K dated May 18, 1999, filed
with the Securities and Exchange Commission. It should be noted that we have not
audited any financial statements of IOC International plc subsequent to 30
September 1998 or performed any audit procedures subsequent to the date of our
report.



/s/ Arthur Andersen
Chartered Accountants
Cambridge England
6 August 1999


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