VAN KAMPEN AMERICAN CAPITAL EQUITY OPPORTUNITY TRUST SER 124
487, 1999-01-05
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                              MEMORANDUM OF CHANGES
                     VAN KAMPEN FOCUS PORTFOLIOS, SERIES 124

         The Prospectus filed with Amendment No. 1 of the Registration Statement
on Form S-6 has been revised to reflect information regarding the deposit of Van
Kampen Focus Portfolios, Series 124 on January 5, 1999. An effort has been made
to set forth below each of the major changes and also to reflect the same by
blacklining the marked counterparts of the Prospectus submitted with the
Amendment.

Pages 2-3.            The "Summary of Essential Financial Information"
                      and "Fee Table" sections have been completed.

Pages 4-8.            Certain revisions have been made and each 
                      "Portfolio" and the notes thereto has been
                      completed.

Pages 9-11.           The descriptions of the portfolio securities have
                      been completed.

Pages 12-13.          The  Report of Independent Certified Public
                      Accountants' and Statements of Condition have
                      been completed.

FILE NO. 333-68655
CIK #1025275

                       SECURITIES AND EXCHANGE COMMISSION
                           Washington, D.C. 20549-1004

                          Amendment No. 1 to Form S-6

For Registration under the Securities Act of 1933 of Securities of Unit
Investment Trusts Registered on Form N-8B-2.

A.  Exact Name of Trust:  VAN KAMPEN FOCUS PORTFOLIOS, SERIES 124

B.  Name of Depositor:    VAN KAMPEN FUNDS INC.

C.  Complete address of Depositor's principal executive offices:

    One Parkview Plaza
    Oakbrook Terrace, Illinois 60181

D.  Name and complete address of agents for service:

    CHAPMAN AND CUTLER                   VAN KAMPEN FUNDS INC.
    Attention:  Mark J. Kneedy           Attention:  Don G. Powell, Chairman
    111 West Monroe Street               One Parkview Plaza
    Chicago, Illinois  60603             Oakbrook Terrace, Illinois  60181

E. Title of securities being registered: Units of fractional undivided
   beneficial interest.

F. Approximate date of proposed sale to the public:

             AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THE
                             REGISTRATION STATEMENT

/ X /      Check box if it is proposed that this filing will become effective at
- ----       2:00 p.m. on January 5, 1999 pursuant to Rule 487.

   
The Dow 30SM  Index Trust, Series 6
The Dow 30SM Index & Treasury Trust, Series 8
    

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

   
   Van Kampen Focus Portfolios, Series 124 includes the unit investment trusts
described above (the "Trusts"). Each Trust seeks to increase the value of your
investment and provide dividend income by investing in a diversified portfolio
of stocks. The Dow 30SM Index & Treasury Trust also seeks to preserve capital by
investing a portion of its portfolio in U.S. Treasury obligations. Of course, we
cannot guarantee that a Trust will achieve its objective.
    

    The Units are not deposits or obligations of any bank or government agency
and are not guaranteed.

   
                                 January 5, 1999
    

       You should read this prospectus and retain it for future reference.

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

    The Securities and Exchange Commission has not approved or disapproved of
the Units or passed upon the adequacy or accuracy of this prospectus. Any
contrary representation is a criminal offense.

<TABLE>
   
                   Summary of Essential Financial Information
                                 January 5, 1999
<CAPTION>

                                                                                                           The Dow
                                                                                        The Dow         30SM Index &
                                                                                      30SM Index          Treasury
                                                                                         Trust              Trust
                                                                                    ---------------   -------------------
<S>                                                                                 <C>               <C>
Public Offering Price
Aggregate value of Securities per Unit (1)                                          $          9.55   $              8.91
Sales charge                                                                                   0.45                   .42
Public offering price per Unit (2)                                                  $         10.00   $              9.33

Trust Information
Initial number of Units (3)                                                                  15,175                16,363
Aggregate value of Securities (1)                                                   $       144,918   $           145,809
Estimated initial distribution per Unit (4)                                         $          0.02   $              0.01
Estimated annual dividends per Unit (4)                                             $       0.16114   $           0.07127
Redemption price per Unit (5)                                                       $          9.55   $              8.91
Mandatory Termination Dates                                                         January 5, 2009       August 15, 2014
</TABLE>

General Information

Initial Date of Deposit                                          January 5, 1999
Record Dates                    Tenth day of March, June, September and December
Distribution Dates       Twenty-fifth day of March, June, September and December
    

- --------------------------------------------------------------------------------
(1)Each stock in a Trust is valued at the last closing sale price on its
   principal trading exchange, or at the last asked price if not listed, on the
   day before the Initial Date of Deposit. U.S. Treasury obligations are valued
   at the offer side evaluation on the day before the Initial Date of Deposit.
   You will bear all or a portion of the expenses incurred in organizing and
   offering your Trust. The Public Offering Price includes the estimated amount
   of these costs. The Trustee will deduct these expenses from your Trust at the
   end of the initial offering period (approximately four months). The estimated
   amount for each Trust is described on the next page.
(2)The Public Offering Price will include any accumulated dividends or cash in
   the Income or Capital Accounts of a Trust. (3) At the Evaluation Time on the
   Initial Date of Deposit the number of Units may be adjusted so that the
   Public Offering Price per Unit equals $10. The number of Units and fractional
   interest of each Unit in a Trust will increase or decrease to the extent of
   any adjustment. In order to guarantee a Unit value of $11 at Trust maturity,
   we will not adjust the Public Offering Price of The Dow 30SM Index & Treasury
   Trust.
(4)This estimate is based on the most recently declared quarterly dividends or
   interim and final dividends accounting for any foreign withholding taxes.
   Actual dividends may vary due to a variety of factors. See "Risk Factors".
(5)The redemption price includes the estimated organizational and offering
   costs. The redemption price will not included these costs after the initial
   offering period.

   
                                    Fee Table

                                                                     The Dow
                                                      The Dow     30SM Index &
                                                    30SM Index      Treasury
                                                       Trust          Trust
                                                    -----------    -----------
 Transaction Fees (as % of offering price)
Maximum sales charge                                   4.50%          4.50%
                                                    ===========    ===========
Maximum sales charge on reinvested dividends           0.00%          0.00%
                                                    ===========    ===========

Estimated Organizational Costs per Unit            $    0.09226   $    0.03836
                                                    ===========    ===========

Estimated Annual Expenses per Unit
Trustee's fee and operating expenses               $    0.02085   $    0.01306
Supervisory and evaluation fees                    $    0.00500   $    0.00500
                                                    -----------    -----------
Estimated annual expenses per Unit                 $    0.02585   $    0.01806
                                                    ===========    ===========

Estimated Costs Over Time
One year                                           $         57   $          51
Three years                                        $         63   $          55
Five years                                         $         69   $          59
Ten years                                          $         87   $          71
    

   This fee table is intended to assist you in understanding the costs that you
will bear and to present a comparison of fees. The "Estimated Costs Over Time"
example illustrates the expenses you would pay on a $1,000 investment assuming a
5% annual return and redemption at the end of each period. This example assumes
that you reinvest all distributions at the end of each year. Of course, you
should not consider this example a representation of actual past or future
expenses or annual rate of return which may differ from those assumed in this
example. The sales charge and expenses are described under "Public Offering" and
"Trust Operating Expenses".

The Dow 30SM Index Trust

   The Trust seeks to increase the value of your Units over time and provide
dividend income by investing in a portfolio of common stocks of the companies in
the Dow Jones Industrial AverageSM. These stocks are some of the most
widely-held and well-capitalized companies in the world. We believe that The Dow
30SM stocks have historically provided a consistent and more conservative source
of dividend income and capital appreciation than many other types of equity
securities.

   o Portfolio of "blue chip" stocks
   o Cross section of American industrial companies
   o May help outpace inflation

<CHART APPEARS HERE>

   The Trust initially includes a portfolio that replicates the Dow Jones
Industrial AverageSM. During the Trust's life, we will change the portfolio to
reflect any change in the component stocks in The DowSM. We will not change the
portfolio to reflect any change in the weightings of the components within The
DowSM during the Trust's life. However, the Dow Jones Industrial AverageSM has
always been based on one share of each component stock.

   As with any investment, we cannot guarantee that the Trust will achieve its
objective. The value of your Units may fall below the price you paid for the
Units. The performance of the Trust will differ from the performance of The
DowSM because the Trust includes expenses and a sales charge. You should read
the "Risk Factors" section before you invest.

   The Dow Jones Industrial AverageSM. Charles H. Dow first unveiled his
industrial stock average on May 26, 1896. Dow Jones & Company, Inc. first
published the Dow Jones Industrial AverageSM in The Wall Street Journal on
October 7, 1896. Initially consisting of just 12 stocks, The DowSM expanded to
20 stocks in 1916 and its present size of 30 stocks on October 1, 1928. The most
recent change to The DowSM occurred March 17, 1997, when Dow Jones replaced four
companies in the index. The companies included in The DowSM have remained
relatively constant over time.

   The DowSM stocks are all major factors in their industries and are widely
held by individuals and institutions. The stocks represent about one-fifth of
the market value of all U.S. stocks. All of The DowSM stocks currently trade on
the New York Stock Exchange. These stocks represent about one-fourth of the
value of all stocks listed on the Exchange. The value of The DowSM at the
beginning of 1929 was 248.8 and had risen to a level of 7,539.07 by the end of
August 1998.

   The editors of The Wall Street Journal select the components of The DowSM.
The editors have traditionally considered all companies that are not in the
transportation or utilities sectors for inclusion in the index. In choosing a
new component, the editors look among substantial industrial companies with a
history of successful growth and wide interest among investors. They believe
that stability of composition enhances the index. Whenever the editors change
one stock, they typically review the other stocks. Of course, we cannot
guarantee that they will follow this process or consider these factors in the
future.

    "Dow JonesSM", "Dow Jones Industrial AverageSM", "The Dow 30SM", "The DowSM"
and "DJIASM" are proprietary to and service marks of Dow Jones & Company, Inc.
and have been licensed for use for certain purposes by the Trust. The Trust is
not sponsored, endorsed, sold or promoted by Dow Jones and Dow Jones makes no
representation regarding the advisability of investing in the Trust.

<TABLE>
   
<CAPTION>
Portfolio
- -----------------------------------------------------------------------------------------------------------------
                                                                                Current             Cost of
Number                                                      Market Value        Dividend            Securities
of Shares       Name of Issuer (1)                          per Share (2)       Yield (3)           to Trust (2)
- ----------      -----------------------------------         -------------       ----------          -------------
<S>             <C>                                         <C>                 <C>                 <C>
        65      AlliedSignal, Inc.                          $     43.438              1.38%         $   2,823.44
        65      Aluminum Company of America (ALCOA)               73.750              1.36              4,793.75
        65      American Express Co.                             101.500              0.89              6,597.50
        65      AT&T Corp.                                        77.938              1.69              5,065.94
        65      Boeing Co.                                        32.938              1.70              2,140.94
        65      Caterpillar, Inc.                                 47.375              2.53              3,079.38
        65      Chevron Corp.                                     82.063              2.97              5,334.06
        65      Citigroup, Inc.                                   50.313              1.43              3,270.31
        65      Coca-Cola Co.                                     67.188              0.89              4,367.19
        65      DuPont E.I. de Nemours                            55.250              2.53              3,591.25
        65      Eastman Kodak Co.                                 71.188              2.47              4,627.19
        65      Exxon Corp.                                       72.625              2.26              4,720.63
        65      General Electric Co.                             100.563              1.39              6,536.56
        65      General Motors Corp.                              70.875              2.82              4,606.88
        65      Goodyear Tire & Rubber Co.                        52.250              2.30              3,396.25
        65      Hewlett-Packard                                   68.938              0.93              4,480.94
        65      International Business Machines (IBM)            183.000              0.48             11,895.00
        65      International Paper Co.                           41.938              2.38              2,725.94
        65      J.P. Morgan & Co., Inc.                          107.188              3.69              6,967.19
        65      Johnson & Johnson                                 82.813              1.21              5,382.81
        65      McDonalds Corp.                                   76.938              0.47              5,000.94
        65      Merck & Co., Inc.                                149.750              1.44              9,733.75
        65      Minnesota Mining & Manufacturing (3M)             74.625              2.95              4,850.63
        65      Phillip Morris Co., Inc.                          52.563              3.35              3,416.56
        65      Procter & Gamble Co.                              90.000              1.27              5,850.00
        65      Sears, Roebuck & Co.                              42.938              2.14              2,790.94
        65      Union Carbide Corp.                               41.375              2.18              2,689.38
        65      United Technologies Corp.                        108.000              1.33              7,020.00
        65      Wal-Mart                                          80.625              0.38              5,240.63
        65      Walt Disney Co.                                   29.563              0.71              1,921.56
- ----------                                                                                          ------------
     1,950                                                                                         $  144,917.50
==========                                                                                          ============
</TABLE>
    

See "Notes to Portfolios".

The Dow 30SM Index & Treasury Trust

   The Trust seeks to increase the value of your Units over time and provide
dividend income while also providing protection of principal. The Trust invests
in a portfolio of common stocks of the companies in the Dow Jones Industrial
AverageSM on the day before the Initial Date of Deposit and U.S. Treasury
obligations. The Trust seeks to provide protection of your principal by
combining an investment in blue chip stocks with U.S. Treasury obligations.

   The Dow Jones Industrial AverageSM. The DowSM stocks are all major factors in
their industries and are widely held by individuals and institutions. These
stocks are some of the most widely-held and well-capitalized companies in the
world. We believe that The DowSM stocks have historically provided a consistent
and more conservative source of dividend income and capital appreciation than
many other types of equity securities. All of The DowSM stocks currently trade
on the New York Stock Exchange. More information about The DowSM is presented
under "The Dow 30SM Index Trust".

<CHART APPEARS HERE>

   Approximately half of the initial portfolio replicates the Dow Jones
Industrial AverageSM on the day before the Initial Date of Deposit. The
component stocks or the weightings of the stocks in The DowSM may change from
time to time. We will not change the Trust portfolio to reflect any change in
The DowSM.

   "Dow JonesSM", "Dow Jones Industrial AverageSM", "The Dow 30SM", "The DowSM"
and "DJIASM" are proprietary to and service marks of Dow Jones & Company, Inc.
and have been licensed for use for certain purposes by the Trust. The Trust is
not sponsored, endorsed, sold or promoted by Dow Jones and Dow Jones makes no
representation regarding the advesability of investing in the Trust.

   Principal Protection. By investing approximately half of the initial
portfolio in U.S. Treasury obligations, the Trust offers an investment similar
to The Dow 30SM Index Trust while also seeking protection of principal. We
structured the portfolio so that you should receive at least $11 per Unit if you
hold your Units through maturity of the Treasury obligations. This feature
provides you with total principal protection if you purchase Units for $11 or
less (including any sales charge).

   The Treasury obligations do not pay interest while they are outstanding.
However, you will be subject to tax with respect to amortization of original
issue discount on the Treasury obligations as if a distribution had occurred.
You should read the "Taxation" section for more information.

    As with any investment, we cannot guarantee that the Trust will achieve its
objective. The value of your Units may fall below the price you paid for the
Units. You should read the "Risk Factors" section before you invest.

<TABLE>
   
<CAPTION>
Portfolio
- -----------------------------------------------------------------------------------------------------------------
                                                                                Current             Cost of
Number                                                      Market Value        Dividend            Securities
of Shares       Name of Issuer (1)                          per Share (2)       Yield (3)           to Trust (2)
- ----------      -----------------------------------         -------------       ----------          -------------
<S>             <C>                                         <C>                 <C>                 <C>
        31      AlliedSignal, Inc.                          $     43.438              1.38%         $   1,346.56
        31      Aluminum Company of America (ALCOA)               73.750              1.36              2,286.25
        31      American Express Co.                             101.500              0.89              3,146.50
        31      AT&T Corp.                                        77.938              1.69              2,416.06
        31      Boeing Co.                                        32.938              1.70              1,021.06
        31      Caterpillar, Inc.                                 47.375              2.53              1,468.63
        31      Chevron Corp.                                     82.063              2.97              2,543.94
        31      Citigroup, Inc.                                   50.313              1.43              1,559.69
        31      Coca-Cola Co.                                     67.188              0.89              2,082.81
        31      DuPont E.I. de Nemours                            55.250              2.53              1,712.75
        31      Eastman Kodak Co.                                 71.188              2.47              2,206.81
        31      Exxon Corp.                                       72.625              2.26              2,251.38
        31      General Electric Co.                             100.563              1.39              3,117.44
        31      General Motors Corp.                              70.875              2.82              2,197.13
        31      Goodyear Tire & Rubber Co.                        52.250              2.30              1,619.75
        31      Hewlett-Packard                                   68.938              0.93              2,137.06
        31      International Business Machines (IBM)            183.000              0.48              5,673.00
        31      International Paper Co.                           41.938              2.38              1,300.06
        31      J.P. Morgan & Co., Inc.                          107.188              3.69              3,322.81
        31      Johnson & Johnson                                 82.813              1.21              2,567.19
        31      McDonalds Corp.                                   76.938              0.47              2,385.06
        31      Merck & Co., Inc.                                149.750              1.44              4,642.25
        31      Minnesota Mining & Manufacturing (3M)             74.625              2.95              2,313.38
        31      Phillip Morris Co., Inc.                          52.563              3.35              1,629.44
        31      Procter & Gamble Co.                              90.000              1.27              2,790.00
        31      Sears, Roebuck & Co.                              42.938              2.14              1,331.06
        31      Union Carbide Corp.                               41.375              2.18              1,282.63
        31      United Technologies Corp.                        108.000              1.33              3,348.00
        31      Wal-Mart                                          80.625              0.38              2,499.38
        31      Walt Disney Co.                                   29.563              0.71                916.44
- ----------                                                                                          ------------
       930                                                                                          $  69,114.52
==========

Maturity
Value           Name of Issuer and Maturity Date (1)
- ----------      --------------------------------------------------------------------------
$  180,000      U.S. Treasury Strips maturing August 15, 2014                                          76,694.76
==========                                                                                          ------------
                                                                                                   $  145,809.28
                                                                                                    ============
</TABLE>
    

See "Notes to Portfolios".

Notes to Portfolios

   
   (1) The Securities are initially represented by "regular way" contracts for
the performance of which an irrevocable letter of credit has been deposited with
the Trustee. Contracts to acquire Securities were entered into on January 4,
1999 and have a settlement date of January 7, 1999 (see "The Trusts").
    

   (2) The market value of each Security is based on the closing sale price on
the applicable exchange on the day prior to the Initial Date of Deposit or the
last asked price if not listed on an exchange. Other information regarding the
Securities, as of the Initial Date of Deposit, is as follows:

   
                                                                Profit
                                            Cost to           (Loss) To
                                            Sponsor            Sponsor
                                          ----------          ----------
The Dow 30SM Index Trust                  $  144,922          $      (4)
The Dow 30SM Index & Treasury Trust       $  145,952          $    (143)
    

   (3)Current Dividend Yield for each Security is based on the estimated annual
dividends per share and the Security's market value as of the close of trading
on the day prior to the Initial Date of Deposit. Estimated annual dividends per
share are calculated by annualizing the most recently declared dividends or by
adding the most recent interim and final dividends declared and reflect any
foreign withholding taxes.

   
    The Securities. A brief description of each of the issuers of the stocks in
each Trust appears below.

    AlliedSignal Inc. AlliedSignal Inc. and its subsidiaries manufacture
aerospace and automotive products and engineered materials. The company's
products include chemicals, fibers, plastics, and advanced materials.
AlliedSignal's aerospace products include engines and electronic and avionics
systems. The company's automotive products include truck brake systems and
turbocharging systems.

   Aluminum Company of America (Alcoa). Aluminum Company of America (Alcoa) is
an integrated aluminum company. The Company produces alumina with close
proximity of bauxite mines to its refineries in Australia, Jamaica, Suriname,
and Brazil. Alcoa has over 180 operating locations in 28 countries and serves
markets in developing and industrialized economies.

   American Express Company. American Express Company, through its subsidiaries,
provides travel related services, financial advisory services, and international
banking services throughout the world. The company provides the "American
Express" Card and the "Optima" Card, the "American Express" Travelers Cheque,
and other products and services.

   AT&T Corporation. AT&T Corporation offers communication services and
products. The company provides voice, data, and video telecommunications
services to consumers, large and small businesses, and government entities. AT&T
and its subsidiaries furnish regional, domestic, international, and local
telecommunication services. The company also provides cellular telephone and
wireless services, as well as other services.

   The Boeing Company. The Boeing Company, together with its subsidiaries,
develops, produces, and markets commercial jet aircraft, and provides related
support services to the commercial airline industry worldwide. The company also
researches, develops, produces, modifies, and supports information, space, and
defense systems, including military aircraft, helicopters, space and missile
systems, and others.

    Caterpillar, Inc. Caterpillar, Inc. designs, manufactures, and markets
earthmoving and construction machines, as well as mining and agricultural
machinery. The company provides financing alternatives for its equipment.
Caterpillar's machines are distributed through 65 dealers in the United States
and 132 internationally. Machines are used for marine, agricultural, petroleum,
industrial, and other applications.

   Chevron Corporation. Chevron Corporation explores for, develops, and produces
crude oil and natural gas. The company also refines crude oil into finished
petroleum products, as well as markets and transports crude oil, natural gas,
and petroleum products. Chevron manufactures and markets a variety of chemicals
for industrial use and mines for coal. The company operates in the United States
and approximately 90 countries.

    Citigroup, Inc. Citigroup, Inc. is a diversified financial services holding
company that provides investment services, including asset management, consumer
finance services, property and casualty insurance services, and life insurance
services. The company's subsidiaries include Salomon Smith Barney Holdings,
Inc., Commercial Credit Company, Travelers Property & Casualty Corp., and other
companies.

   The Coca-Cola Company. The Coca Cola Company manufactures, markets, and
distributes soft drink concentrates and syrups. The company manufactures and
sells soft drink and non-carbonated beverages, including fountain syrups, some
finished beverages, and certain juice and juice-drink products. Coca-Cola sells
its concentrates and syrups for bottled and canned beverages to authorized
bottling and canning operations.

    E. I. du Pont de Nemours and Company. E.I. du Pont de Nemours and Company
operates in six industry segments which include chemicals, fibers, polymers,
petroleum, life sciences, and diversified businesses. The company, through its
subsidiaries, conducts fully integrated petroleum operations and produces
petroleum liquids. Du Pont and its subsidiaries operate in approximately 70
countries.

    Eastman Kodak Company. Eastman Kodak Company develops, manufactures, and
markets consumer and commercial imaging products. The company's imaging systems
include films, photographic papers, processing services, photographic chemicals,
cameras, and projectors. Kodak also develops digital camera systems which do not
use silver halide film technology.

   Exxon Corporation. Exxon Corporation explores for and produces crude oil and
natural gas; manufactures petroleum products; and transports and sells crude
oil, natural gas, and petroleum products. The company also manufactures and
markets basic petrochemicals, including olefins and aromatics, as well as
supplies specialty rubbers and additives for fuels and lubricants.

   General Electric Company. General Electric Company develops, manufactures,
and markets products for the generation, distribution and utilization of
electricity. The company, through General Electric Capital Services, Inc.,
offers a wide variety of financial services including mutual fund management,
financing, asset management, and insurance. General Electric also owns the
National Broadcasting Company.

   General Motors Corporation. General Motors Corporation manufactures and sells
vehicles worldwide under the "Chevrolet", "Buick", "Cadillac", "Oldsmobile",
"Pontiac", "Saturn", and "GMC" names. The company also offers financing,
insurance, and mortgage banking, as well as manufactures satellites,
locomotives, and heavy-duty transmissions.

   The Goodyear Tire & Rubber Company. The Goodyear Tire & Rubber Company
manufactures tires and rubber automotive parts. The company produces new and
retread tires, inner tubes, automotive belts and hoses, molded parts, and foam
cushioning. Goodyear sells its tires to automobile manufacturers and through
retail stores to the replacement market.

   Hewlett-Packard Company. Hewlett-Packard Company designs, manufactures, and
services products and systems for measurement, computation, and communications.
The company's products include computers, calculators, workstations, printers,
disc and tape drives, and medical diagnostic and monitoring devices.
Hewlett-Packard sells its products around the world.

   International Business Machines Corporation. International Business Machines
Corporation develops, manufactures, and sells information processing products.
The company's products include computers and microelectronic technology,
software, networking systems, and information technology-related services.
International Business Machines operates around the world.

    International Paper Company. International Paper Company manufactures
printing and writing paper, pulp, tissue, paperboard, packaging, and wood
products. The company also manufactures non-woven papers, specialty chemicals,
and specialty panels and laminated products. International Paper sells its
products primarily in the United States, Europe, and the Pacific Rim.

    J.P. Morgan & Co. Incorporated. J.P. Morgan & Co. Incorporated offers a
variety of financial services to businesses, governments and individuals. The
company provides advice, raises capital and trades financial instruments. J.P.
Morgan also manages investment assets for business enterprises, governments,
financial institutions and private clients.

   Johnson & Johnson. Johnson & Johnson manufactures and sells a broad range of
products in health care and other fields. The company's business is divided into
the consumer, professional, and pharmaceutical segments. Products include
contraceptives, therapeutics, veterinary products, dental products, surgical
instruments, dressings apparel, and nonprescription drugs.

   McDonald's Corporation. McDonald's Corporation develops, operates, franchises
and services a worldwide system of restaurants. These restaurants prepare,
assemble, package and sell a limited menu of quickly-prepared, moderately-priced
foods. There are over 22,000 restaurants in the United States and 109 countries
worldwide. Food items include hamburgers, chicken, salads, breakfast foods and
beverages.

    Merck & Co., Inc. Merck & Co., Inc. is a worldwide research-intensive health
products company. The company operates through five divisions: human health,
managed pharmaceutical care, manufacturing, research, and vaccine. Merck's
products include treatments for osteoporosis and high blood pressure. The
company markets its products under brand names such as "Cozar", "Fosamax",
"Trusopt", and "Pepcid AC".

   Minnesota Mining and Manufacturing Company. Minnesota Mining and
Manufacturing Company is a diversified manufacturer of industrial, commercial
and health care products. The company produces and markets more than 60,000
products worldwide. Minnesota's products include "Post-it" Notes, "Wetordry"
sandpaper, "Scotchgard" fabric, film and photo protectors, "Thinsulate"
insulation products and "Alge Block" copper roofing.

    Philip Morris Companies, Inc. Philip Morris Companies, Inc. is a consumer
packaged goods company. The company operates through five subsidiaries. Philip
Morris' products include "Bull's-Eye", "Breakstone's", "Kraft", "Cambridge" and
"Marlboro" cigarettes, "Cracker Barrel" and "Polly-O" cheeses, "Crystal Light",
"Maxwell House", and "Miller", "Milwaukee's Best" and "Meister Brau" beer.

   The Procter & Gamble Company. The Procter & Gamble Company manufactures and
markets consumer products throughout the world. The company operates through
five business segments: laundry and cleaning, paper, beauty care, food and
beverages, and health care. Brand names include "Tide", ", "Bounty", "Charmin",
"Pampers", "Vidal Sassoon", "Cover Girl", "Folgers", "Jif", "Scope", "Vicks" and
other products.

    Sears, Roebuck and Co. Sears, Roebuck and Co. retails apparel, home and
automotive products and services. The company operates approximately 840
full-line stores and more than 2,000 specialized retail outlets across the
United States.

   Union Carbide Corporation. Union Carbide Corporation produces basic chemicals
and polymers, which are materials that undergo one or more further conversions
by customers before reaching consumers. The company's products are used for
paints and coatings, packaging, wire and cable, household products, personal
care, and other industries. Union Carbide operates in more than 40 countries.

    United Technologies Corporation. United Technologies Corporation
manufactures and sells products and services to the aerospace, building, and
automotive industries. The company's products include "Pratt & Whitney" jet
engines, "Sikorsky" helicopters, "Otis" elevators, "Carrier" heating and air
conditioning systems, "Hamilton Standard" flight and space systems, and
automotive systems and components.

    Wal-Mart Stores, Inc. Wal-Mart Stores, Inc. operates discount stores and
"Supercenters", as well as "Sam's Clubs". The company's "Wal-Mart" discount
stores and "Supercenters" offer merchandise such as apparel, housewares, small
appliances, electronics and hardware. Wal-Mart operates in the United States,
Canada, Argentina, Brazil, Germany, Mexico and Puerto Rico, as well as joint
ventures in China and Korea.

   The Walt Disney Company. The Walt Disney Company is a diversified worldwide
entertainment company with operations in creative content, broadcasting and
theme parks and resorts. The company produces motion pictures, television
programs and musical recordings; licenses its intellectual property; and
publishes books and magazines. Disney also operates ABC radio and television and
theme parks in the US and overseas.
    

               REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

   
    To the Board of Directors of Van Kampen Funds Inc. and the Unitholders of
Van Kampen Focus Portfolios, Series 124:

    We have audited the accompanying statements of condition and the related
portfolios of Van Kampen Focus Portfolios, Series 124 as of January 5, 1999. The
statements of condition and portfolios are the responsibility of the Sponsor.
Our responsibility is to express an opinion on such financial statements based
on our audit.
    

    We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. Our procedures included
confirmation of an irrevocable letter of credit deposited to purchase securities
by correspondence with the Trustee. An audit also includes assessing the
accounting principles used and significant estimates made by the Sponsor, as
well as evaluating the overall financial statement presentation.

   
    We believe our audit provides a reasonable basis for our opinion. In our
opinion, the financial statements referred to above present fairly, in all
material respects, the financial position of Van Kampen Focus Portfolios, Series
124 as of January 5, 1999, in conformity with generally accepted accounting
principles.
    

                               GRANT THORNTON LLP

   
   Chicago, Illinois
   January 5, 1999

                             STATEMENTS OF CONDITION
                              As of Janaury 5, 1999

                                                                   The Dow
                                                    The Dow      30SM Index &
                                                  30SM Index       Treasury
                                                     Trust           Trust
                                                --------------- --------------
 INVESTMENT IN SECURITIES
Contracts to purchase Securities (1)           $       144,918   $      145,809
                                                 --------------- --------------
  Total                                        $       144,918   $      145,809
                                                 =============== ==============


LIABILITIES AND INTEREST OF UNITHOLDERS
Liabilities--
  Organizational costs (2)                     $         1,400   $          628
Interest of Unitholders--
  Cost to investors (3)                                151,750          152,667
  Less: Gross underwriting commission and
    organizational costs (2)(3)(4)                       8,232            7,486
                                                 --------------- --------------
  Net interest to Unitholders (3)                      143,518          145,181
                                                 --------------- --------------
Total                                          $       144,918   $      145,809
                                                 =============== ==============
    

(1)The value of the Securities is determined by Interactive Data Corporation
   on the bases set forth under "Public Offering--Offering Price". The contracts
   to purchase Securities are collateralized by separate irrevocable letters of
   credit which have been deposited with the Trustee.
(2)A portion of the Public Offering Price represents an amount sufficient to
   pay for all or a portion of the costs incurred in establishing a Trust. The
   amount of these costs are set forth in the "Fee Table". A distribution will
   be made as of the close of the initial offering period to an account
   maintained by the Trustee from which this obligation of the investors will be
   satisfied.
(3)The aggregate public offering price and the aggregate sales charge are
   computed on the bases set forth under "Public Offering-- Offering Price".
(4)Assumes the maximum sales charge.

THE TRUSTS
- --------------------------------------------------------------------------------

   The Trusts were created under the laws of the State of New York pursuant to a
Trust Indenture and Trust Agreement (the "Trust Agreement"), dated the date of
this Prospectus (the "Initial Date of Deposit"), among Van Kampen Funds Inc., as
Sponsor, Van Kampen Investment Advisory Corp., as Supervisor, The Bank of New
York, as Trustee, and American Portfolio Evaluation Services, a division of Van
Kampen Investment Advisory Corp., as Evaluator.

   The Trusts offer investors the opportunity to purchase Units representing
proportionate interests in portfolios of actively traded securities. A Trust may
be an appropriate medium for investors who desire to participate in a portfolio
of securities with greater diversification than they might be able to acquire
individually.

   On the Initial Date of Deposit, the Sponsor deposited delivery statements
relating to contracts for the purchase of the Securities and an irrevocable
letter of credit in the amount required for these purchases with the Trustee. In
exchange for these contracts the Trustee delivered to the Sponsor documentation
evidencing the ownership of Units of the Trusts. Unless otherwise terminated as
provided in the Trust Agreement, the Trusts will terminate on the Mandatory
Termination Date and any remaining Securities will be liquidated or distributed
by the Trustee within a reasonable time. As used in this Prospectus the term
"Securities" means the securities (including contracts to purchase these
securities) listed in "Portfolio" for each Trust and any additional securities
deposited into each Trust.

   Additional Units of a Trust may be issued at any time by depositing in the
Trust (i) additional Securities, (ii) contracts to purchase Securities together
with cash or irrevocable letters of credit or (iii) cash (or a letter of credit)
with instructions to purchase additional Securities. As additional Units are
issued by a Trust, the aggregate value of the Securities will be increased and
the fractional undivided interest represented by each Unit will be decreased.
The Sponsor may continue to make additional deposits into a Trust following the
Initial Date of Deposit provided that the additional deposits will be in amounts
which will maintain, as nearly as practicable, the same percentage relationship
among the number of shares (or percentage of par value) of each Security in the
Trust's portfolio that existed immediately prior to the subsequent deposit.
Investors may experience a dilution of their investments and a reduction in
their anticipated income because of fluctuations in the prices of the Securities
between the time of the deposit and the purchase of the Securities and because
the Trusts will pay the associated brokerage or acquisition fees.

   Each Unit of a Trust initially offered represents an undivided interest in
that Trust. To the extent that any Units are redeemed by the Trustee or
additional Units are issued as a result of additional Securities being deposited
by the Sponsor, the fractional undivided interest in that Trust represented by
each unredeemed Unit will increase or decrease accordingly, although the actual
interest in the Trust will remain unchanged. Units will remain outstanding until
redeemed upon tender to the Trustee by Unitholders, which may include the
Sponsor, or until the termination of the Trust Agreement.

    Each Trust consists of (a) the Securities (including contracts for the
purchase thereof) listed under the applicable "Portfolio" as may continue to be
held from time to time in the Trust, (b) any additional Securities acquired and
held by the Trust pursuant to the provisions of the Trust Agreement and (c) any
cash held in the related Income and Capital Accounts. Neither the Sponsor nor
the Trustee shall be liable in any way for any failure in any of the Securities.

OBJECTIVES AND SECURITIES SELECTION
- --------------------------------------------------------------------------------

   Each Trust seeks to increase the value of your investment and provide
dividend income by investing in a diversified portfolio of stocks. The Dow 30SM
Index & Treasury Trust also seeks to preserve capital by investing a portion of
its portfolio in U.S. Treasury obligations. We cannot guarantee that a Trust
will achieve its objective.

   You should note that we applied the selection criteria to the Securities for
inclusion in the Trusts as of the Initial Date of Deposit. After this date, the
Securities may no longer meet the selection criteria. Should a Security no
longer meet the selection criteria, we will generally not remove the Security
from its Trust portfolio. However, we will adjust the portfolio of The Dow 30SM
Index Trust to reflect changes in the components of the Dow Jones Industrial
AverageSM.

    A balanced investment portfolio incorporates various style and
capitalization characteristics. We offer unit trusts with a variety of styles
and capitalizations to meet your needs. We determine style characteristics
(growth or value) based on the criteria used in selecting the Trust portfolio.
Generally, a growth portfolio includes companies in a growth phase of their
business with increasing earnings. A value portfolio generally includes
companies with low relative price-earnings ratios that we believe are
undervalued. We determine market capitalizations as follows based on the
weighted median market capitalization of a portfolio: Small-Cap-- less than $1
billion; Mid-Cap-- $1 billion to $5 billion; and Large-Cap-- over $5 billion. We
determine all style and capitalization characteristics as of the Initial Date of
Deposit and the characteristics may vary thereafter. We will not remove a
Security from a Trust as a result of any change in characteristics.

RISK FACTORS
- --------------------------------------------------------------------------------

   Price Volatility. The Trusts invest in stocks of U.S. and foreign companies.
The value of Units will fluctuate with the value of these stocks and may be more
or less than the price you originally paid for your Units. The market value of
stocks sometimes moves up or down rapidly and unpredictably. Because the Trusts
are unmanaged, the Trustee will not sell stocks in response to market
fluctuations as is common in managed investments. As with any investment, we
cannot guarantee that the performance of a Trust will be positive over any
period of time.

   Dividends. Stocks represent ownership interests in the issuers and are not
obligations of the issuers. Common stockholders have a right to receive
dividends only after the company has provided for payment of its creditors,
bondholders and preferred stockholders. Common stocks do not assure dividend
payments. Dividends are paid only when declared by an issuer's board of
directors and the amount of any dividend may vary over time.

   Treasury Obligations. The U.S. Treasury obligations in The Dow 30SM Index &
Treasury Trust are U.S. Treasury Strips. These are bonds that have been stripped
of their unmatured interest coupons. These bonds represent the right to receive
a fixed payment from the U.S. government at the bond's maturity date. These
securities are backed by the full faith and credit of the U.S. government. This
guarantee does not apply to the market value of the Treasury obligations or
Units of the Trust. The U.S. government issues these Treasury obligations at a
deep discount to par value because the obligations do not make periodic interest
payments. In effect, these obligations implicitly reinvest earnings during their
life at a fixed yield. This eliminates the ability to reinvest earnings at
higher rates in the future, if available. The value of the Treasury obligations
may also fluctuate to a greater extent than securities that make regular
interest payments.

   
     Year 2000 Readiness Disclosure. The following two paragraphs constitute
"Year 2000 Readiness Disclosure" within the meaning of the Year 2000 Information
and Readiness Disclosure Act of 1998. If computer systems used by the Sponsor,
Evaluator, Supervisor or Trustee or other service providers to the Trusts do not
properly process date-related information after December 31, 1999, the resulting
difficulties could adversely impact the Trusts. This is commonly known as the
"Year 2000 Problem". The Sponsor, Evaluator, Supervisor and Trustee are taking
steps to address this problem and to obtain reasonable assurances that other
service providers to the Trusts are taking comparable steps. We cannot guarantee
that these steps will be sufficient to avoid any adverse impact on the Trusts.
This problem may impact corporations to varying degrees based on factors such as
industry sector and degree of technological sophistication. We cannot predict
what impact, if any, this problem will have on the issuers of the Securities.

     In addition, computer failures throughout the financial services industry
beginning January 1, 2000 could have a detrimental affect on the markets for the
Securities. Improperly functioning trading systems may result in settlement
problems and liquidity issues. Moreover, corporate and governmental data
processing errors may adversely affect issuers and overall economic
uncertainties. Remediation costs will affect the earnings of individual issuers.
These costs could be substantial. Issuers may report these costs inconsistently
in U.S. and foreign financial markets. All of these issuers could adversely
affect the Securities and the Trusts.
    

PUBLIC OFFERING
- --------------------------------------------------------------------------------

   General. Units are offered at the Public Offering Price which includes the
underlying value of the Securities, the sales charge, and cash, if any, in the
Income and Capital Accounts. The "Fee Table" describes the sales charge in
detail. Beginning on January 5, 2000, the secondary market sales charge will be
4.20%. This sales charge will decrease by 0.3% on each following January 5, to a
minimum of 1.50%.

The initial offering period sales charge is reduced as follows:

       Aggregate
     Dollar Amount
   of Units Purchased*                    Sales Charge
- ---------------------                     ----------------
    $50,000 - $99,999                         4.20%
 $100,000 - $249,999                          4.00
 $250,000 - $499,999                          3.50
 $500,000 - $999,999                          3.00
  $1,000,000 or more                          2.50
- ---------------
*The breakpoint sales charges are also applied on a Unit basis utilizing a
breakpoint equivalent in the above table of $10 per Unit and will be applied on
whichever basis is more favorable to the investor.

   Any sales charge reduction is the responsibility of the selling broker,
dealer or agent. An investor may aggregate purchases of Units of the Trusts for
purposes of qualifying for volume purchase discounts listed above. The reduced
sales charge structure will also apply on all purchases by the same person from
any one dealer of units of Van Kampen-sponsored unit investment trusts which are
being offered in the initial offering period (a) on any one day (the "Initial
Purchase Date") or (b) on any day subsequent to the Initial Purchase Date if the
units purchased are of a unit investment trust purchased on the Initial Purchase
Date. In the event units of more than one trust are purchased on the Initial
Purchase Date, the aggregate dollar amount of such purchases will be used to
determine whether purchasers are eligible for a reduced sales charge. Such
aggregate dollar amount will be divided by the public offering price per unit of
each respective trust purchased to determine the total number of units which
such amount could have purchased of each individual trust. Purchasers must then
consult the applicable trust's prospectus to determine whether the total number
of units which could have been purchased of a specific trust would have
qualified for a reduced sales charge and the amount of such reduction. To
determine the applicable sales charge reduction it is necessary to accumulate
all purchases made on the Initial Purchase Date and all purchases made in
accordance with (b) above. Units purchased in the name of the spouse of a
purchaser or in the name of a child of such purchaser ("immediate family
members") will be deemed to be additional purchases by the purchaser for the
purposes of calculating the applicable sales charge. The reduced sales charges
will also be applicable to a trustee or other fiduciary purchasing securities
for one or more trust estate or fiduciary accounts.

   Units may be purchased in the primary or secondary market at the Public
Offering Price less the concession the Sponsor typically allows to brokers and
dealers for purchases by (1) investors who purchase Units through registered
investment advisers, certified financial planners and registered broker-dealers
who in each case either charge periodic fees for financial planning, investment
advisory or asset management service, or provide such services in connection
with the establishment of an investment account for which a comprehensive "wrap
fee" charge is imposed, (2) bank trust departments investing funds over which
they exercise exclusive discretionary investment authority and that are held in
a fiduciary, agency, custodial or similar capacity, (3) any person who for at
least 90 days, has been an officer, director or bona fide employee of any firm
offering Units for sale to investors or their immediate family members (as
described above) and (4) officers and directors of bank holding companies that
make Units available directly or through subsidiaries or bank affiliates.
Notwithstanding anything to the contrary in this Prospectus, such investors,
bank trust departments, firm employees and bank holding company officers and
directors who purchase Units through this program will not receive sales charge
reductions for quantity purchases.

   A purchaser desiring to purchase during a 13 month period $500,000 or more of
any combination of series of Van Kampen unit investment trusts may qualify for a
reduced sales charge by signing a nonbinding Letter of Intent with any single
broker-dealer. After signing a Letter of Intent, at the date total purchases,
less redemptions, of units of any combination of series of Van Kampen unit
investment trusts by a purchaser (including units purchased in the name of the
spouse of a purchaser or in the name of a child of such purchaser under 21 years
of age) exceed $500,000, the selling broker-dealer, bank or other will credit
the unitholder with cash as a retroactive reduction of the sales charge on such
units equal to the amount which would have been paid for the total aggregated
sales amount. If a purchase does not complete the required purchases under the
Letter of Intent within the 13 month period, no such retroactive sales charge
reduction shall be made.

   During the initial offering period, unitholders of any Van Kampen-sponsored
unit investment trust may utilize their redemption or termination proceeds to
purchase Units of all Trusts at the Public Offering Price per Unit less 1%.

   Employees, officers and directors (including their spouses, children,
grandchildren, parents, grandparents, siblings, mothers-in-law, fathers-in-law,
sons-in-law, daughters-in-law, and trustees, custodians or fiduciaries for the
benefit of such persons) of the Van Kampen Funds Inc. and its affiliates,
dealers and their affiliates and vendors providing services to the Sponsor may
purchase Units at the Public Offering Price less the applicable dealer
concession.

   The minimum purchase is 100 Units (25 Units for retirement accounts) but may
vary by selling firm. However, in connection with fully disclosed transactions
with the Sponsor, the minimum purchase requirement will be that number of Units
set forth in the contract between the Sponsor and the related broker or agent.

   Offering Price. The Public Offering Price of Units will vary from the amounts
stated under "Summary of Essential Financial Information" in accordance with
fluctuations in the prices of the underlying Securities in the Trusts. The
initial price of the Securities was determined by Interactive Data Corporation,
a firm regularly engaged in the business of evaluating, quoting or appraising
comparable securities. The Evaluator will generally determine the value of the
Securities as of the Evaluation Time on each business day and will adjust the
Public Offering Price of Units accordingly. This Public Offering Price will be
effective for all orders received prior to the Evaluation Time on each business
day. The Evaluation Time is the close of the New York Stock Exchange on each
Trust business day. Orders received by the Trustee or Sponsor for purchases,
sales or redemptions after that time, or on a day which is not a business day,
will be held until the next determination of price. The term "business day", as
used herein and under "Rights of Unitholders--Redemption of Units", excludes
Saturdays, Sundays and holidays observed by the New York Stock Exchange.

   The aggregate underlying value of the equity securities in a Trust during the
initial offering period is determined on each business day by the Evaluator in
the following manner: If the equity securities are listed on a national or
foreign securities exchange, this evaluation is generally based on the closing
sale prices on that exchange (unless it is determined that these prices are
inappropriate as a basis for valuation) or, if there is no closing sale price on
that exchange, at the closing ask prices. If the equity securities are not
listed on a national or foreign securities exchange or, if so listed and the
principal market therefor is other than on the exchange, the evaluation shall
generally be based on the current ask price on the over-the-counter market
(unless it is determined that these prices are inappropriate as a basis for
evaluation). If current ask prices are unavailable, the evaluation is generally
determined (a) on the basis of current ask prices for comparable securities, (b)
by appraising the value of the equity securities on the ask side of the market
or (c) by any combination of the above. The aggregate underlying value of U.S.
Treasury obligations during the initial offering period is determined on each
business day by the Evaluator based on their net offering prices. If net
offering prices are unavailable, then the evaluations will be based on (1)
offering prices for comparable securities, (2) by determining the value of the
obligations on the offer side of the market or (3) by any combination of the
above. The value of any foreign securities is based on the applicable currency
exchange rate as of the Evaluation Time. The value of the Securities for
purposes of secondary market transactions and redemptions is described under
"Rights of Unitholders--Redemption of Units".

   In offering the Units to the public, neither the Sponsor nor any
broker-dealers are recommending any of the individual Securities but rather the
entire pool of Securities in a Trust, taken as a whole, which are represented by
the Units.

   Unit Distribution. Units will be distributed to the public by the Sponsor,
broker-dealers and others at the Public Offering Price. Units repurchased in the
secondary market, if any, may be offered by this Prospectus at the secondary
market Public Offering Price in the manner described above.

   The Sponsor intends to qualify Units for sale in a number of states. Brokers,
dealers and others will be allowed a concession or agency commission in
connection with the distribution of Units during the initial offering period of
3.20% of the Public Offering Price. Volume concession or agency commissions of
any additional .30% will be given to an broker-dealer who purchases from the
Sponsor at least $100,000 (or 10,000 Units) on the Initial Date of Deposit or
$250,000 (or 25,000 Units) on any day after that date.

   In addition to the amounts above, during the initial offering period any firm
that distributes 500,000 - 999,999 Units of a Trust will receive additional
compensation of $.005 per Unit; any firm that distributes 1,000,000 - 1,999,999
Units of such Trust will receive additional compensation of $.01 per Unit; any
firm that distributes 2,000,000 - 2,999,999 Units of such Trust will receive
additional compensation of $.015 per Unit; any firm that distributes 3,000,000
Units or more of such Trust will receive additional compensation of $.02 per
Unit. This additional compensation will be paid by the Sponsor out of its own
assets at the end of the initial offering period.

   Any discount provided to investors will be borne by the selling dealer or
agent as indicated under "General" above. For transactions involving unitholders
of other Van Kampen unit investment trusts who use their redemption or
termination proceeds to purchase Units of the Trusts, the total concession or
agency commission will amount to 2.25% per Unit. For all secondary market
transactions the total concession or agency commission will amount to 70% of the
sales charge. Notwithstanding anything to the contrary herein, in no case shall
the total of any concessions, agency commissions and any additional compensation
allowed or paid to any broker, dealer or other distributor of Units with respect
to any individual transaction exceed the total sales charge applicable to such
transaction. The Sponsor reserves the right to reject, in whole or in part, any
order for the purchase of Units and to change the amount of the concession or
agency commission to dealers and others from time to time.

   Broker-dealers of the Trusts, banks and/or others may be eligible to
participate in a program in which such firms receive from the Sponsor a nominal
award for each of their representatives who have sold a minimum number of units
of unit investment trusts created by the Sponsor during a specified time period.
In addition, at various times the Sponsor may implement other programs under
which the sales forces of brokers, dealers, banks and/or others may be eligible
to win other nominal awards for certain sales efforts, or under which the
Sponsor will reallow to such brokers, dealers, banks and/or others that sponsor
sales contests or recognition programs conforming to criteria established by the
Sponsor, or participate in sales programs sponsored by the Sponsor, an amount
not exceeding the total applicable sales charges on the sales generated by such
persons at the public offering price during such programs. Also, the Sponsor in
its discretion may from time to time pursuant to objective criteria established
by the Sponsor pay fees to qualifying entities for certain services or
activities which are primarily intended to result in sales of Units of the
Trusts. Such payments are made by the Sponsor out of its own assets, and not out
of the assets of any Trust. These programs will not change the price Unitholders
pay for their Units or the amount that a Trust will receive from the Units sold.

   Sponsor Compensation. The Sponsor will receive a gross sales commission equal
to the total sales charge applicable to each transaction. Any sales charge
discount provided to investors will be borne by the selling dealer or agent. In
addition, the Sponsor will realize a profit or loss as a result of the
difference between the price paid for the Securities by the Sponsor and the cost
of the Securities to each Trust on the Initial Date of Deposit as well as on
subsequent deposits. See "Notes to Portfolios". The Sponsor has not participated
as sole underwriter or as manager or as a member of the underwriting syndicates
or as an agent in a private placement for any of the Securities. The Sponsor may
realize profit or loss as a result of the possible fluctuations in the market
value of the Securities, since all proceeds received from purchasers of Units
are retained by the Sponsor. In maintaining a secondary market, the Sponsor will
realize profits or losses in the amount of any difference between the price at
which Units are purchased and the price at which Units are resold (which price
includes the applicable sales charge) or from a redemption of repurchased Units
at a price above or below the purchase price. Cash, if any, made available to
the Sponsor prior to the date of settlement for the purchase of Units may be
used in the Sponsor's business and may be deemed to be a benefit to the Sponsor,
subject to the limitations of the Securities Exchange Act of 1934.

   An affiliate of the Sponsor may have participated in a public offering of one
or more of the Securities. The Sponsor, an affiliate or their employees may have
a long or short position in these Securities or related securities. An affiliate
may act as a specialist or market maker for these Securities. An officer,
director or employee of the Sponsor or an affiliate may be an officer or
director for issuers of the Securities.

   Market for Units. Although it is not obligated to do so, the Sponsor
currently intends to maintain a market for Units and to purchase Units at the
secondary market repurchase price (which is described under "Right of
Unitholders--Redemption of Units"). The Sponsor may discontinue purchases of
Units or discontinue purchases at this price at any time. In the event that a
secondary market is not maintained, a Unitholder will be able to dispose of
Units by tendering them to the Trustee for redemption at the Redemption Price.
See "Rights of Unitholders--Redemption of Units". Unitholders should contact
their broker to determine the best price for Units in the secondary market.
Units sold prior to the time the entire deferred sales charge has been collected
will be assessed the amount of any remaining deferred sales charge at the time
of sale. The Trustee will notify the Sponsor of any tendered of Units for
redemption. If the Sponsor's bid in the secondary market equals or exceeds the
Redemption Price per Unit, it may purchase the Units not later than the day on
which Units would have been redeemed by the Trustee. The Sponsor may sell
repurchased Units at the secondary market Public Offering Price per Unit.

    Tax-Sheltered Retirement Plans. Units are available for purchase in
connection with certain types of tax-sheltered retirement plans, including
Individual Retirement Accounts for the individuals, Simplified Employee Pension
Plans for employees, qualified plans for self-employed individuals, and
qualified corporate pension and profit sharing plans for employees. The minimum
purchase for these accounts is reduced to 25 Units but may vary by selling firm.
The purchase of Units may be limited by the plans' provisions and does not
itself establish such plans.

RIGHTS OF UNITHOLDERS
- --------------------------------------------------------------------------------

   Distributions. Dividends and any net proceeds from the sale of Securities
received by a Trust will generally be distributed to Unitholders on each
Distribution Date to Unitholders of record on the preceding Record Date. These
dates are listed under "Summary of Essential Financial Information". A person
becomes a Unitholder of record on the date of settlement (generally three
business days after Units are ordered). Unitholders may elect to receive
distributions in cash or to have distributions reinvested into additional Units.
Distributions may also be reinvested into Van Kampen mutual funds. See "Rights
of Unitholders--Reinvestment Option".

   Dividends received by a Trust are credited to the Income Account of the
Trust. Other receipts (e.g., capital gains, proceeds from the sale of
Securities, etc.) are credited to the Capital Account. Proceeds received on the
sale of any Securities, to the extent not used to meet redemptions of Units or
pay deferred sales charges, fees or expenses, will be distributed to
Unitholders. Proceeds received from the disposition of any Securities after a
record date and prior to the following distribution date will be held in the
Capital Account and not distributed until the next distribution date. Any
distribution to Unitholders consists of each Unitholder's pro rate share of the
available cash in the Income and Capital Accounts as of the related Record Date.

   Reinvestment Option. Unitholders may have distributions automatically
reinvested in additional Units under the Automatic Reinvestment Option (to the
extent Units may be lawfully offered for sale in the state in which the
Unitholder resides) through two options. Brokers and dealers can use the
Dividend Reinvestment Service through Depository Trust Company or purchase the
Automatic Reinvestment Option CUSIP, if available. Unitholders will be subject
to any remaining deferred sales charge payments due on Units. To participate in
this reinvestment option, a Unitholder must file with the Trustee a written
notice of election, together with any certificate representing Units and other
documentation that the Trustee may then require, at least five days prior to the
related Record Date. A Unitholder's election will apply to all Units owned by
the Unitholder and will remain in effect until changed by the Unitholder. If
Units are unavailable for reinvestment, distributions will be paid in cash.
Purchases of additional Units made pursuant to the reinvestment plan will be
made at the net asset value for Units as of the Evaluation Time on the
Distribution Date.

   In addition, under the Guaranteed Reinvestment Option Unitholders may elect
to have distributions automatically reinvested in certain Van Kampen mutual
funds (the "Reinvestment Funds"). Each Reinvestment Fund has investment
objectives which differ from those of the Trusts. The prospectus relating to
each Reinvestment Fund describes its investment policies and how to begin
reinvestment. A Unitholder may obtain a prospectus for the Reinvestment Funds
from the Sponsor. Purchases of shares of a Reinvestment Fund will be made at a
net asset value computed on the Distribution Date. Unitholders with an existing
Guaranteed Reinvestment Option account (whereby a sales charge is imposed on
distribution reinvestments) may transfer their existing account into a new
account which allows purchases of Reinvestment Fund shares at net asset value.

   A participant may elect to terminate his or her reinvestment plan and receive
future distributions in cash by notifying the Trustee in writing no later than
five days before a distribution date. The Sponsor, each Reinvestment Fund, and
its investment adviser shall have the right to suspend or terminate these
reinvestment plans at any time.

   Redemption of Units. A Unitholder may redeem all or a portion of his Units by
tender to the Trustee at its Unit Investment Trust Division, 101 Barclay Street,
20th Floor, New York, New York 10286. Certificates must be tendered to the
Trustee, duly endorsed or accompanied by proper instruments of transfer with
signature guaranteed (or by providing satisfactory indemnity in connection with
lost, stolen or destroyed certificates) and by payment of applicable
governmental charges, if any. On the seventh day following the tender, the
Unitholder will be entitled to receive in cash an amount for each Unit equal to
the Redemption Price per Unit next computed on the date of tender. The "date of
tender" is deemed to be the date on which Units are received by the Trustee,
except that with respect to Units received by the Trustee after the Evaluation
Time or on a day which is not a Trust business day, the date of tender is deemed
to be the next business day.

   Unitholders tendering 1,000 or more Units of a Trust for redemption may
request an in kind distribution of equity securities equal to the Redemption
Price per Unit on the date of tender. Trusts generally do not offer in kind
distributions of portfolio securities that are held in foreign markets or U.S.
Treasury obligations. An in kind distribution will be made by the Trustee
through the distribution of each of the equity securities in book-entry form to
the account of the Unitholder's broker-dealer at Depository Trust Company.
Amounts representing fractional shares or U.S. Treasury obligations will be
distributed in cash. The Trustee may adjust the number of shares of any Security
included in a Unitholder's in kind distribution to facilitate the distribution
of whole shares.

   The Trustee may sell Securities to satisfy Unit redemptions. To the extent
that Securities are redeemed in kind or sold, the size of a Trust will be, and
the diversity of a Trust may be, reduced. Sales may be required at a time when
Securities would not otherwise be sold and may result in lower prices than might
otherwise be realized. The price received upon redemption may be more or less
than the amount paid by the Unitholder depending on the value of the Securities
at the time of redemption. Special federal income tax consequences will result
if a Unitholder requests an in kind distribution. See "Taxation".

   The Redemption Price per Unit and the secondary market repurchase price per
Unit are equal to the pro rate share of each Unit in each Trust determined on
the basis of (i) the cash on hand in the Trust, (ii) the value of the Securities
in the Trust and (iii) dividends receivable on the Securities in the Trust
trading ex-dividend as of the date of computation, less (a) amounts representing
taxes or other governmental charges payable out of the Trust, (b) the accrued
expenses of the Trust and (c) any unpaid deferred sales charge payments. During
the initial offering period, the redemption price and the secondary market
repurchase price will also include estimated organizational costs. For these
purposes, the Evaluator may determine the value of equity securities in the
following manner: If the equity securities are listed on a national or foreign
securities exchange, this evaluation is generally based on the closing sale
prices on that exchange (unless it is determined that these prices are
inappropriate as a basis for valuation) or, if there is no closing sale price on
that exchange, at the closing bid prices. If the equity securities are not so
listed or, if so listed and the principal market therefore is other than on the
exchange, the evaluation may be based on the current bid price on the
over-the-counter market. If current bid prices are unavailable or inappropriate,
the evaluation may be determined (a) on the basis of current bid prices for
comparable securities, (b) by appraising the equity securities on the bid side
of the market or (c) by any combination of the above. The Evaluator may
determine the value of U.S. Treasury obligations for these purposes in the same
manner as described under "Public Offering--Offering Price" on the bid side of
the market. The value of any foreign securities is based on the applicable
currency exchange rate as of the Evaluation Time.

   The right of redemption may be suspended and payment postponed for any period
during which the New York Stock Exchange is closed, other than for customary
weekend and holiday closings, or any period during which the SEC determines that
trading on that Exchange is restricted or an emergency exists, as a result of
which disposal or evaluation of the Securities is not reasonably practicable, or
for other periods as the SEC may permit.

   Certificates. Ownership of Units is evidenced in book entry form unless a
Unitholder makes a written request to the Trustee that ownership be in
certificate form. Units are transferable by making a written request to the
Trustee and, in the case of Units in certificate form, by presentation of the
certificate to the Trustee properly endorsed or accompanied by a written
instrument or instruments of transfer. A Unitholder must sign the written
request, and certificate or transfer instrument, exactly as his name appears on
the records of the Trustee and on the face of any certificate with the signature
guaranteed by a participant in the Securities Transfer Agents Medallion Program
("STAMP") or a signature guarantee program accepted by the Trustee. In certain
instances the Trustee may require additional documents such as, but not limited
to, trust instruments, certificates of death, appointments as executor or
administrator or certificates of corporate authority. Fractional certificates
will not be issued. The Trustee may require a Unitholder to pay a reasonable fee
for each certificate reissued or transferred and to pay any governmental charge
that may be imposed in connection with each transfer or interchange. Destroyed,
stolen, mutilated or lost certificates will be replaced upon delivery to the
Trustee of satisfactory indemnity, evidence of ownership and payment of expenses
incurred. Mutilated certificates must be surrendered to the Trustee for
replacement.

   Reports Provided. Unitholders will receive a statement of dividends and other
amounts received by a Trust for each distribution. Within a reasonable time
after the end of each year, each person who was a Unitholder during that year
will receive a statement describing dividends and capital received, actual Trust
distributions, Trust expenses, a list of the Securities and other Trust
information. Unitholders may obtain the Evaluator's evaluations of the
Securities upon request.

TRUST ADMINISTRATION
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   Portfolio Administration. The Trusts are not managed funds and, except as
provided in the Trust Agreement, Securities generally will not be sold or
replaced. The Sponsor may, however, direct that Securities be sold in certain
limited circumstances to protect the Trust based on advice from the Supervisor.
These situations may include events such as the issuer having defaulted on
payment of any of its outstanding obligations or the price of a Security has
declined to such an extent or other credit factors exist so that in the opinion
of the Sponsor retention of the Security would be detrimental to the Trust. In
addition, the Trustee may sell Securities to redeem Units or pay Trust expenses
or deferred sales charges. The Trustee must reject any offer for securities or
property in exchange for the Securities. If securities or property are
nonetheless acquired by a Trust, the Sponsor may direct the Trustee to sell the
securities or property and distribute the proceeds to Unitholders or to accept
the securities or property for deposit in the Trust. Should any contract for the
purchase of any of the Securities fail, the Sponsor will (unless substantially
all of the moneys held in the Trust to cover the purchase are reinvested in
substitute Securities in accordance with the Trust Agreement) refund the cash
and sales charge attributable to the failed contract to all Unitholders on or
before the next distribution date.

   With respect to The Dow 30SM Index Trust, purchases and sales of Securities
will generally be made in an effort to maintain, to the extent practical, a
portfolio that reflects the current components of the Dow Jones Industrial
AverageSM. If this Trust receives any securities or other property relating to
the Securities in the Trust (such as those acquired in a merger or spin-off),
the Trustee will sell the securities or other property and reinvest the proceeds
in shares of the Security related to the transaction. If a Security is removed
from the Dow Jones Industrial AverageSM, the Trustee will sell the Security and
may reinvest the proceeds into any new securities added as components of the Dow
Jones Industrial AverageSM or into the other Securities if a new component is
not added.

   With respect to The Dow 30SM Index Trust, the Sponsor may direct the
reinvestment of proceeds of the sale of Securities if the sale is the direct
result of serious adverse credit factors which, in the opinion of the Sponsor,
would make retention of the Securities detrimental to the Trust. In such as
case, the Sponsor may, but is not obligated to, direct the reinvestment of sale
proceeds in any other securities that meet the criteria for inclusion in these
Trusts on the Initial Date of Deposit. The Sponsor may also instruct the Trustee
to take action necessary to ensure that these Trusts continue to satisfy the
qualifications of a regulated investment company and to avoid imposition of tax
on undistributed income of these Trusts.

   To the extent practicable, the Supervisor may (but is not obligated to)
designate Securities to be sold by the Trustee in order to maintain the
proportionate relationship among the number of shares of individual issues of
Securities in a Trust. To the extent this is not practicable, the composition
and diversity of the Securities in the Trust may be altered. In order to obtain
the best price for a Trust, it may be necessary for the Supervisor to specify
minimum amounts (generally 100 shares) in which blocks of Securities are to be
sold. In effecting purchases and sales of a Trust's portfolio securities, the
Sponsor may direct that orders be placed with and brokerage commissions be paid
to brokers, including brokers which may be affiliated with the Trusts, the
Sponsor or dealers participating in the offering of Units. In addition, in
selecting among firms to handle a particular transaction, the Sponsor may take
into account whether the firm has sold or is selling units of unit investment
trusts which is sponsors.

   Amendment of the Trust Agreement. The Trustee and the Sponsor may amend the
Trust Agreement without the consent of Unitholders to correct any provision
which may be defective or to make other provisions that will not adversely
affect Unitholders (as determined in good faith by the Sponsor and the Trustee).
The Trust Agreement may not be amended to increase the number of Units or permit
acquisition of securities in addition to or substitution for the Securities
(except as provided in the Trust Agreement). The Trustee will notify Unitholders
of any amendment.

   Termination. Each Trust will terminate on the Mandatory Termination Date or
upon the sale or other disposition of the last Security held in the Trust. A
Trust may be terminated at any time with consent of Unitholders representing
two-thirds of the outstanding Units or by the Trustee when the value of the
Trust is less than $500,000 ($3,000,000 if the value of the Trust has exceeded
$15,000,000) (the "Minimum Termination Value"). Unitholders will be notified of
any termination. The Trustee may begin to sell Securities in connection with a
Trust termination nine business days before, and no later than, the Mandatory
Termination Date. Approximately thirty days before this date, the Trustee will
notify Unitholders of the termination and provide a form enabling qualified
Unitholders to elect an in kind distribution of Securities. See "Rights of
Unitholders--Redemption of Units". This form must be returned at least five
business days prior to the Mandatory Termination Date. Unitholders will receive
a final cash distribution within a reasonable time after the Mandatory
Termination Date (unless the Unitholder has elected an in kind distribution or
is a participant in the final Rollover). All distributions will be net of Trust
expenses and costs. Unitholders will receive a final distribution statement
following termination. The Information Supplement contains further information
regarding termination of the Trusts. See "Additional Information".

   Limitations on Liabilities. The Sponsor, Evaluator, Supervisor and Trustee
are under no liability for taking any action or for refraining from taking any
action in good faith pursuant to the Trust Agreement, or for errors in judgment,
but shall be liable only for their own willful misfeasance, bad faith or gross
negligence (negligence in the case of the Trustee) in the performance of their
duties or by reason of their reckless disregard of their obligations and duties
hereunder. The Trustee is not be liable for depreciation or loss incurred by
reason of the sale by the Trustee of any of the Securities. In the event of the
failure of the Sponsor to act under the Trust Agreement, the Trustee may act
thereunder and is not be liable for any action taken by it in good faith under
the Trust Agreement. The Trustee is not liable for any taxes or other
governmental charges imposed on the Securities, on it as Trustee under the Trust
Agreement or on a Trust which the Trustee may be required to pay under any
present or future law of the United States of America or of any other taxing
authority having jurisdiction. In addition, the Trust Agreement contains other
customary provisions limiting the liability of the Trustee. The Trustee, Sponsor
and Supervisor may rely on any evaluation furnished by the Evaluator and have no
responsibility for the accuracy thereof. Determinations by the Evaluator shall
be made in good faith upon the basis of the best information available to it.

    Sponsor. Van Kampen Funds Inc., a Delaware corporation, is the Sponsor of
the Trust. The Sponsor is an indirect subsidiary of Morgan Stanley Dean Witter &
Co. Van Kampen Funds Inc. specializes in the underwriting and distribution of
unit investment trusts and mutual funds with roots in money management dating
back to 1926. The Sponsor is a member of the National Association of Securities
Dealers, Inc. and has offices at One Parkview Plaza, Oakbrook Terrace, Illinois
60181, (630) 684-6000 and 2800 Post Oak Boulevard, Houston, Texas 77056, (713)
993-0500. As of November 30, 1997, the total stockholders' equity of Van Kampen
Funds Inc. was $132,381,000 (audited). The Information Supplement contains
additional information about the Sponsor.

   If the Sponsor shall fail to perform any of its duties under the Trust
Agreement or become incapable of acting or shall become bankrupt or its affairs
are taken over by public authorities, then the Trustee may (i) appoint a
successor Sponsor at rates of compensation deemed by the Trustee to be
reasonable and not exceeding amounts prescribed by the Securities and Exchange
Commission, (ii) terminate the Trust Agreement and liquidate the Trusts as
provided therein or (iii) continue to act as Trustee without terminating the
Trust Agreement.

   Trustee. The Trustee is The Bank of New York, a trust company organized under
the laws of New York. The Bank of New York has its unit investment trust
division offices at 101 Barclay Street, New York, New York 10286 (800) 221-7668.
The Bank of New York is subject to supervision and examination by the
Superintendent of Banks of the State of New York and the Board of Governors of
the Federal Reserve System, and its deposits are insured by the Federal Deposit
Insurance Corporation to the extent permitted by law. Additional information
regarding the Trustee is set forth in the Information Supplement, including the
Trustee's qualifications and duties, its ability to resign, the effect of a
merger involving the Trustee and the Sponsor's ability to remove and replace the
Trustee. See "Additional Information".

    Performance Information. The Sponsor may from time to time in its
advertising and sales materials compare the then current estimated returns on
the Trusts and returns over specified time periods on other trusts (which may
show performance net of expenses and charges which the Trusts would have
charged) with returns on other taxable investments such as the common stocks
comprising the Dow Jones Industrial Average, the S&P 500, other investment
indices, corporate or U.S. government bonds, bank CDs, money market accounts or
money market funds, or with performance data from Lipper Analytical Services,
Inc., Morningstar Publications, Inc. or various publications, each of which has
characteristics that may differ from those of the Trusts. Information on
percentage changes in the dollar value of Units may be included from time to
time in advertisements, sales literature, reports and other information
furnished to current or prospective Unitholders. Total return figures may not be
averaged and may not reflect deduction of the sales charge, which would decrease
return. No provision is made for any income taxes payable. Past performance may
not be indicative of future results. The Trust portfolios are not managed and
Unit price and return fluctuate with the value of common stocks in the
portfolios, so there may be a gain or loss when Units are sold. As with other
performance data, performance comparisons should not be considered
representative of the Trust's relative performance for any future period.

TAXATION
- --------------------------------------------------------------------------------

   The Dow 30SM Index Trust. The Dow 30SM Index Trust intends to elect and
qualify on a continuing basis for special federal income tax treatment as a
"regulated investment company" under the Internal Revenue Code of 1986, as
amended (the "Code"). If the Trust so qualifies and timely distributes to
Unitholders 90% or more of its taxable income (without regard to its net capital
gain, i.e., the excess of its net long-term capital gain over its net short-term
capital loss), it will not be subject to federal income tax on the portion of
its taxable income (including any net capital gain) that it distributes to
Unitholders. In addition, to the extent the Trust timely distributes to
Unitholders at least 98% of its taxable income (including any net capital gain),
it will not be subject to the 4% excise tax on certain undistributed income of
"regulated investment companies." Because the Trust intends to timely distribute
its taxable income (including any net capital gain), it is anticipated that the
Trust will not be subject to federal income tax or the excise tax.

   Distributions to Unitholders of the Trust's taxable income, other than
distributions which are designated as capital gain dividends, will be taxable as
ordinary income to Unitholders, except that to the extent that distributions to
a Unitholder in any year exceed the Trust's current and accumulated earnings and
profits, they will be treated as a return of capital and will reduce the
Unitholder's basis in his Units and, to the extent that they exceed his basis,
will be treated as a gain from the sale of his Units as discussed below.

   Although distributions generally will be treated as distributed when paid,
distributions declared in October, November or December payable to Unitholders
of record on a specified date in one of those months and paid during January of
the following year will be treated as having been distributed by the Trust (and
received by the Unitholder) on December 31 of the year such distributions are
declared.

   Distributions of the Trust's net capital gain which are properly designated
as capital gain dividends by the Trust will be taxable to Unitholders as
long-term capital gain, regardless of the length of time the Units have been
held by a Unitholder. A Unitholder may recognize a taxable gain or loss if the
Unitholder sells or redeems his Units. Any gain or loss arising from (or treated
as arising from) the sale or redemption of Units will generally be a capital
gain or loss, except in the case of a dealer or a financial institution. The
Internal Revenue Service Restructuring and Reform Act of 1998 (the "1998 Tax
Act") provides that for taxpayers other than corporations, net capital gain
(which is defined as net long-term capital gain over net short-term capital loss
for the taxable year) is generally subject to a maximum marginal stated tax rate
of 20% (10% in the case of certain taxpayers in the lowest tax bracket). Capital
gain or loss is long-term if the holding period for the asset is more than one
year, and is short-term if the holding period for the asset is one year or less.
The date on which a Unit is acquired (i.e., the "trade date") is excluded for
purposes for determining the holding period of the Unit. Capital gains realized
from assets held for one year or less are taxed at the same rates as ordinary
income. Note, however, that the 1998 Tax Act and the Taxpayer Relief Act of 1997
(the "1997 Tax Act") provide that the application of the rules described above
in the case of pass-through entities such as the Trust will be prescribed in
future Treasury Regulations. The Internal Revenue Service has released
preliminary guidance which provides that, in general, pass-through entities such
as the Trust may designate their capital gains dividends as either a 20% rate
gain distribution, an unrecaptured section 1250 gain distribution or a 28% rate
gain distribution, depending on the nature of the gain received by the
pass-through entity. Unitholders should consult their own tax advisors as to the
tax rate applicable to capital gain dividends. Additionally, note that if a
Unitholder holds Units for six months or less and subsequently sells such Units
at a loss, the loss will be treated as a long-term capital loss to the extent
that any long-term capital gain distribution is made with respect to such Units
during the six-month period or less that the Unitholder owns the Units.

    In addition, please note that capital gains may be recharacterized as
ordinary income in the case of certain financial transactions that are
considered "conversion transactions" effective for transactions entered into
after April 30, 1993. Unitholders and prospective investors should consult with
their tax advisers regarding the potential effect of this provision on their
investment in Units. The 1997 Tax Act includes provisions that treat certain
transactions designed to reduce or eliminate risk of loss and opportunities for
gain (e.g. short sales, offsetting notional principal contracts, futures or
forward contracts or similar transactions) as constructive sales for purposes of
recognition of gain (but not loss) and for purposes of determining the holding
period.

   Distributions which are taxable as ordinary income to Unitholders will
constitute dividends for federal income tax purposes. When Units are held by
corporate Unitholders, Trust distributions may qualify for the 70% dividends
received deduction, subject to limitations otherwise applicable to the
availability of the deduction, to the extent the distribution is attributable to
dividends received by the Trust from United States corporations (other than Real
Estate Investment Trusts) and is designated by the Trust as being eligible for
such deduction. To the extent dividends received by the Trust are attributable
to foreign corporations, a corporation that owns Units will not be entitled to
the dividends received deduction with respect to its pro rata portion of such
dividends, since the dividends received deduction is generally available only
with respect to dividends paid by domestic corporations. The Trust will provide
each Unitholder with information annually concerning what part of the Trust
distributions are eligible for the dividends received deduction.

   The Trust may elect to pass through to the Unitholders the foreign income and
similar taxes paid by the Trust in order to enable such Unitholders to take a
credit (or deduction) for foreign income taxes paid by the Trust. If such an
election is made, Unitholders of the Trust, because they are deemed to own a pro
rata portion of the foreign securities held by the Trust, must include in their
gross income, for federal income tax purposes, both their portion of dividends
received by the Trust and also their portion of the amount which the Trust deems
to be the Unitholders' portion of foreign income taxes paid with respect to, or
withheld from, dividends, interest or other income of the Trust from its foreign
investments. Unitholders may then subtract from their federal income tax the
amount of such taxes withheld, or else treat such foreign taxes as deductions
from gross income; however, as in the case of investors receiving income
directly from foreign sources, the above described tax credit or deduction is
subject to certain limitations. The 1997 Tax Act imposes a required holding
period for such credits. Unitholders should consult their tax advisers regarding
this election and its consequences to them.

   Under the Code, certain miscellaneous itemized deductions, such as investment
expenses, tax return preparation fees and employee business expenses, will be
deductible by individuals only to the extent they exceed 2% of adjusted gross
income. Miscellaneous itemized deductions subject to this limitation under
present law do not include expenses incurred by the Trust so long as the Units
are held by or for 500 or more persons at all times during the taxable year or
another exception is met. In the event the Units are held by fewer than 500
persons, additional taxable income may be realized by the individual (and other
noncorporate) Unitholders in excess of the distributions received from the
Trust.

   Distributions reinvested into additional Units of the Trust will be taxed to
a Unitholder in the manner des cribed above (i.e., as ordinary income, long-term
capital gain or as a return of capital).

   The federal tax status of each year's distributions will be reported to
Unitholders and to the Internal Revenue Service. Each Unitholder will be
requested to provide the Unitholder's taxpayer identification number to the
Trustee and to certify that the Unitholder has not been notified that payments
to the Unitholder are subject to back-up withholding. If the proper taxpayer
identification number and appropriate certification are not provided when
requested, distributions by the Trust to such Unitholder (including amounts
received upon the redemption of Units) will be subject to back-up withholding.
   The foregoing discussion relates only to the federal income tax status of the
Trust and to the tax treatment of distributions by the Trust to United States
Unitholders.

   A Unitholder who is a foreign investor (i.e., an investor other than a United
States citizen or resident or a United States corporation, partnership, estate
or trust) should be aware that, generally, subject to applicable tax treaties,
distributions from the Trust which constitute dividends for Federal income tax
purposes (other than dividends which the Trust designates as capital gain
dividends) will be subject to United States income taxes, including withholding
taxes. However, distributions received by a foreign investor from the Trust that
are designated by the Trust as capital gain dividends should not be subject to
United States Federal income taxes, including withholding taxes, if all of the
following conditions are met (i) the capital gain dividend is not effectively
connected with the conduct by the foreign investor of a trade or business within
the United States, (ii) the foreign investor (if an individual) is not present
in the United States for 183 days or more during his or her taxable year, and
(iii) the foreign investor provides all certification which may be required of
his status (foreign investors may contact the Sponsor to obtain a Form W-8 which
must be filed with the Trustee and refiled every three calendar years
thereafter). Foreign investors should consult their tax advisers with respect to
United States tax consequences of ownership of Units. Units in the Trust and
Trust distributions may also be subject to state and local taxation and
Unitholders should consult their tax advisers in this regard.

   The Dow 30SM Index & Treasury Trust. The following is a general discussion of
certain of the federal income tax consequences of the purchase, ownership and
disposition of the Units of The Dow 30SM Index & Treasury Trust. The summary is
limited to investors who hold the Units as "capital assets" (generally, property
held for investment within the meaning of Section 1221 of the Internal Revenue
Code of 1986 (the "Code")). Unitholders should consult their tax advisers in
determining the federal, state, local and any other tax consequences of the
purchase, ownership and disposition of Units in the Trust. For purposes of the
following discussion and opinion, it is assumed that each stock in the Trust (an
"Equity Security") is equity for federal income tax purposes, that interest on
U.S. Treasury obligations in the Trust ("U.S. Treasury Obligations") is included
in gross income for Federal tax purposes and that each U.S. Treasury Obligation
is debt for Federal income tax purposes.

   In the opinion of Chapman and Cutler, special counsel for the Sponsor, under
existing law:

   1. The Trust is not an association taxable as a corporation for federal
income tax purposes; each Unitholder will be treated as the owner of a pro rata
portion of each of the assets of the Trust under the Code; and the income of the
Trust will be treated as income of the Unitholders thereof under the Code. Each
Unitholder will be considered to have received his pro rata share of income
derived from each Trust asset when such income is considered to be received by
the Trust.

   2. Each Unitholder will have a taxable event when the Trust disposes of a
Security (whether by sale, exchange, liquidation, redemption, or otherwise) or
upon the sale or redemption of Units by such Unitholder (except to the extent an
in kind distribution of stock is received by such Unitholder as described
below). The price a Unitholder pays for his Units, generally including sales
charges, is allocated among his pro rata portion of each Security held by the
Trust (in proportion to the fair market values thereof on the valuation date
nearest the date the Unitholder purchase his Units) in order to determine his
initial tax basis for his pro rata portion of each Security held by the Trust.
Unitholders should consult their own tax advisers with regard to calculation of
basis. The U.S. Treasury Obligations are treated as stripped bonds and may be
treated as bonds issued with original issue discount as of the date a Unitholder
purchases his Units. Because the U.S. Treasury Obligations represent interests
in stripped U.S. Treasury bonds, a Unitholder's tax basis in his pro rata share
of each U.S. Treasury Obligation held by the Trust (determined at the time he
acquires his Units, in the manner described above) shall be treated as its
"purchase price" by the Unitholder. Original issue discount is effectively
treated as interest for federal income tax purposes and the amount of original
issue discount in this case is generally the difference between the bond's
purchase price and its stated redemption price at maturity. A Unitholder will be
required to include in his gross income for each taxable year the sum of his
daily portions of original issue discount attributable to the U.S. Treasury
Obligations held by the Trust as such original issue discount accrues and will
in general be subject to federal income tax with respect to the total amount of
such original issue discount that accrues for such year even though the income
is not distributed to Unitholders during such year to the extent it is not less
than a "de minimis" amount as determined under Treasury Regulations relating to
stripped bonds. To the extent the amount of such original issue discount is less
than the respective "de minimis" amount, such discount is generally treated as
zero. In general, original issue discount accrues daily under a constant
interest rate method which takes into account the semi-annual compounding of
accrued interest. In the case of the U.S. Treasury Obligations, this method will
generally result in an increasing amount of income to the Unitholders each year.
Unitholders should consult their tax advisors regarding the federal income tax
consequences and accretion of original issue discount. For federal income tax
purposes, a Unitholder's pro rata portion of dividends as defined by Section 316
of the Code paid by a corporation with respect to an Equity Security held by the
Trust are taxable as ordinary income to the extent of such corporation's current
and accumulated "earnings and profits". A Unitholder's pro rata portion of
dividends paid on such Equity Security which exceeds such current and
accumulated earnings and profits will first reduce a Unitholder's tax basis in
such Equity Security, and to the extent that such dividends exceed a
Unitholder's tax basis in such Equity Security shall generally be treated as
capital gain. In general, the holding period for such capital gain will be
determined by the period of time a Unitholder has held his Units.

   3. A Unitholder's portion of gain, if any, upon the sale or redemption of
Units or the disposition of Securities held by the Trust will generally be
considered a capital gain, except in the case of a dealer or a financial
institution. A Unitholder's portion of loss, if any, upon the sale or redemption
of Units or the disposition of Securities held by the Trust will generally be
considered a capital loss (except in the case of a dealer or a financial
institution). Unitholders should consult their tax advisers regarding the
recognition of such capital gains and losses for federal income tax purposes.

   Dividends Received Deduction. A Unitholder will be considered to have
received all of the dividends paid on his pro rata portion of each Equity
Security when such dividends are received by the Trust. Unitholders will be
taxed in this manner regardless of whether distributions from the Trust are
actually received by the Unitholder or are automatically reinvested. A
corporation that owns Units will generally be entitled to a 70% dividends
received deduction with respect to such Unitholder's pro rata portion of
dividends received by the Trust (to the extent such dividends are taxable as
ordinary income, as discussed above, and are attributable to domestic
corporations) in the same manner as if such corporation directly owned the
Securities paying such dividends (other than corporate Unitholders, such as "S"
corporations, which are not eligible for the deduction because of their special
characteristics and other than for purposes of special taxes such as the
accumulated earnings tax and the personal holding corporation tax). However, a
corporation owning Units should be aware that Sections 246 and 246A of the Code
impose additional limitations on the eligibility of dividends for the 70%
dividends received deduction. These limitations include a requirement that stock
(and therefore Units) must generally be held at least 46 days (as determined
under Section 246(c) of the Code). Final regulations have been issued which
address special rules that must be considered in determining whether the 46 day
holding requirement is met. Moreover, the allowable percentage of the deduction
will be reduced from 70% if a corporate Unitholder owns certain stock (or Units)
the financing of which is directly attributable to indebtedness incurred by such
corporation. To the extent dividends received by the Trust are attributable to
foreign corporations, a corporation that owns Units will not be entitled to the
dividends received deduction with respect to its pro rata portion of such
dividends, since the dividends received deduction is generally available only
with respect to dividends paid by domestic corporations. It should be noted that
various legislative proposals that would affect the dividends received deduction
have been introduced. Unitholders should consult with their tax advisers with
respect to the limitations on and possible modifications to the dividends
received deduction.

   Limitations on Deductibility of Trust Expenses by Unitholders. Each
Unitholder's pro rata share of each expense paid by the Trust is deductible by
the Unitholder to the same extent as though the expense had been paid directly
by him. It should be noted that as a result of the Tax Reform Act of 1986,
certain miscellaneous itemized deductions, such as investment expenses, tax
return preparation fees and employee business expenses will be deductible by an
individual only to the extent they exceed 2% of such individual's adjusted gross
income. Unitholders may be required to treat some or all of the expenses of the
Trust as miscellaneous itemized deductions subject to this limitation.
Unitholders should consult with their own tax advisers regarding the
deductibility of Trust expenses.

   Recognition of Taxable Gain or Loss Upon Disposition of Securities by the
Trust or Disposition of Units. As discussed above, a Unitholder may recognize
taxable gain (or loss) when an Security is disposed of by the Trust or if the
Unitholder disposes of a Unit. The Internal Revenue Service Restructing and
Reform Act of 1998 (the "1998 Tax Act") provides that for taxpayers other than
corporations, net capital gain (which is defined as net long-term capital gain
over net short-term capital loss for the taxable year) realized from property
(with certain exclusions) is subject to a maximum marginal stated tax rate of
20% (10% in the case of certain taxpayers in the lowest tax bracket). Capital
gain or loss is long-term if the holding period for the asset is more than one
year, and is short-term if the holding period for the asset is one year or less.
The date on which a Unit is acquired (i.e., the "trade date") is excluded for
purposed for determining the holding period of the Unit. Capital gains realized
from assets held for one year or less are taxed at the same rates as ordinary
income.

   In addition, please note that capital gains may be recharacterized as
ordinary income in the case of certain financial transactions that are
considered "conversion transactions" effective for transactions entered into
after April 30, 1993. Unitholders and prospective investors should consult with
their tax advisers regarding the potential effect of this provision on their
investment in Units.

   If a Unitholder disposes of a Unit he is deemed thereby to have disposed of
his entire pro rata interest in all assets of the Trust including his pro rata
portion of all Securities represented by a Unit.

   The Taxpayer Relief Act of 1997 (the "1997 Tax Act") includes provisions that
treat certain transactions designed to reduce or eliminate risk of loss and
opportunities for gain (e.g., short sales, offsetting notional principal
contracts, futures or forward contracts or similar transactions) as constructive
sales for purposes of recognition of gain (but not of loss) and for purposes of
determining the holding period. Unitholders should consult their own tax
advisers with regard to any such constructive sales rules.

   Special Tax Consequences of In Kind Distributions Upon Redemption of Units or
Termination of the Trust. As discussed in "Rights of Unitholders--Redemption of
Units", under certain circumstances a Unitholder tendering Units for redemption
may request an in kind distribution. A Unitholder may also under certain
circumstances request an in kind distribution upon the termination of the Trust.
See "Rights of Unitholders--Redemption of Units." U.S. Treasury Obligations will
not be distributed to a Unitholder as part of an in kind distribution.
Unitholders will receive cash representing their portion of any U.S. Treasury
Obligations. As previously discussed, prior to the redemption of Units or the
termination of the Trust, a Unitholder is considered as owning a pro rata
portion of each of the Trust's assets for federal income tax purposes. The
receipt of an in kind distribution will result in a Unitholder receiving an
undivided interest in whole shares of stock plus, possibly, cash.

   The potential tax consequences that may occur under an in kind distribution
with respect to each Equity Security held by the Trust will depend on whether or
not a Unitholder receives cash in addition to Equity Securities. An "Equity
Security" for this purpose is a particular class of stock issued by a particular
corporation. A Unitholder will not recognize gain or loss if a Unitholder only
receives Equity Securities in exchange for his or her pro rata portion in the
Equity Securities held by the Trust. However, if a Unitholder also receives cash
in exchange for a fractional share of such Equity Security held by the Trust,
such Unitholder will generally recognize gain or loss based upon the difference
between the amount of cash received by the Unitholder and his tax basis in such
fractional share of an Equity Security held by the Trust.

   Because the Trust will own many Equity Securities, a Unitholder who requests
an in kind distribution will have to analyze the tax consequences with respect
to each Equity Security owned by the Trust. The amount of taxable gain (or loss)
recognized upon such exchange will generally equal the sum of the gain (or loss)
recognized under the rules described above by such Unitholder with respect to
each Equity Security owned by the Trust. Unitholders who request an in kind
distribution are advised to consult their tax advisers in this regard.

   Computation of the Unitholder's Tax Basis. Initially, a Unitholder's tax
basis in his Units will generally equal the price paid by such Unitholder of his
Units. The cost of the Units is allocated among the Securities held in the Trust
in accordance with the proportion of the fair market values of such Securities
on the valuation date nearest the date the Units are purchased in order to
determine such Unitholder's tax basis for his pro rata portion of each Security.

   A Unitholder's tax basis in his Units and his pro rata portion of an Equity
Security held by the Trust will be reduced to the extent dividends paid with
respect to such Security are received by the Trust which are not taxable as
ordinary income as described above.

   General. Each Unitholder will be requested to provide the Unitholder's
taxpayer identification number to the Trustee and to certify that the Unitholder
has not been notified that payments to the Unitholder are subject to back-up
withholding. If the proper taxpayer identification number and appropriate
certification are not provided when requested, distributions by the Trust to
such Unitholder (including amounts received upon the redemption of Units) will
be subject to back-up withholding. Distributions by the Trust (other than those
that are not treated as United States source income, if any) will generally be
subject to United States income taxation and withholding in the case of Units
held by non-resident alien individuals, foreign corporations or other non-United
States persons. Such persons should consult their tax advisers.

   In general, income that is not effectively connected to the conduct of a
trade or business within the United States that is earned by non-U.S.
Unitholders and derived from dividends of foreign corporations will not be
subject to U.S. withholding tax provided that less than 25 percent of the gross
income of the foreign corporations for a three-year period ending with the close
of its taxable year preceding payment was not effectively connected to the
conduct of a trade or business within the United States. In addition, such
earnings may be exempt from U.S. withholding pursuant to a specific treaty
between the United States and a foreign country. Non-U.S. Unitholders should
consult their own tax advisers regarding the imposition of U.S. withholding on
distributions from the Trust.

   It should be noted that payments to the Trust of dividends on Equity
Securities that are attributable to foreign corporations may be subject to
foreign withholding taxes and Unitholders should consult their tax advisers
regarding the potential tax consequences relating to the payment of any such
withholding taxes by the Trust. Any dividends withheld as a result thereof will
nevertheless be treated as income to the Unitholders. Because, under the grantor
trust rules, an investor is deemed to have paid directly his share of foreign
taxes that have been paid or accrued, if any, an investor may be entitled to a
foreign tax credit or deduction for United States tax purposes with respect to
such taxes. The 1997 Tax Act imposes a required holding period for such credits.
Investors should consult their tax advisers with respect to foreign withholding
taxes and foreign tax credits.

   At the termination of the Trust, the Trustee will furnish to each Unitholder
of the Trust a statement containing information relating to the dividends
received by the Trust on the Equity Securities, the gross proceeds received by
the Trust from the disposition of any Security (resulting from redemption or the
sale of any Security), and the fees and expenses paid by the Trust. The Trustee
will also furnish annual information returns to Unitholders and to the Internal
Revenue Service.

   In the opinion of special counsel to the Trust for New York tax matters, the
Trust is not an association taxable as a corporation and the income of the Trust
will be treated as the income of the Unitholders under the existing income tax
laws of the State and City of New York.

   The foregoing discussion relates only to the tax treatment of U.S.
Unitholders ("U.S. Unitholders") with regard to federal and certain aspects of
New York State and City income taxes. Unitholders may be subject to taxation in
New York or in other jurisdictions and should consult their own tax advisers in
this regard. As used herein, the term "U.S. Unitholder" means an owner of a Unit
of the Trust that (a) is (i) for United States federal income tax purposes a
citizen or resident of the United States, (ii) a corporation, partnership or
other entity created or organized in or under the laws of the United States or
of any political subdivision thereof, or (iii) an estate or trust the income of
which is subject to United States federal income taxation regardless of its
source or (b) does not qualify as a U.S. Unitholder in paragraph (a) but whose
income from a Unit is effectively connected with such Unitholder's conduct of a
United States trade or business. The term also includes certain former citizens
of the United States whose income and gain on the Units will be taxable.
Unitholders should consult their tax advisers regarding potential foreign, state
or local taxation with respect to the Units.

TRUST OPERATING EXPENSES
- --------------------------------------------------------------------------------

   Compensation of Sponsor, Supervisor and Evaluator. The Sponsor will not
receive any fees in connection with its activities relating to the Trusts.
However, the Supervisor and Evaluator, which are affiliates of the Sponsor, will
receive the annual fee for portfolio supervisory and evaluation services set
forth in the "Fee Table". These fees may exceed the actual costs of providing
these services to the Trusts but at no time will the total amount received for
supervisory and evaluation services rendered to all Van Kampen unit investment
trusts in any calendar year exceed the aggregate cost of providing these
services in that year.

   Trustee's Fee. For its services the Trustee will receive the fee from each
Trust set forth in the "Fee Table" (which includes the estimated amount of
miscellaneous Trust expenses). The Trustee benefits to the extent there are
funds in the Capital and Income Accounts since these Accounts are non-interest
bearing to Unitholders and the amounts earned by the Trustee are retained by the
Trustee. Part of the Trustee's compensation for its services to each Trust is
expected to result from the use of these funds.

   Miscellaneous Expenses. The following additional charges are or may be
incurred by a Trust: (a) normal expenses (including the cost of mailing reports
to Unitholders) incurred in connection with the operation of such Trust, (b)
fees of the Trustee for extraordinary services, (c) expenses of the Trustee
(including legal and auditing expenses) and of counsel designated by the
Sponsor, (d) various governmental charges, (e) expenses and costs of any action
taken by the Trustee to protect a Trust and the rights and interests of
Unitholders, (f) indemnification of the Trustee for any loss, liability or
expenses incurred in the administration of a Trust without negligence, bad faith
or wilful misconduct on its part, (g) foreign custodial and transaction fees,
(h) costs associated with liquidating the securities held in a Trust portfolio
and (i) expenditures incurred in contacting Unitholders upon termination of a
Trust. The Trusts will also pay a license fee to Dow Jones & Company, Inc. for
use of certain service marks.

   General. During the initial offering period, all of the fees and expenses of
a Trust will accrue on a daily basis and will be charged to the Trust at the end
of the initial offering period. After the initial offering period, all of the
fees and expenses of a Trust will accrue on a daily basis and will be charged to
the Trust on a monthly basis.

    The fees and expenses are generally paid out of the Capital Account of the
related Trust. When these amounts are paid by or owing to the Trustee, they are
secured by a lien on the related Trust's portfolio. It is expected that
Securities will be sold to pay these amounts which will result in capital gains
or losses to Unitholders. See "Taxation". The Trustee may not sell U.S. Treasury
obligations in The Dow 30SM Index & Treasury Trust to pay expenses unless the
maturity value of the U.S. Treasury obligations remaining in the portfolio after
the sale equals at least $11 per Unit. The Supervisor's, Evaluator's and
Trustee's fees may be increased without approval of the Unitholders by amounts
not exceeding proportionate increases under the category "All Services Less Rent
of Shelter" in the Consumer Price Index or, if this category is not published,
in a comparable category.

OTHER MATTERS
- --------------------------------------------------------------------------------

   Legal Opinions. The legality of the Units offered hereby has been passed upon
by Chapman and Cutler, 111 West Monroe Street, Chicago, Illinois 60603, as
counsel for the Sponsor. Winston & Strawn has acted as counsel to the Trustee
and as special counsel for New York tax matters.

   Independent Certified Public Accountants. The statements of condition and the
related portfolios included in this Prospectus have been audited by Grant
Thornton LLP, independent certified public accountants, as set forth in their
report in this Prospectus, and are included herein in reliance upon the
authority of said firm as experts in accounting and auditing.

ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------

   This Prospectus does not contain all the information set forth in the
Registration Statement filed by the Trusts with the SEC. The Information
Supplement, which has been filed with the SEC, includes more detailed
information concerning the Securities, investment risks and general information
about the Trusts. The Information Supplement may be obtained by contacting the
Trustee at (800) 856-8487 or is available along with other related materials at
the SEC's internet site (http://www.sec.gov).

TABLE OF CONTENTS
- --------------------------------------------------------------------------------
Title                                                                      Page
- -----                                                                      ----
Summary of Essential Financial Information...............................     2
Fee Table................................................................     3
The Dow 30SM Index Trust.................................................     4
The Dow 30SM Index & Treasury Trust......................................     6
Notes to Portfolios......................................................     8
The Securities...........................................................     9
Report of Independent Certified Public Accountants.......................    18
Statements of Condition .................................................    19
The Trusts...............................................................   A-1
Objectives and Securities Selection......................................   A-1
Risk Factors.............................................................   A-2
Public Offering..........................................................   A-3
Rights of Unitholders....................................................   A-7
Trust Administration.....................................................   A-9
Taxation.................................................................  A-11
Trust Operating Expenses.................................................  A-17
Other Matters............................................................  A-18
Additional Information...................................................  A-18

                                   PROSPECTUS

   
- --------------------------------------------------------------------------------
                                 January 5, 1999
    

                           Van Kampen Focus Portfolios

   
                  The Dow 30SM Index Trust, Series 6
                  The Dow 30SM Index & Treasury Trust, Series 8
    

                              Van Kampen Funds Inc.

                               One Parkview Plaza
                        Oakbrook Terrace, Illinois 60181

                             2800 Post Oak Boulevard
                              Houston, Texas 77056

               Please retain this prospectus for future reference.

   
                                   Van Kampen
                             Information Supplement
                     Van Kampen Focus Portfolios, Series 124
    

- --------------------------------------------------------------------------------
     This Information Supplement provides additional information concerning the
risks and operations of the Trust which is not described in the Prospectus. This
Information Supplement should be read in conjunction with the Prospectus. This
Information Supplement is not a prospectus, does not include all of the
information that an investor should consider before investing in a Trust and may
not be used to offer or sell Units without the Prospectus. Copies of the
Prospectus can be obtained by contacting the Sponsor at One Parkview Plaza,
Oakbrook Terrace, Illinois 60181 or by contacting your broker. This Information
Supplement is dated as of the date of the Prospectus and all capitalized terms
have been defined in the Prospectus.

                                Table of Contents

                                                                 Page
      Risk Factors                                                 2
      The Trusts                                                   2
      Sponsor Information                                          3
      Trustee Information                                          4
      Trust Termination                                            4

RISK FACTORS

     Price Volatility. Because the Trusts invest in stocks of U.S. and foreign
companies, you should understand the risks of investing in common stocks before
purchasing Units. These risks include the risk that the financial condition of
the company or the general condition of the stock market may worsen and the
value of the stocks (and therefore Units) will fall. Stocks are especially
susceptible to general stock market movements. The value of stocks often rises
or falls rapidly and unpredictably as market confidence and perceptions of
companies change. These perceptions are based on factors including expectations
regarding government economic policies, inflation, interest rates, economic
expansion or contraction, political climates and economic or banking crises. The
value of Units will fluctuate with the value of the stocks in a Trust and may be
more or less than the price you originally paid for your Units. As with any
investment, we cannot guarantee that the performance of a Trust will be positive
over any period of time. Because the Trusts are unmanaged, the Trustee will not
sell stocks in response to market fluctuations as is common in managed
investments. In addition, because some Trusts hold a relatively small number of
stocks, you may encounter greater market risk than in a more diversified
investment.

     Dividends. Stocks represent ownership interests in a company and are not
obligations of the company. Common stockholders have a right to receive payments
from the company that is subordinate to the rights of creditors, bondholders or
preferred stockholders of the company. This means that common stockholders have
a right to receive dividends only if a company's board of directors declares a
dividend and the company has provided for payment of all of its creditors,
bondholders and preferred stockholders. If a company issues additional debt
securities or preferred stock, the owners of these securities will have a claim
against the company's assets before common stockholders if the company declares
bankruptcy or liquidates its assets even though the common stock was issued
first. As a result, the company may be less willing or able to declare or pay
dividends on its common stock.

     Liquidity. Whether or not the stocks in a Trust are listed on a stock
exchange, the stocks may delist from the exchange or principally trade in an
over-the-counter market. As a result, the existence of a liquid trading market
could depend on whether dealers will make a market in the stocks. We cannot
guarantee that dealers will maintain a market or that any market will be liquid.
The value of the stocks could fall if trading markets are limited or absent.

     Additional Units. The Sponsor may create additional Units of a Trust by
depositing into the Trust additional stocks or cash with instructions to
purchase additional stocks. A cash deposit could result in a dilution of your
investment and anticipated income because of fluctuations in the price of the
stocks between the time of the deposit and the purchase of the stocks and
because the Trust will pay brokerage fees.

     Voting. Only the Trustee may sell or vote the stocks in a Trust. While you
may sell or redeem your Units, you may not sell or vote the stocks in your
Trust. The Sponsor will instruct the Trustee how to vote the stocks. The Trustee
will vote the stocks in the same general proportion as shares held by other
shareholders if the Sponsor fails to provide instructions.

     Year 2000. The Trusts could be negatively impacted if computer systems used
by the Sponsor, Evaluator, Supervisor or Trustee or other service providers to
the Trusts do not properly process date-related information after January 1,
2000. This is commonly known as the "Year 2000 Problem". The Sponsor, Evaluator,
Supervisor and Trustee are taking steps to address this problem and to obtain
reasonable assurances that other service providers to the Trusts are taking
comparable steps. We cannot guarantee that these steps will be sufficient to
avoid any adverse impact on the Trusts. This problem is expected to impact
corporations to varying degrees based on factors such as industry sector and
degree of technological sophistication. We cannot predict what impact, if any,
this problem will have on the issuers of stocks in the Trusts.

THE TRUSTS

    In seeking the Trusts' objectives, the Sponsor considered the ability of the
Securities to outpace inflation. While inflation is currently relatively low,
the United States has historically experienced periods of double-digit
inflation. While the prices of securities will fluctuate, over time securities
have outperformed the rate of inflation, and other less risky investments, such
as government bonds and U.S. Treasury bills. Past performance is, however, no
guarantee of future results.

    Investors should note that the selection criteria were applied to the
Securities for inclusion in the Trusts as of the Initial Date of Deposit. Should
a Security no longer meet the criteria used for selection for a Trust, such
Security will not as a result thereof be removed from a Trust portfolio.

    Stocks have been acknowledged as one of the best ways to stay ahead of
inflation over time. For example, common stocks (as represented by the Standard
& Poor's 500 Index) have generally outperformed long-term U.S. Government bonds,
U.S. Treasury bills and the rate of inflation over the long-term. Of course,
this represents past performance of these categories and there is no guarantee
of future results, either of these categories or of the Trust. In addition, the
certain Trusts seek to provide access to international markets which have often
generated historical returns superior to those in the United States. For
example, during 1993-1997, the United States stock market ranked among the top
three developed markets in total return only once and never ranked first
(measured by the Morgan Stanley Capital International USA Index and MSCI country
indexes).

SPONSOR INFORMATION

    Van Kampen Funds Inc., a Delaware corporation, is the Sponsor of the Trust.
The Sponsor is an indirect subsidiary of Van Kampen Investments Inc. Van Kampen
Investments Inc. is a wholly owned subsidiary of MSAM Holdings II, Inc., which
in turn is a wholly owned subsidiary of Morgan Stanley Dean Witter & Co.
("MSDW").

    MSDW, together with various of its directly and indirectly owned
subsidiaries, is engaged in a wide range of financial services through three
primary businesses: securities, asset management and credit services. These
principal businesses include securities underwriting, distribution and trading;
merger, acquisition, restructuring and other corporate finance advisory
activities; merchant banking; stock brokerage and research services; asset
management; trading of futures, options, foreign exchange commodities and swaps
(involving foreign exchange, commodities, indices and interest rates); real
estate advice, financing and investing; global custody, securities clearance
services and securities lending; and credit card services.

    Van Kampen Funds Inc. specializes in the underwriting and distribution of
unit investment trusts and mutual funds with roots in money management dating
back to 1926. The Sponsor is a member of the National Association of Securities
Dealers, Inc. and has offices at One Parkview Plaza, Oakbrook Terrace, Illinois
60181, (630) 684-6000 and 2800 Post Oak Boulevard, Houston, Texas 77056, (713)
993-0500. As of November 30, 1997, the total stockholders' equity of Van Kampen
Funds Inc. was $132,381,000 (audited). (This paragraph relates only to the
Sponsor and not to the Trust or to any other Series thereof. The information is
included herein only for the purpose of informing investors as to the financial
responsibility of the Sponsor and its ability to carry out its contractual
obligations. More detailed financial information will be made available by the
Sponsor upon request.)

    As of September 30, 1997, the Sponsor and its Van Kampen affiliates managed
or supervised approximately $65.3 billion of investment products, of which over
$10.85 billion is invested in municipal securities. The Sponsor and its Van
Kampen affiliates managed $54 billion of assets, consisting of $34.3 billion for
55 open-end mutual funds (of which 45 are distributed by Van Kampen Funds Inc.)
$14.2 billion for 37 closed-end funds and $5.5 billion for 106 institutional
accounts. The Sponsor has also deposited approximately $26 billion of unit
investment trusts. All of Van Kampen's open-end funds, closed-ended funds and
unit investment trusts are professionally distributed by leading financial firms
nationwide. Based on cumulative assets deposited, the Sponsor believes that it
is the largest sponsor of insured municipal unit investment trusts, primarily
through the success of its Insured Municipals Income Trust(R) or the IM-IT(R)
trust. The Sponsor also provides surveillance and evaluation services at cost
for approximately $13 billion of unit investment trust assets outstanding. Since
1976, the Sponsor has serviced over two million investor accounts, opened
through retail distribution firms.

    If the Sponsor shall fail to perform any of its duties under the Trust
Agreement or become incapable of acting or shall become bankrupt or its affairs
are taken over by public authorities, then the Trustee may (i) appoint a
successor Sponsor at rates of compensation deemed by the Trustee to be
reasonable and not exceeding amounts prescribed by the Securities and Exchange
Commission, (ii) terminate the Trust Agreement and liquidate the Trusts as
provided therein or (iii) continue to act as Trustee without terminating the
Trust Agreement.

TRUSTEE INFORMATION

    The Trustee is The Bank of New York, a trust company organized under the
laws of New York. The Bank of New York has its unit investment trust division
offices at 101 Barclay Street, New York, New York 10286 (800) 221-7668. The Bank
of New York is subject to supervision and examination by the Superintendent of
Banks of the State of New York and the Board of Governors of the Federal Reserve
System, and its deposits are insured by the Federal Deposit Insurance
Corporation to the extent permitted by law.

    The duties of the Trustee are primarily ministerial in nature. It did not
participate in the selection of Securities for the Trust portfolios.

    In accordance with the Trust Agreement, the Trustee shall keep proper books
of record and account of all transactions at its office for each Trust. Such
records shall include the name and address of, and the number of Units of each
Trust held by, every Unitholder. Such books and records shall be open to
inspection by any Unitholder at all reasonable times during the usual business
hours. The Trustee shall make such annual or other reports as may from time to
time be required under any applicable state or federal statute, rule or
regulation. The Trustee is required to keep a certified copy or duplicate
original of the Trust Agreement on file in its office available for inspection
at all reasonable times during the usual business hours by any Unitholder,
together with a current list of the Securities held in each Trust.

    Under the Trust Agreement, the Trustee or any successor trustee may resign
and be discharged of its responsibilities created by the Trust Agreement by
executing an instrument in writing and filing the same with the Sponsor. The
Trustee or successor trustee must mail a copy of the notice of resignation to
all Unitholders then of record, not less than 60 days before the date specified
in such notice when such resignation is to take effect. The Sponsor upon
receiving notice of such resignation is obligated to appoint a successor trustee
promptly. If, upon such resignation, no successor trustee has been appointed and
has accepted the appointment within 30 days after notification, the retiring
Trustee may apply to a court of competent jurisdiction for the appointment of a
successor. The Sponsor may remove the Trustee and appoint a successor trustee as
provided in the Trust Agreement at any time with or without cause. Notice of
such removal and appointment shall be mailed to each Unitholder by the Sponsor.
Upon execution of a written acceptance of such appointment by such successor
trustee, all the rights, powers, duties and obligations of the original trustee
shall vest in the successor. The resignation or removal of a Trustee becomes
effective only when the successor trustee accepts its appointment as such or
when a court of competent jurisdiction appoints a successor trustee.

    Any corporation into which a Trustee may be merged or with which it may be
consolidated, or any corporation resulting from any merger or consolidation to
which a Trustee shall be a party, shall be the successor trustee. The Trustee
must be a banking corporation organized under the laws of the United States or
any state and having at all times an aggregate capital, surplus and undivided
profits of not less than $5,000,000.

TRUST TERMINATION

    A Trust may be liquidated at any time by consent of Unitholders representing
66 2/3% of the Units of such Trust then outstanding or by the Trustee when the
value of the Securities owned by a Trust, as shown by any evaluation, is less
than $500,000 ($3,000,000 if the value of the Trust has exceeded $15,000,000). A
Trust will be liquidated by the Trustee in the event that a sufficient number of
Units of such Trust not yet sold are tendered for redemption by the Sponsor, so
that the net worth of such Trust would be reduced to less than 40% of the value
of the Securities at the time they were deposited in such Trust. If a Trust is
liquidated because of the redemption of unsold Units by the Sponsor, the Sponsor
will refund to each purchaser of Units the entire sales charge paid by such
purchaser. The Trust Agreement will terminate upon the sale or other disposition
of the last Security held thereunder, but in no event will it continue beyond
the Mandatory Termination Date.

    Commencing during the period beginning nine business days prior to, and no
later than, the Mandatory Termination Date, Securities will begin to be sold in
connection with the termination of the Trusts. The Sponsor will determine the
manner, timing and execution of the sales of the Securities. The Sponsor shall
direct the liquidation of the Securities in such manner as to effectuate orderly
sales and a minimal market impact. In the event the Sponsor does not so direct,
the Securities shall be sold within a reasonable period and in such manner as
the Trustee, in its sole discretion, shall determine. At least 30 days before
the Mandatory Termination Date the Trustee will provide written notice of any
termination to all Unitholders of the appropriate Trust and in the case of a
Trust will include with such notice a form to enable Unitholders owning 1,000 or
more Units to request an in kind distribution of the U.S.-traded Securities. To
be effective, this request must be returned to the Trustee at least five
business days prior to the Mandatory Termination Date. On the Mandatory
Termination Date (or on the next business day thereafter if a holiday) the
Trustee will deliver each requesting Unitholder's pro rata number of whole
shares of the U.S.-traded Securities in a Trust to the account of the
broker-dealer or bank designated by the Unitholder at Depository Trust Company.
The value of the Unitholder's fractional shares of the Securities will be paid
in cash. Unitholders with less than 1,000 Units, Unitholders in a Trust with
1,000 or more Units not requesting an in kind distribution will receive a cash
distribution from the sale of the remaining Securities within a reasonable time
following the Mandatory Termination Date. Regardless of the distribution
involved, the Trustee will deduct from the funds of the appropriate Trust any
accrued costs, expenses, advances or indemnities provided by the Trust
Agreement, including estimated compensation of the Trustee, costs of liquidation
and any amounts required as a reserve to provide for payment of any applicable
taxes or other governmental charges. Any sale of Securities in a Trust upon
termination may result in a lower amount than might otherwise be realized if
such sale were not required at such time. The Trustee will then distribute to
each Unitholder of each Trust his pro rata share of the balance of the Income
and Capital Accounts of such Trust.

    Within 60 days of the final distribution Unitholders will be furnished a
final distribution statement of the amount distributable. At such time as the
Trustee in its sole discretion will determine that any amounts held in reserve
are no longer necessary, it will make distribution thereof to Unitholders in the
same manner.

                                       S-2
                       CONTENTS OF REGISTRATION STATEMENT

         This Amendment of Registration Statement comprises the following papers
and documents:

     The facing sheet
     The Prospectus
     The signatures
     The consents of independent public accountants and legal counsel

The following exhibits:

1.1  Copy of Trust Agreement.

3.1  Opinion and consent of counsel as to legality of securities being
     registered.

3.2  Opinion of Counsel as to the Federal Income tax status of securities
     being registered.

3.3  Opinion and consent of counsel as to New York tax status of securites
     being registered.

4.1  Consent of Interactive Data Corporation.

4.2  Consent of Independent Certified Public Acountants.

                                   SIGNATURES

         The Registrant, Van Kampen Focus Portfolios, Series 124, hereby
identifies Van Kampen Merritt Equity Opportunity Trust, Series 1, Series 2,
Series 4 and Series 7 and Van Kampen American Capital Equity Opportunity Trust,
Series 13, Series 14, Series 57 and Series 89 for purposes of the
representations required by Rule 487 and represents the following: (1) that the
portfolio securities deposited in the series as to the securities of which this
Registration Statement is being filed do not differ materially in type or
quality from those deposited in such previous series; (2) that, except to the
extent necessary to identify the specific portfolio securities deposited in, and
to provide essential financial information for, the series with respect to the
securities of which this Registration Statement is being filed, this
Registration Statement does not contain disclosures that differ in any material
respect from those contained in the registration statements for such previous
series as to which the effective date was determined by the Commission or the
staff; and (3) that it has complied with Rule 460 under the Securities Act of
1933.

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant, Van Kampen Focus Portfolios, Series 124 has duly caused this
Amendment to the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Chicago and State of
Illinois on the 5th day of January, 1999.

                                   Van Kampen Focus Portfolios, Series 124

                                   By Van Kampen Funds Inc.

                                   By Gina M. Costello
                                   Assistant Secretary

         Pursuant to the requirements of the Securities Act of 1933, this
Amendment to the Registration Statement has been signed below on January 5, 1999
by the following persons who constitute a majority of the Board of Directors of
Van Kampen Funds Inc.

SIGNATURE                TITLE

Don G. Powell            Chairman and Chief Executive  )
                         Officer                       )

John H. Zimmerman        President and Chief Operating )
                         Officer                       )

Ronald A. Nyberg         Executive Vice President and  )
                         General Counsel               )

William R. Rybak         Executive Vice President and  )
                         Chief Financial Officer       )

Gina M. Costello         (Attorney-in-fact*)

- --------------------------------------------------------------------------------
         *An executed copy of each of the related powers of attorney is filed
herewith or was filed with the Securities and Exchange Commission in connection
with the Registration Statement on Form S-6 of Van Kampen American Capital
Equity Opportunity Trust, Series 64 (File No. 333-33087) and Van Kampen American
Capital Equity Opportunity Trust, Series 87 (File No. 333-44581) and the same
are hereby incorporated herein by this reference.

                                                                     EXHIBIT 1.1

                           VAN KAMPEN FOCUS PORTFOLIOS
                                   SERIES 124
                                 TRUST AGREEMENT

                                                         Dated:  January 5, 1999

         This Trust Agreement among Van Kampen Funds Inc., as Depositor,
American Portfolio Evaluation Services, a division of Van Kampen Investment
Advisory Corp., as Evaluator, Van Kampen Investment Advisory Corp., as
Supervisory Servicer, and The Bank of New York, as Trustee, sets forth certain
provisions in full and incorporates other provisions by reference to the
document entitled "Van Kampen American Capital Equity Opportunity Trust, Series
87 and Subsequent Series, Standard Terms and Conditions of Trust, Effective
January 27, 1998" (herein called the "Standard Terms and Conditions of Trust")
and such provisions as are set forth in full and such provisions as are
incorporated by reference constitute a single instrument. All references herein
to Articles and Sections are to Articles and Sections of the Standard Terms and
Conditions of Trust.

                                WITNESSETH THAT:

         In consideration of the premises and of the mutual agreements herein
contained, the Depositor, Evaluator, Supervisory Servicer and Trustee agree as
follows:

                                     PART I
                     STANDARD TERMS AND CONDITIONS OF TRUST

         Subject to the provisions of Part II hereof, all the provisions
contained in the Standard Terms and Conditions of Trust are herein incorporated
by reference in their entirety and shall be deemed to be a part of this
instrument as fully and to the same extent as though said provisions had been
set forth in full in this instrument.

                                     PART II
                      SPECIAL TERMS AND CONDITIONS OF TRUST

         The following special terms and conditions are hereby agreed to:

          1. The Securities defined in Section 1.01(24), listed in the Schedule
hereto, have been deposited in trust under this Trust Agreement.

          2. The fractional undivided interest in and ownership of each Trust
represented by each Unit is an amount the numerator of which is one and the
denominator of which is the amount set forth under "Summary of Essential
Financial Information - Initial Number of Units" in the Prospectus. Such
fractional undivided interest may be (a) increased by the number of any
additional Units issued pursuant to Section 2.03, (b) increased or decreased in
connection with an adjustment to the number of Units pursuant to Section 2.03,
or (c) decreased by the number of Units redeemed pursuant to Section 5.02.

          3. The terms "Capital Account Record Date" and "Income Account Record
Date" shall mean the "Record Dates" set forth under "Summary of Essential
Financial Information" in the Prospectus.

          4. The terms "Capital Account Distribution Date" and "Income Account
Distribution Date" shall mean the "Distribution Dates" set forth under "Summary
of Essential Financial Information" in the Prospectus.

          5. The term "Mandatory Termination Date" shall mean the "Mandatory
Termination Date" set forth under "Summary of Essential Financial Information"
in the Prospectus.

          6. Section 6.01(e) is hereby replace with the following:

               (e) (1) Subject to the provisions of subparagraph (2) of this
         paragraph, the Trustee may employ agents, sub-custodians, attorneys,
         accountants and auditors and shall not be answerable for the default or
         misconduct of any such agents, sub-custodians, attorneys, accountants
         or auditors if such agents, sub-custodians, attorneys, accountants or
         auditors shall have been selected with reasonable care. The Trustee
         shall be fully protected in respect of any action under this Indenture
         taken or suffered in good faith by the Trustee in accordance with the
         opinion of counsel, which may be counsel to the Depositor acceptable to
         the Trustee, provided, however that this disclaimer of liability shall
         not excuse the Trustee from the responsibilities specified in
         subparagraph (2) below. The fees and expenses charged by such agents,
         sub-custodians, attorneys, accountants or auditors shall constitute an
         expense of the Trust reimbursable from the Income and Capital Accounts
         of the affected Trust as set forth in section 6.04 hereof.

                   (2) The Trustee may place and maintain in the care of an
         Eligible Foreign Custodian (which is employed by the Trustee as a
         sub-custodian as contemplated by subparagraph (1) of the paragraph (e)
         and which may be an affiliate or subsidiary of the Trustee or any other
         entity in which the Trustee may have an ownership interest) any
         investment (including foreign currencies) for which the primary market
         is outside the United States, and such case and cash equivalents in
         amounts reasonably necessary to effect the Trust's transactions in such
         investments, provided that:

                   (a) The Trustee shall perform all duties assigned to the
         Foreign Custody Manager by Rule 17f-5 under the Investment Company Act
         of 1940 (17 CFR ss. 270,17f-5) ("Rule 17f-5"), as now in effect or as
         such rule may be amended in the future. The Trustee shall not delegate
         such duties.

                   (b) The Trustee shall exercise reasonable care, prudence and
         diligence such as a person having responsibility for the safekeeping of
         Trust assets would exercise, and shall be liable to the Trust for any
         loss occurring as a result of its failure to do so.

                   (c) The Trustee shall indemnify the Trust and hold the Trust
         harmless from and against any risk of loss of Trust assets held in
         accordance with the foreign custody contract.

                   (d) The Trustee shall maintain and keep current written
         records regarding the basis for the choice or continued use of a
         particular Eligible Foreign Custodian pursuant to this subparagraph for
         a period of not less than six years from the end of the fiscal year in
         which the Trust was terminated, the first two years in an easily
         accessible place. Such records shall be available for inspection by
         Unitholders and the Securities and Exchange Commission at the Trustee's
         offices at all reasonable times during it usual business hours.

                   (3) "Eligible Foreign Custodian" shall have the meaning
         assigned to it in Rule 17f-5.

                   (4) "Foreign Custody Manager" shall have the meaning assigned
         to it in Rule 17f-5.

          7.    Section 1.01 (21) shall be replaced in its entirety by the 
following:

                   (21) "Percentage Ratio" shall mean, for each Trust which will
         issue additional Units pursuant to Section 2.03 hereof, (a) an equal 
         number of shares of each Equity Security with respect to The Dow 30 
         Index Trust, Series 6 and (b) the percentage relationship existing
         immediately prior to the related additional deposit of Securities among
         the maturity value per Unit of the Zero Coupon Obligations, each
         Security per Unit as a percent of all shares of Equity Securities and
         the sum of the maturity value per Unit of the Zero Coupon Obligations
         and all Equity Securities attributable to each Unit with respect to The
         Dow 30 Index and Treasury Trust, Series 8. The Percentage Ratio shall
         be adjusted to the extent necessary, and may be rounded, to reflect the
         occurrence of a stock dividend, a stock split or a similar event which
         affects the capital structure of the issuer of an Equity Security."

          8.    Section 1.01 (1), (3) and (4) shall be replaced in their 
entirety by the following:

                (1) "Depositor" shall mean Van Kampen Funds Inc. and its
succesors in interest, or any successor depositor appointed as hereinafter
provided.

                (3) "Evaluator" shall mean American Portfolio Evaluation
Services (a division of a Van Kampen Investment Advisory Corp.) and its
successors in interest, or any successor evaluator appointed as hereinafter
provided.

                (4) "Supervisory Servicer" shall mean Van Kampen Investment
Advisory Corp. and its successors in interest, or any successor portfolio
supervisor appointed as hereinafter provided.

          9. Notwithstanding anything to the contrary in the Standard Terms and
Conditions of Trust and subject to the requirements set forth in this paragraph,
unless the Prospectus otherwise requires, the Sponsor may, on any Business Day
(the "Trade Date"), subscribe for additional Units as follows:

                (a) Prior to the Evaluation Time on such Business Day, the
Sponsor shall provide notice (the "Subscription Notice") to the Trustee, by
telephone or by written communication, of the Sponsor's intention to subscribe
for additional Units. The Subscription Notice shall identify the additional
Securities to be acquired (unless such additional Securities are a precise
replication of the then existing portfolio) and shall either (i) specify the
quantity of additional Securities to be deposited by the Sponsor on the
settlement date for such subscription or (ii) instruct the Trustee to purchase
additional Securities with an aggregate value as specified in the Subscription
Notice.

                (b) Promptly following the Evaluation Time on such Business Day,
the Sponsor shall verify with the Trustee the number of additional Units to be
created.

                (c) Not later than the time on the settlement date for such
subscription when the Trustee is to deliver or assign the additional Units
created hereby, the Sponsor shall deposit with the Trustee (i) any additional
Securities specified in the Subscription Notice (or contracts to purchase such
additional Securities together with cash or a letter of credit in the amount
necessary to settle such contracts) or (ii) cash or a letter of credit in an
amount equal to the aggregate value of the additional Securities specified in
the Subscription Notice, and adding and subtracting the amounts specified in the
first and second sentences of Section 5.01, computed as of the Evaluation Time
on the Business Day preceding the Trade Date divided by the number of Units
outstanding as of the Evaluation Time on the Business Day preceding the Trade
Date, times the number of additional Units to be created.

                (d) On the settlement date for such subscription, the Trustee
shall, in exchange for the Securities and cash or letter of credit described
above, deliver to, or assign in the name of or on the order of, the Sponsor the
number of Units verified by the Sponsor with the Trustee.

         IN WITNESS WHEREOF, the undersigned have caused this Trust Agreement to
be executed and their corporate seals to be hereto affixed and attested; all as
of the day, month and year first above written.

                                   Van Kampen Funds Inc.

                                   By James J. Boyne
                                      Vice President

Attest:

By Nicholas Dalmaso
   Assistant Secretary

                                   American Portfolio Evaluation Services,
                                   a division of Van Kampen Investment Advisory
                                   Corp.

                                   By James J. Boyne
                                      Vice President

Attest

By Nicholas Dalmaso
   Assistant Secretary

                                   Van Kampen Investment Advisory Corp.

                                   By James J. Boyne
                                      Vice President

Attest

By Nicholas Dalmaso
   Assistant Secretary

                                   The Bank of New York

                                   By Jeffrey Cohen
                                      Vice President

Attest

By Robert Weir
   Assistant Treasurer

          SCHEDULE A TO TRUST AGREEMENT SECURITIES INITIALLY DEPOSITED
                                       IN
                     VAN KAMPEN FOCUS PORTFOLIOS, SERIES 124

(Note:  Incorporated herein and made a part hereof is each "Portfolio" as set 
forth in the Prospectus.)

                                                                     EXHIBIT 3.1
                               CHAPMAN AND CUTLER
                             111 WEST MONROE STREET
                             CHICAGO, ILLINOIS 60603

                                 January 5, 1999

Van Kampen Funds Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois  60181

     Re:  Van Kampen Focus Portfolios, Series 124
          ---------------------------------------

Gentlemen:

         We have served as counsel for Van Kampen Funds Inc. as Sponsor and
Depositor of Van Kampen Focus Portfolios, Series 124 (hereinafter referred to as
the "Trust"), in connection with the preparation, execution and delivery of a
Trust Agreement dated January 5, 1998, among Van Kampen Funds Inc., as
Depositor, American Portfolio Evaluation Services, a division of Van Kampen
Investment Advisory Corp., as Evaluator, Van Kampen Investment Advisory Corp.,
as Supervisory Servicer, and The Bank of New York, as Trustee, pursuant to which
the Depositor has delivered to and deposited the Securities listed in the
Schedule to the Trust Agreement with the Trustee and pursuant to which the
Trustee has provided to or on the order of the Depositor documentation
evidencing ownership of Units of fractional undivided interest in and ownership
of the Trust (hereinafter referred to as the "Units"), created under said Trust
Agreement.

         In connection therewith we have examined such pertinent records and
documents and matters of law as we have deemed necessary in order to enable us
to express the opinions hereinafter set forth.

         Based upon the foregoing, we are of the opinion that:

                    1.     The  execution and delivery of the Trust Agreement
         and the execution and issuance of certificates evidencing the Units in
         the Trust have been duly authorized; and

                    2. The certificates evidencing the Units in the Trust, when
         duly executed and delivered by the Depositor and the Trustee in
         accordance with the aforementioned Trust Agreement, will constitute
         valid and binding obligations of such Trust and the Depositor in
         accordance with the terms thereof.

         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement (File No. 333-68655) relating to the Units referred to
above and to the use of our name and to the reference to our firm in said
Registration Statement and in the related Prospectus.

                                        Respectfully submitted,

                                        CHAPMAN AND CUTLER

                                                                     EXHIBIT 3.2

                               CHAPMAN AND CUTLER
                             111 WEST MONROE STREET
                             CHICAGO, ILLINOIS 60603

                                 January 5, 1999

Van Kampen Funds Inc.
One Parkview Plaza
Oakbrook Terrace, Illinois  60181

The Bank of New York
101 Barclay Street
New York, New York  10286

         Re:       Van Kampen Focus Portfolios, Series 124
                   ---------------------------------------

Gentlemen:

         We have acted as counsel for Van Kampen Funds Inc., Depositor of Van
Kampen Focus Portfolios, Series 124 (the "Fund"), in connection with the
issuance of Units of fractional undivided interest in the Fund, under a Trust
Agreement dated January 5, 1998 (the "Indenture") among Van Kampen Funds Inc.,
as Depositor, Van Kampen Investment Advisory Corp., as Evaluator, Van Kampen
Investment Advisory Corp., as Supervisory Servicer, and The Bank of New York, as
Trustee. The Fund is comprised of two separate unit investment trusts, The Dow
30SM Index Trust, Series 6 and The Dow 30SM Index & Treasury Trust, Series 8.
The following discussion and opinion applies only to The Dow 30SM Index &
Treasury Trust, Series 8 (the "Trust").

         In this connection, we have examined the Registration Statement, the
Prospectus, the Indenture, and such other instruments and documents as we have
deemed pertinent.

         The assets of the Trust will consist of a portfolio of equity
securities (the "Equity Securities") and, if applicable, "Zero coupon" U.S.
Treasury bonds (the "Treasury Obligations") (collectively, the "Securities") as
set forth in the Prospectus. For purposes of the following discussion and
opinion, it is assumed that the Equity Securities are equity for federal income
tax purposes, the interest on the Treasury Obligations is included in gross
income for Federal income tax purposes and that the Treasury Obligations are
debt for Federal income tax purposes.

         Based upon the foregoing and upon an investigation of such matters of
law as we consider to be applicable, we are of the opinion that, under existing
United States Federal income tax law:

                   (i) The Trust is not an association taxable as a corporation
         for Federal income tax purposes; each Unitholder will be treated as the
         owner of a pro rata portion of each asset of the Trust under the
         Internal Revenue code of 1986, as amended (the "Code"); the income of
         the Trust will be treated as income of each Unitholder thereof under
         the Code, and an item of Trust income will have the same character in
         the hands of a Unitholder as it would have in the hands of the Trustee.
         Each Unitholder will be considered to have received his pro rata share
         of income derived from each Trust asset when such income is considered
         to be received by the Trust.

                  (ii) A Unitholder will have a taxable event when the Trust
         disposes of a Security (whether by sale, exchange, liquidation,
         redemption, payment at maturity or otherwise) or upon the sale or
         redemption of Units by such Unitholder. The price a Unitholder pays for
         his Units, generally including sales charges, is allocated among his
         pro rata portion of each Security held by the Trust (in proportion to
         the fair market values thereof on the valuation date closest to the
         date the Unitholder purchases his units) in order to determine his tax
         basis for his pro rata portion of each Security held by the Trust. The
         Treasury Obligations are treated as striped bonds and may be treated as
         bonds issued at an original issue discount as of the date a Unitholder
         purchases his Units. Because the Treasury Obligations represent
         interests in "stripped" U.S. Treasury bonds, a Unitholder's tax basis
         for his pro rata portion of each Treasury Obligation held by the Trust
         (determined at the time he acquires his Units, in the manner described
         above) shall be treated as its "purchase price" by the Unitholder.
         Original issue discount is effectively treated as interest for federal
         income tax purposes and the amount of original issue discount in this
         case is generally the difference between the bond's purchase price and
         its stated redemption price at maturity. A Unitholder will be required
         to include in gross income for each taxable year the sum of his daily
         portions of original issue discount attributable to the Treasury
         Obligations held by the Trust as such original issue discount accrues
         and will in general be subject to federal income tax with respect tot
         he total amount of such original issue discount that accrues for such
         year even though the income is not distributed to the Unitholders
         during such year to the extent it is not less than a "de minimis"
         amount as determined under Treasury Regulations relating to stripped
         bonds. To the extent the amount of such discount is less than the
         respective "de minimis" amount, such discount is generally treated as
         zero. In general, original issue discount accrues daily under a
         constant interest rate method which takes into account the semi-annual
         compounding of accrued interest. In the case of the Treasury
         Obligations, this method will generally result in an increasing amount
         of income to the Unitholders each year. For Federal income tax
         purposes, a Unitholder's pro rata portion of dividends as defined by
         Section 316 of the Code paid by a corporation with respect to an Equity
         Security held by the Trust are taxable as ordinary income to the extent
         of such corporation's current and accumulated "earnings and profits". A
         Unitholder's pro rata portion of dividends paid on such Equity Security
         which exceed such current and accumulated earnings and profits will
         first reduce a Unitholder's tax basis in such Equity Security, and to
         the extent that such dividends exceed a Unitholder's tax basis in such
         Equity Security shall generally be treated as capital gain. In general,
         the holding period of such capital gain will be determined by the
         period of time a Unitholder has held his Units.

                 (iii) A Unitholder `s portion of gain, if any, upon the sale or
         redemption of Units or the disposition of Securities held by the Trust
         will generally be considered a capital gain, except in the case of a
         dealer or a financial institution. A unitholder's portion of loss, if
         any, upon the sale or redemption of Units or the disposition of
         Securities held by the Trust will generally be considered a capital
         loss, except in the case of a dealer or a financial institution.

                  (iv) Under the Indenture, under certain circumstances, a
         Unitholder tendering Units for redemption may request an in kind
         distribution of Equity Securities upon the redemption of Units or upon
         the termination of the Trust. As previously discussed, prior to the
         redemption of Units or the termination of the Trust, a Unitholder is
         considered as owning a pro rata portion of each of the Trust's assets.
         The receipt of an in kind distribution will result in Unitholders
         receiving an undivided interest in whole shares of stock and possibly
         cash. The potential federal income tax consequences which may occur
         under an in kind distribution with respect to each Equity Security
         owned by the Trust will depend upon whether or not a Unitholder
         receives cash in addition to Equity Securities. An "Equity Security"
         for this purpose is a particular class of stock issued by a particular
         corporation. A Unitholder will not recognize gain or loss with respect
         to an Equity Security if a Unitholder only receives Equity Securities
         in exchange for his pro rata portion of the Equity Securities held by
         the Trust. However, if a Unitholder also receives cash in exchange for
         a fractional share of an Equity Security held by the Trust, such
         Unitholder will generally recognize gain or loss based upon the
         difference between the amount of cash received for the fractional share
         by the Unitholder and his tax basis in such fractional share of an
         Equity Security held by the Trust. In either case, a Unitholder who
         receives cash in exchange for his interest in the Treasury Obligations
         will generally recognize gain or loss based upon the difference between
         the amount of cash received by the Unitholder for the Treasury
         Obligations and his tax basis in such Treasury Obligations. The total
         amount of taxable gains (or losses) recognized upon such redemption
         will generally equal the sum of the gain (or loss) recognized under the
         rule described above by the redeeming Unitholder with respect to each
         Equity Security owned by a Trust.

         A domestic corporation owning Units in the Trust may be eligible for
the 70% dividends received deduction pursuant to Section 243(a) of the Code with
respect to such Unitholder's pro rata portion of dividends received by the Trust
(to the extent such dividends are taxable as ordinary income, as discussed
above, and are attributable to domestic corporations), subject to the
limitations imposed by Sections 246 and 246A of the Code.

         Section 67 of the Code provides that certain itemized deductions, such
as investment expenses, tax return preparation fees and employee business
expenses will be deductible by individuals only to the extent they exceed 2% of
such individual's adjusted gross income. Unitholders may be required to treat
some or all of the expenses of the Trust as miscellaneous itemized deductions
subject to this limitation.

         A Unitholder will recognize taxable gain (or loss) when all or part of
his pro rata interest in an Equity Security is either sold by the Trust or
redeemed or when a Unitholder disposes of his Units in a taxable transaction, in
each case for an amount greater (or less) than his tax basis therefor, subject
to various non-recognition provisions of the Code.

         Any gain or loss recognized on a sale or exchange will, under current
law, generally be capital gain or loss.

         The scope of this opinion is expressly limited to the matters set forth
herein, and, except as expressly set forth above, we express no opinion with
respect to any other taxes, including foreign, state or local taxes or
collateral tax consequences with respect to the purchase, ownership and
disposition of Units.

                                        Very truly yours

                                        CHAPMAN AND CUTLER

                                                                     EXHIBIT 3.3
                                WINSTON & STRAWN
                                 200 PARK AVENUE
                          NEW YORK, NEW YORK 10166-4193

                                 January 5, 1999

Van Kampen Focus Portfolios, Series 124
c/o The Bank of New York, As Trustee
101 Barclay Street, 17 West
New York, New York 10286

Dear Sirs:

         We have acted as special counsel for the Van Kampen Focus Portfolios,
Series 124 (the "Fund") consisting, among others of The Dow 30 Index and
Treasury Trust, Series 8 (individually a "Trust" and, in the aggregate, the
"Trusts") for purposes of determining the applicability of certain New York
taxes under the circumstances hereinafter described.

         The Fund is created pursuant to a Trust Agreement (the "Indenture"),
dated as of today (the "Date of Deposit") among Van Kampen Funds Inc. (the
"Depositor"), American Portfolio Evaluation Services, a division of an affiliate
of the Depositor, as Evaluator, Van Kampen Investment Advisory Corp., an
affiliate of the Depositor, as Supervisory Servicer, and The Bank of New York,
as trustee (the "Trustee"). As described in the prospectus relating to the Fund
dated today to be filed as an amendment to a registration statement heretofore
filed with the Securities and Exchange Commission under the Securities Act of
1933, as amended (respectively the "Prospectus" and the "Registration
Statement") (File Number 333-68655), the objectives of the Fund are to provide
the potential for dividend income and capital appreciation through investment in
a fixed portfolio of actively traded equity securities of companies engaged in,
providing services to companies in, the industry identified in Trust's name, or
are the type of securities identified in the name of the Trusts. It is noted
that no opinion is expressed herein with regard to the Federal tax aspects of
securities, the Trust, units of the Trust (the "Units"), or any income, gains or
losses in respect thereof.

         As more fully set forth in the Indenture and in the Prospectus, the
activities of the Trustee will include the following:

         On the Date of Deposit, the Depositor will deposit with the Trustee
with respect to the Trust the securities and/or contracts and cash for the
purchase thereof together with an irrevocable letter of credit in the amount
required for the purchase price of the securities comprising the corpus of the
Trust as more fully set forth in the Prospectus.

         The Trustee did not participate in the selection of the securities to
be deposited in the Trust, and, upon the receipt thereof, will deliver to the
Depositor a registered certificate for the number of Units representing the
entire capital of the Trust as more fully set forth in the Prospectus. The
Units, which are represented by certificates ("Certificates"), will be offered
to the public upon the effectiveness of the Registration Statement.

         The duties of the Trustee, which are ministerial in nature, will
consist primarily of crediting the appropriate accounts with cash dividends and
interest received by the Trust and with the proceeds from the disposition of
securities held in the Trust and the distribution of such cash dividends,
interest and proceeds to the Unit holders. The Trustee will also maintain
records of the registered holders of Certificates representing an interest in
the Trust and administer the redemption of Units by such Certificate holders and
may perform certain administrative functions with respect to an automatic
investment option.

         Generally, securities held in the Trust may be removed therefrom by the
Trustee at the direction of the Depositor upon the occurrence of certain
specified events which adversely affect the sound investment character of the
Trust, such as default by the issuer in payment of declared dividends or of
interest or principal on one or more of its debt obligations.

         Prior to the termination of the Trust, the Trustee is empowered to sell
securities designated by the Supervisor only for the purpose of redeeming Units
tendered to it and of paying expenses for which funds are not available. The
Trustee does not have the power to vary the investment of any Unit holder in the
Trust, and under no circumstances may the proceeds of sale of any securities
held by the Trust be used to purchase new securities to be held therein.

         Article 9-A of the New York Tax Law imposes a franchise tax on business
corporations, and, for purposes of that Article, Section 208(l) defines the term
"corporation" to include, among other things, "any business conducted by a
trustee or trustees wherein interest or ownership is evidenced by certificate or
other written instrument."

         The Regulations promulgated under Section 208 provide as follows:

                  A business conducted by a trustee or trustees in which
                  interest or ownership is evidenced by certificate or other
                  written instrument includes, but is not limited to, an
                  association commonly referred to as a "business trust" or
                  "Massachusetts trust". In determining whether a trustee or
                  trustees are conducting a business, the form of the agreement
                  is of significance but is not controlling. The actual
                  activities of the trustee or trustees, not their purposes and
                  powers, will be regarded as decisive factors in determining
                  whether a trust is subject to tax under Article 9-A. The mere
                  investment of funds and the collection of income therefrom,
                  with incidental replacement of securities and reinvestment of
                  funds, does not constitute the conduct of a business in the
                  case of a business conducted by a trustee or trustees. 20
                  NYCRR 1-2.5(b)(2) (July 11, 1990).

         New York cases dealing with the question of whether a trust will be 
subject to the franchise tax have also delineated the general rule that where a 
trustee merely invests funds and collects and distributes the income therefrom, 
the trust is not engaged in business and is not subject to the franchise tax.
Burrell v. Lynch, 274 A.D. 347, 84 N.Y.S.2d 171 (3rd Dept. 1948), order
resettled, 274 A.D. 1083, 85 N.Y.S.2d 705 (3rd Dept. 1949).

         In an Opinion of the Attorney General of the State of New York, 47 N.Y.
Att'y. Gen. Rep. 213 (Nov. 24, 1942), it was held that where the trustee of an
unincorporated investment trust was without authority to reinvest amounts
received upon the sales of securities and could dispose of securities making up
the trust only upon the happening of certain specified events or the existence
of certain specified conditions, the trust was not subject to the franchise tax.

         In the instant situation, the Trustee is not empowered to, and we
assume will not, sell securities contained in the corpus of the Trust and
reinvest the proceeds therefrom. Further, the power to sell such securities is
limited to circumstances in which the credit-worthiness or soundness of the
issuer of such security is in question or in which cash is needed to pay
redeeming Unit holders or to pay expenses, or where the Trust is liquidated
subsequent to the termination of the Indenture. In substance, the Trustee will
merely collect and distribute income and will not reinvest any income or
proceeds, and the Trustee has no power to vary the investment of any Unit holder
in the Trust.

         Under Subpart E of Part I, Subchapter J of Chapter 1 of the Internal
Revenue Code of 1986, as amended (the "Code"), the grantor of a trust will be
deemed to be the owner of the trust under certain circumstances, and therefore
taxable on his proportionate interest in the income thereof. Where this Federal
tax rule applies, the income attributed to the grantor will also be income to
him for New York income tax purposes. See TSB-M-78(9)(c), New York Department of
Taxation and Finance, June 23, 1978.

         By letter, dated today, Messrs. Chapman and Cutler, counsel for the
Depositor, rendered their opinion that each Unit holder will be considered as
owning a share of each asset of a Trust in the proportion that the number of
Units held by such holder bears to the total number of Units outstanding and the
income of a Trust will be treated as the income of each Unit holder in said
proportion pursuant to Subpart E of Part I, Subchapter J of Chapter 1 of the
Code.

         Based on the foregoing and on the opinion of Messrs. Chapman and
Cutler, counsel for the Depositor, dated today, upon which we specifically rely,
we are of the opinion that under existing laws, rulings and court decisions
interpreting the laws of the State and City of New York:

          1. The Trust will not constitute an association taxable as a
corporation under New York law, and, accordingly, will not be subject to tax on
its income under the New York State franchise tax or the New York City general
corporation tax;

          2. The income of the Trust will be treated as the income of the Unit 
holders under the income tax laws of the State and City of New York; and

          3. Unit holders who are not residents of the State of New York are not
subject to the income tax laws thereof with respect to any interest or gain
derived from the Trust or any gain from the sale or other disposition of the
Units, except to the extent that such interest or gain is from property employed
in a business, trade, profession or occupation carried on in the State of New
York.

         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement relating to the Units and to the use of our name and the
reference to our firm in the Registration Statement and in the Prospectus.

                                        Very truly yours,

                                        WINSTON & STRAWN

                                                                     EXHIBIT 4.1

                                Interactive Data
                                 14 West Street
                               New York, NY 10005

                                January 5, 1999

Van Kampen Funds Inc.
One Parkview Plaza
Oakbrook Terrace, IL 60181

         Re:      The Dow 30 Index Trust, Series 6 and
                  The Dow 30 Index and Treasury Trust, Series 8,
                  (A Unit Investment Trust) Registered Under the Securities
                  Act of 1933, File No. 333-68655

Gentlemen:

         We have examined the Registration Statement for the above captioned
Fund.

         We hereby consent to the reference in the Prospectus and Registration
Statement for the above captioned Fund to Interactive Data Corporation, as the
Evaluator, and to the use of the Obligations prepared by us which are referred
to in such Prospectus and Statement.

         You are authorized to file copies of this letter with the Securities
and Exchange Commission.

                                        Very truly yours,

                                        James Perry
                                        Vice President

                                                                     EXHIBIT 4.2

                INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS' CONSENT

         We have issued our report dated January 5, 1999 on the statements of
condition and related securities portfolios of Van Kampen Focus Portfolios,
Series 124 as of January 5, 1999 contained in the Registration Statement on Form
S-6 and Prospectus. We consent to the use of our report in the Registration
Statement and Prospectus and to the use of our name as it appears under the
caption "Other Matters-Independent Certified Public Accountants."

                                        GRANT THORNTON LLP

Chicago, Illinois
January 5, 1999


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