Document:

EXHIBIT 10.49
                                                                   -------------

                          REGISTRATION RIGHTS AGREEMENT

                           DATED AS OF: March 15, 2001

                  With reference to that certain Amended and Restated Promissory
Note dated as of even date herewith (the "Promissory Note") by and between, S.
Brewer Enterprises, Inc. a corporation ("Brewer") and COMMODORE APPLIED
TECHNOLOGIES, INC., a Delaware corporation ("CXI"), whereby Brewer loaned CXI
Five Hundred Thousand Dollars ($500,00.00) and that certain Warrant dated
September 15, 2000 (the "Warrant") by and between, Brewer and CXI, and in order
to induce the Brewer to enter into the Promissory Note and the Warrant, and for
other valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereby agree as follows:

                  1. As soon as practicable following receipt by CXI of each
notice that Brewer has exercised his (i)Warrant to acquire shares of common
stock of CXI or (ii) right to convert all or a portion of the indebtedness
arising under the Promissory Note into shares of common stock of CXI, CXI shall
register on a short form registration statement under the Securities Act of
1933, as amended (the "Securities Act"), not less than that number of shares of
CXI Common Stock issuable to the Brewer pursuant to each such exercise of the
Warrant. Such shares are referred to hereinafter as the "Registrable
Securities."

                  2. Until a Registration Statement has become effective under
the Securities Act with respect to any Registrable Securities, each certificate
representing such Registrable Securities, and all certificates and instruments
issued in transfer thereof, shall be endorsed with the following restrictive
legend:

         "THE SHARES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
         AND HAVE BEEN TAKEN FOR INVESTMENT PURPOSES ONLY AND NOT WITH A VIEW TO
         THE DISTRIBUTION THEREOF, AND NEITHER SUCH SHARES NOR ANY INTEREST
         THEREIN MAY BE SOLD, TRANSFERRED, ASSIGNED OR PLEDGED, EXCEPT IF
         REGISTERED UNDER THE SECURITIES ACT AND APPLICABLE STATE BLUE SKY OR
         SECURITIES LAWS OR EXEMPTIONS FROM SUCH REGISTRATION OR QUALIFICATION
         REQUIREMENTS ARE AVAILABLE."

At such time as any Registrable Securities cease to be Registrable Securities
pursuant to Section 1, CXI shall, upon the request of any Stockholder with
respect to such securities, issue to such Stockholder a replacement certificate
without such legend in exchange for any certificate bearing such legend.

<PAGE>

                  3. If any of a Brewer's Registrable Securities are registered
hereunder, CXI shall furnish to such Stockholder, at CXI's expense, such number
of copies of the Registration Statement and each amendment and supplement
thereto, preliminary prospectus, final prospectus and such other documents as
Brewer may reasonably requests.

                  4. If any of Brewer's Registrable Securities are registered
hereunder, CXI shall promptly, at CXI's expense, use its reasonable efforts to
register or qualify the Registrable Securities covered by the Registration
Statement under such state securities or blue sky laws of such jurisdictions as
Brewer may reasonably request, except that CXI shall not for any purpose be
required to execute a general consent to service of process or to qualify to do
business as a foreign corporation in any jurisdiction where it is not so
qualified.

                  5. If Brewer's Registrable Securities are registered
hereunder, CXI shall notify Brewer, promptly after it shall receive notice
thereof, of the date and time when the Registration Statement and each
post-effective amendment thereto has become effective or a supplement to any
prospectus forming a part of the Registration Statement has been filed.

                  6. If Brewer's Registrable Securities are registered
hereunder, CXI shall advise Brewer, promptly after it shall receive notice or
obtain knowledge thereof, of the issuance of any stop order by the Securities
Exchange Commission (the "Commission") suspending the effectiveness of the
Registration Statement or the initiation or threatening of any proceeding for
such purpose and promptly use its best efforts to prevent the issuance of any
stop order or to obtain its withdrawal if such stop order should be issued.

                  7. If Brewer's Registrable Securities are registered
hereunder, (a) CXI agrees to bear all Commission registration and filing fees,
printing and mailing expenses, NASD filing fees and expenses incurred by any
person or entity in connection therewith, fees, disbursements of counsel and
accountants for CXI and any underwriters, brokers and dealers and all expenses
and fees incident to an application for listing the shares of CXI Common Stock
on the American Stock Exchange, and (b) Brewer agrees to bear, pro rata (or as
they may otherwise agree), all fees and disbursements of counsel for Brewer and
any discounts, commissions and fees of any underwriters, brokers and dealers
with respect to the Registrable Securities sold in connection with such
registration.

                  8. (a) CXI hereby agrees to indemnify and hold harmless Brewer
from and against, and agrees to reimburse Brewer with respect to, any and all
claims, actions (actual or threatened), demands, losses, damages, liabilities,
costs and expenses to which Brewer may become subject under the Securities Act
or otherwise, insofar as such claims, actions, demands, losses, damages,
liabilities, costs or expenses are caused by any untrue statement or alleged
untrue statement of any material fact contained in the Registration Statement,
any prospectus contained therein, or any amendment or supplement thereto, or are
caused by the omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading; provided, however, that CXI shall not be liable in any such case to

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the extent that any such claim, action, demand, loss, damage, liability, cost or
expense is caused by an untrue statement or alleged untrue statement or omission
or alleged omission so made in conformity with information furnished in writing
by Brewer for use in the preparation thereof.

                      (b) Brewer  hereby  agrees to indemnify  and hold harmless
CXI, its officers,  directors,  legal counsel and accountants and each person or
entity who  controls  CXI within the  meaning of the  Securities  Act,  from and
against,  and agrees to reimburse CXI, its officers,  directors,  legal counsel,
accountants  and  controlling  persons or entities  with  respect to any and all
claims, actions,  demands,  losses, damages,  liabilities,  costs or expenses to
which  CXI,  its  officers,   directors,  legal  counsel,  accountants  or  such
controlling  persons or entities may become  subject under the Securities Act or
otherwise,   insofar  as  such  claims,  actions,   demands,   losses,  damages,
liabilities,  costs or  expenses  are  caused by any  untrue or  alleged  untrue
statement of any material  fact  contained in the  Registration  Statement,  any
prospectus  contained  therein or any  amendment or supplement  thereto,  or are
caused by the  omission  or the  alleged  omission  to state  therein a material
required to be stated  therein or necessary to make the statements  therein,  in
light of the circumstances in which they were made, not misleading, in each case
to the  extent,  but only to the extent that such  untrue  statement  or alleged
untrue  statement or omission or alleged  omission was so made in reliance  upon
and in conformity with information furnished in writing by Brewer for use in the
preparation thereof.

                      (c) If any claim shall be  asserted  against any person or
entity (an "Indemnified Person") for which such person or entity intends to seek
indemnification pursuant to Section 8(a) or (b) from the other party hereto (the
"Indemnifying  Person"),  as the case may be, such Indemnified Person shall give
prompt  written notice to the  Indemnifying  Person of the nature of such claim,
but the failure to give such notice shall not relieve the Indemnifying Person of
its obligations under this Section 8 unless it has been prejudiced substantially
thereby.  The  Indemnifying  Person  shall  have the  right to  conduct,  at its
expense,  through counsel of its own choosing,  which counsel is approved by the
Indemnified  Person  (which  approval  may not be  unreasonably  withheld),  the
defense of any such  claim,  and may  compromise  or settle such claims with the
prior consent of the Indemnified Person (which consent shall not be unreasonably
withheld);  provided,  that (i) if the  Indemnifying  Person  does not  elect to
conduct the defense of any such claim,  the Indemnified  Person may undertake to
conduct  the  defense  of  such  claim  and the  Indemnifying  Person  shall  be
responsible for the fees and  disbursements  of the  Indemnified  Person's legal
counsel in connection with such defense and (ii) if the person or entity that is
not conducting the defense  desires to join in such defense,  it may elect to do
so at its own cost by retaining legal counsel acceptable to the person or entity
conducting the defense (which acceptance shall not be unreasonably withheld).

                  9. The rights and privileges of this Registration Rights
Agreement may inure to the benefit of other stockholders of the Company;
provided, that CXI's obligations to any one or more such stockholders shall be
subject to their execution of an addendum or joinder agreement substantially
similar in form and content to this Agreement.

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                  10. THIS AGREEMENT SHALL BE CONSTRUED (BOTH AS TO VALIDITY AND
PERFORMANCE)  AND  ENFORCED IN  ACCORDANCE  WITH AND GOVERNED BY THE LAWS OF THE
STATE OF DELAWARE  APPLICABLE  TO  AGREEMENTS  MADE AND TO BE  PERFORMED  WHOLLY
WITHIN SUCH JURISDICTION

         IN WITNESS  WHEREOF,  this Agreement has been duly executed by or on
behalf of each party hereto on the date 15th day of March 2001.

                                     COMMODORE APPLIED TECHNOLOGIES, INC.

                                     By:     /s/ James M. DeAngelis
                                     -------------------------------------------
                                     James M. DeAngelis, Chief Financial Officer

                                     S. BREWER ENTERPRISES, INC.

                                     By:   /s/ Shelby T. Brewer
                                     -------------------------------------------
                                     Shelby T. Brewer, President

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<PAGE>EXHIBIT 10.50
                                                                   -------------

$250,000.00                                                    November 13, 2000

                             SECURED PROMISSORY NOTE

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

         This Note has not been registered  under the Securities Act of 1933, as
amended,  or  any  state  securities  laws,  and  no  sale,  transfer  or  other
disposition of any interest herein or therein may be made unless, in the written
opinion  of counsel  to the  Corporation,  such  transfer  would not  violate or
require registration under any such statute.

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

         1. Background.  This Note is issued pursuant to the Securities Purchase
Agreement  dated November 10, 2000 (the "Purchase  Agreement")  among  Commodore
Environmental Services, Inc. (the "COES"), Commodore Applied Technologies,  Inc.
("CXI" or the  "Borrower"),  the Holder (as  defined  below) and  certain  other
purchasers of notes of similar tenor,  issued from time to time pursuant to such
agreement (collectively, the "Notes").

         2. Payment. The Borrower, for value received, hereby promises to pay to
the order of Klass  Partners,  Ltd (the "Holder"),  the principal  amount of TWO
HUNDRED  FIFTY  THOUSAND  DOLLARS  ($250,000.00),  together with interest on the
outstanding  principal  balance  hereunder  on the  earliest to occur of (i) the
prepayment of the Notes out of one hundred  percent (100%) of the first proceeds
received by CXI as a cash  distribution  (whether in the form of an intercompany
dividend, bonus, loan or otherwise) from Dispute Resolution Management,  Inc., a
Utah  corporation   ("DRM")  an  81%  owned  subsidiary  of  CXI,  or  (ii)  the
consummation of a contemplated Two Million Dollars  ($2,000,000)  debt financing
with BHC Funding,  Inc. or (iii) on February 12, 2001 (the "Maturity Date"). All
payments of principal and/or interest shall be paid as set forth below, and each
such payment  shall be made in lawful  money of the United  States of America by
wire  transfer  of  immediately  available  funds  of the  Borrower  payable  to
Greenberg  Traurig,  LLP, as attorneys for the benefit of the CXI investors,  as
follows:

                                TO: Citibank N.A.
                        153 East 53rd Street - 20th Floor
                               New York, NY 10043
                                 ABA # 021000089
                              Attn: Adrianna Arroyo

                        FOR CREDIT TO: Greenberg Traurig
                          Escrow Account No.: 37092076
                     REFERENCE: Name: CXI Investors Account
                            File Number: 20440.010700
                         Attorney Name: Stephen A. Weiss

<PAGE>

         or at such other address as the Holder shall from time to time indicate
by written notice to Borrower.

         The  outstanding  principal  balance of this Note  shall  bear  simple,
non-cumulative  interest from the date hereof until paid in full, at an interest
rate of twelve percent (12%) per annum.  Accrued  interest on this Note shall be
payable on the Maturity Date.

         By  acceptance  of this Note,  the Holder  agrees that it will promptly
deliver and surrender this Note to the Borrower upon full payment  thereof,  and
that it will promptly  notify the Borrower of any disposition of the Note and of
the name and address of the  transferee of this Note. For purposes of this Note,
the  Borrower  may assume  that the  registered  Holder is the holder  hereunder
unless notified to the contrary in the manner provided in Section 4.

         This Note may be prepaid, in whole or in part, at any time, on five (5)
business days prior notice, without penalty.

         3. Events of Default.  Any of the following  events which occur and are
continuing shall constitute an "Event of Default":  (a) if the Borrower defaults
in the payment of any principal or interest  under this Note when the same shall
become  due and  payable,  either by the terms  hereof  or  otherwise  as herein
provided,  and such  default  is not cured  within  five (5) days of the date of
notice of such  default;  (b) if a receiver,  trustee or other such  official is
appointed for the Borrower,  or if any  proceedings  are commenced by or against
the Borrower  under any  bankruptcy,  reorganization,  arrangement,  insolvency,
readjustment  of debt,  dissolution or liquidation law or statute of the federal
government  or any state  government  and, if such  proceedings  are  instituted
against the Borrower, the Borrower by any action or failure to act indicates his
approval of, consent to or  acquiescence  therein,  or an order shall be entered
approving the petition in such proceeding and, within forty-five (45) days after
the entry thereof, such appointment or order is not vacated, or stayed on appeal
or otherwise, or shall not otherwise have ceased to continue in effect or (c) if
the Borrower  breaches any material  covenants  set forth in any of the Purchase
Agreement or any  Ancillary  Agreement  (as such term is defined in the Purchase
Agreement)  and such  breach  is not  cured  within  thirty  (30) days of notice
thereof.  Upon the  occurrence  of an Event of  Default,  the  entire  principal
balance and all unpaid  accrued  interest of this Note  shall,  at the  Holder's
option,  become  immediately  due and payable upon written notice thereof to the
Borrower.

         4.  Communications  and  Notices.   Except  as  otherwise  specifically
provided herein,  all communications and notices provided for in this Note shall
be sent by first  class  mail,  facsimile  or  telegram  to the  Holder at Klass
Partners, Ltd., 391 Brooke Avenue, Toronto, Ontario M5M 2L5, Canada,  attention:
Misha Krakowsky, Fax (416) 781-2988 or the Borrower at 150 East 58th Street, New
York, New York 10155, attention:  James DeAngelis, Chief Financial Officer, Fax:
(212) 753-0731.  Any first-class mail notice provided pursuant to this Section 4
shall be deemed  given  three days after being sent by first-class mail. Notices

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<PAGE>

sent by  telegram or  facsimile  shall be deemed  received  upon  delivery.  The
Borrower and the Holder may from time to time change their respective addresses,
for  purposes  of this  Section  4, by  written  notice  to the  other  parties;
provided,  however,  that notice of such  change  shall be  effective  only upon
receipt.

         5.  Governing  Law;  Jurisdiction.  This  Note  shall be  construed  in
accordance  with and  governed  by the laws of the  State of New  York.  For the
purposes of any suit, action or proceeding involving this Note, the Borrower and
the Holder  hereby  expressly  submit  itself to the  jurisdiction  of the state
courts of the State of New York and to the  jurisdiction  of the  United  States
District Court for the State of New York,  and consent that any order,  process,
notice of motion or other application to or by any such court or a judge thereof
may be served within or without such court's  jurisdiction  by certified mail or
by personal service,  provided that a reasonable time for appearance is allowed,
and the  Borrower  and the Holder  agree that such  court  shall have  exclusive
jurisdiction  over any such suit,  action or  proceeding  commenced by either or
both of said parties.  The Borrower and the Holder hereby  irrevocably waive any
objection  that it may now or hereafter have to the laying of venue of any suit,
action or  proceeding  arising out of or  relating  to this Note  brought in the
state courts of the State of New York or in the United States District Court for
the State of New York and hereby  further  irrevocably  waive any claim that any
such suit, action or proceeding brought in any such court has been brought in an
inconvenient forum.

         6.  Assignment.  This Note shall  bind and inure to the  benefit of the
respective successors and assigns of the parties hereto;  provided that Borrower
shall not be permitted to assign its obligations hereunder.

         7.  Security.  This Note shall be secured  by a  security  interest  in
certain assets of the  Corporation as set forth in the Security  Agreement dated
the date hereof by and among the Corporation and the Holders.

         8.  Waiver.  No waiver of a right in any  instance  shall  constitute a
continuing waiver of successive rights, and any one waiver shall govern only the
particular  matters  waived.  The  Borrower  expressly  waives any  presentment,
demand, protest, notice of protest, or notice of any kind.

         9. Collection Costs. In the event that the Holder shall place this Note
in the hands of an attorney for collection  during the  continuance of any Event
of Default, the Borrower shall further be liable to the Holder for all costs and
expenses  (including  reasonable  attorneys'  fees) which may be incurred by the
Holder in enforcing  this Note,  which amounts may, at the Holder's  option,  be
added to the principal hereof.

         10. Waiver of Jury Trial.  THE BORROWER  EXPRESSLY  WAIVES ANY RIGHT TO
TRIAL BY JURY OF ANY CLAIM, DEMAND,  ACTION OR CAUSE OF ACTION (A) ARISING UNDER
THIS NOTE OR ANY OTHER INSTRUMENT,  DOCUMENT OR AGREEMENT  EXECUTED OR DELIVERED
IN  CONNECTION  HEREWITH,  OR  (B) IN ANY  WAY  CONNECTED  WITH  OR  RELATED  OR
INCIDENTAL TO THE DEALINGS OF THE PARTIES  HERETO OR ANY OF THEM WITH RESPECT TO
THIS NOTE OR ANY OTHER INSTRUMENT,  DOCUMENT OR AGREEMENT  EXECUTED OR DELIVERED
IN CONNECTION  HEREWITH,  OR THE TRANSACTIONS  RELATED HERETO OR THERETO IN EACH

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<PAGE>

CASE WHETHER NOW EXISTING OR HEREAFTER ARISING, AND WHETHER SOUNDING IN CONTRACT
OR TORT OR OTHERWISE;  AND THE BORROWER HEREBY AGREES AND CONSENTS THAT ANY SUCH
CLAIM, DEMAND, ACTION OR CAUSE OF ACTION SHALL BE DECIDED BY COURT TRIAL WITHOUT
A JURY,  AND THAT ANY PARTY MAY FILE AN ORIGINAL  COUNTERPART  OR A COPY OF THIS
SECTION WITH ANY COURT AS WRITTEN  EVIDENCE OF THIS WAIVER OF THE RIGHT TO TRIAL
BY JURY.

         IN WITNESS  WHEREOF,  the Borrower  has executed  this Note on the date
first above written.

                                    COMMODORE APPLIED TECHNOLOGIES, INC.

                                    By:   /s/ Paul E. Hannesson
                                    --------------------------------------------
                                    Paul E. Hannesson, Chairman, Chief Executive
                                    Officer and President

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<PAGE>

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