IMMUNOMEDICS INC
10-Q/A, 1995-07-18
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                                UNITED STATES
                     
                     SECURITIES AND EXCHANGE COMMISSION
                          
                          Washington, D.C.  20549

               
                                 FORM 10-Q/A
                              (AMENDMENT NO. 1)
                    
Quarterly Report Pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934.

For the period ended           March 31, 1995.

Commission File Number:    0-12104

                              IMMUNOMEDICS, INC.

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

          Delaware                                 61-1009366
(State or other jurisdiction of          (IRS Employer Identification No.)
incorporation or organization)


300 American Road, Morris Plains, New Jersey       07950
(Address of principal executive offices)         (Zip code)

(201) 605-8200
(Registrant's telephone number, including area code)

   Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15 (d) of the Securities Exchange
Act of 1934 during the preceding 12 months (or for such shorter period
that the registrant was required to file such reports), and (2) has been
subject to such filing requirements for the past 90 days.


                                 [X] Yes  [ ] No
                        

   Indicate the number of shares outstanding of each of the issuer's classes 
of common stock as of the latest practicable date.

   As of May 8, 1995 there were 30,274,585 shares of the registrant's common 
stock outstanding.
<PAGE>


PART II - Other Information:

Item 6.   Exhibits and Reports on Form 8-K

          (a)  Exhibits

               10.20     License Agreement, dated as of March 10, 1995,
                         between the Registrant and Mallinckrodt
                         Medical, B.V.  * Confidential portions 
                         omitted and filed separately with the Commission.


<PAGE>


     
                            SIGNATURES


     Pursuant to the requirements of the Securities Exchange Act of 1934, 
the Registrant has duly caused this report to be signed on its behalf by 
the undersigned, thereunto duly authorized.

                                            
                                        IMMUNOMEDICS, INC.
                                        (Registrant)        
                                         



     DATE:  July 18, 1995               /s/ David M Goldenberg
                                        David M. Goldenberg,
                                        Chairman of the Board and
                                        Chief Executive Officer
                                        (Principal Executive Officer)



     DATE:  July 18, 1995               /s/ Amy Factor
                                        Amy Factor, 
                                        Executive Vice President
                                        (Principal Accounting Officer)


                                                Execution Copy



* Confidential portions omitted and filed separately with the Commission.  




                   LICENSE AGREEMENT









               Dated as of March 10, 1995


                        Between


                    IMMUNOMEDICS, INC.

                          and

               MALLINCKRODT MEDICAL, B.V.

<PAGE>
                     License Agreement
                         
                         
                         
     This License Agreement is made and effective as of the 10th day of
March, 1995, by and between Immunomedics Inc., a Delaware corporation
located at 300 American Road, Morris Plains, New Jersey, USA (hereinafter
referred to as IMMU) and Mallinckrodt Medical, B.V., a corporation
organized under the laws of The Netherlands with its principal offices
located at Westerduinweg 3, Petten, The Netherlands (hereinafter referred 
to as "MM")

     WHEREAS, IMMU possesses rights in and to an in-vivo diagnostic
imaging product known as CEA-Scan , and IMMU desires to expedite the
establishment of CEA-Scan  as a significant product in the European
pharmaceutical and nuclear medicine marketplace; and

     WHEREAS, IMMU has completed Phase III clinical trials for CEA-Scan for 
colorectal cancer imaging, has Phase III clinical trials for CEA-Scan 
underway for lung cancer imaging and is in the process of completeing 
Phase II clinical trials for CEA-Scan  for breast cancer imaging; and

     WHEREAS, MM, has considerable knowledge in distributing, 
promoting, detailing and marketing nuclear medicine products in Europe and
has in place an experienced distribution, marketing and selling organization
to address all key European markets; and

     WHEREAS, MM desires to obtain the exclusive rights to distribute
CEA-Scan  in European markets for use in colorectal, breast and lung
cancer imaging; and 

     WHEREAS, MM is willing to commit substantial financial resources
as well as its distribution, marketing and selling organization to the
introduction and promotion of CEA-Scan  in Europe, and MM is willing to
assist IMMU in establishing and monitoring selected studies (other than full
scale clinical trials) in European clinical centers relating to breast and 
lung cancer imaging; and

     WHEREAS, IMMU believes that a  distribution, promotion, and
marketing arrangement with MM regarding CEA-Scan  would be desirable
and fully compatible with IMMU's worldwide marketing and business
objectives with respect to CEA-Scan ;

     NOW, THEREFORE, in consideration of the premises and the mutual
covenants contained herein, IMMU and MM hereby agree as follows:

<PAGE>
                     ARTICLE 1
                         
                    DEFINITIONS
                         
As used herein, the following terms shall have the meanings described below:

1.01      "Affiliate" shall mean, with respect to any Person, any other
          Person which, directly or indirectly, owns or controls, or is
          owned or controlled by, or is under common control with, the
          specified Person.  For purposes of this definition, the term
          "control" (including, with correlative meanings, the terms
          "controlling", "controlled by", and "under common control
          with") as applied to any Person, means the possession, directly
          or indirectly, of the power to direct or cause the direction of the
          management of that Person, whether through ownership of
          voting securities, by means of contractual arrangements or
          otherwise. 

1.02      "Agreement" shall mean this License Agreement, as the same
          may be modified, amended or supplemented from time to time.

1.03      "Confidential Information" shall mean information relating to the
          business, products or services of a party to this Agreement which
          is either non-public, confidential or proprietary in nature;
          provided, however, that Confidential Information shall not
          include (i) information which has come within the public domain
          through no fault or action of the other party; (ii) information that
          was known to the other party on prior to its disclosure hereunder
          or in connection with the negotiation of this Agreement; or (iii)
          information which becomes rightfully available to the other party
          on a non-confidential basis from any third party, the disclosure
          of which to such other party does not violate any contractual or
          legal obligation the third party has to the first party with respect
          to such Confidential Information.  Without limiting the
          generality of the foregoing, Confidential Information shall
          include: (x) information which relates to the Product and its
          manufacture, sale or use, including financial statements, costs
          and expense data, marketing and consumer data, production data,
          know-how, trade secrets, secret processes and formulae,
          technical data and reports including pharmacological, clinical,
          chemical, biochemical, toxicological, pharmacokinetic,
          manufacturing and formulation data, or any other information
          relating to the Product which is not generally ascertainable from
          public or published information, regardless of whether such
          information was provided pursuant to the terms of this
          Agreement, by request of the other party or in any other manner;
          (y) information developed or to be developed by a party to this
          Agreement, its Affiliates, and/or clinicians, and all material and
          information submitted to and/or filed with a governmental
          regulatory agency or any other equivalent agency covering the
          Product; and (z) information related to the Product contained in
          all documents submitted in connection with regulatory
          submissions throughout the world covering the Product,
          including, by way of example: New Drug Applications
          ("NDAs"), Clinical Trial Certificates ("CTCs"), Product License
          Applications ("PLAs"), and Autorisations de Mise au Marche
          ("AMMs").

<PAGE>
1.04      "Coordinator" shall mean the individual designated as the
          principal representative of a party pursuant to the provisions of
          Section 5.01 hereof.

1.05      "Coordinating Committee" shall mean the committee of
          representatives of IMMU and MM established pursuant to the
          provisions of Section 5.02 hereof. 

1.06      "Distribution Date" as to each country within the Territory shall
          mean the first date upon which the Product is distributed for
          commercial sale to independent third parties in such country. The
          "First Distribution Date" shall mean the first of such Distribution
          Dates in a Major Market.

1.07      "Effective Date" shall mean the date first written above. 

1.08      "FDA" shall mean the U.S. Food & Drug Administration.

1.09      "Gross Sales" shall mean the gross invoiced price for the sales of
          the Product (i) to end users, in the case of sales by MM or its
          Affiliates, or (ii) to local distributors, in the case of sales by
          Recognized Agents; provided, however, that Gross Sales shall
          exclude sales of the Product which are intended for resale (x)
          between MM and its Subdistributors or (y) among such
          Subdistributors.

1.10      "IMMU Patents" shall mean those patents owned by IMMU or
          exclusively licensed to IMMU covering the Product.

1.11      "Major Market" shall mean each and any one of the following
          countries: Germany, France, Italy, and the United Kingdom.

1.12      "Net Sales" shall mean Gross Sales less (i) any credits and
          allowances actually granted by MM or its Subdistributors to their
          respective customers with respect to the Product, including,
          without limitation, credits and allowances on account of price
          adjustments, returns, discounts, and charge-backs, each only to
          the extent given by such Person in the ordinary course of
          business to its customers, (ii) any sales, excise, value-added,
          turnover or similar taxes and any duties and other governmental
          charges imposed upon the importation, use or sale of the
          Product, (iii) transportation, insurance and handling expenses if
          separately invoiced and directly chargeable to such sales.  For
          the purpose of computing Net Sales, MM shall first compute the
          conversion of the applicable sales figure from the local currency
          into U.S. Dollars, utilizing the "average exchange rate", as
          hereinafter defined, for the calendar quarter in which such Net
          Sales were made.  The "average exchange rate" shall be
          computed by (i) adding the mid-point between the buying and
          selling exchange rates of local currency into U.S. Dollars, as
          published in The Wall Street Journal, at the close of business on
          the last business day of each month of such quarter and (ii)
          dividing the sum by three (3).

1.13      "Net Selling Price Per Vial" shall mean, as to any semi-annual
          period, the Net Sales for such period divided by the number of
          vials of Product sold by MM and its Subdistributors during such
          period.

<PAGE>
1.14      "Person" shall mean any individual, corporation, partnership,
          business trust, business association, governmental entity,
          governmental authority or other legal entity.

1.15      "Product" shall mean IMMU's in-vivo cancer diagnostic imaging
          agent consisting of a murine anti-CEA monoclonal antibody 
          Fab' fragment, known as ("IMMU-4" or "CEA-Scan ").  The
          term Product shall include, without limitation, bulk forms of the
          Product ("Bulk Vialed Product") and/or finished and packaged
          dosage units of the Product ("Finished Product").

1.16      "Recognized Agent" shall mean a Person who is not an Affiliate
          of MM and who MM uses in the normal course of its business to
          market or distribute its products in a particular country within the
          Territory.

1.17      "Subdistributor" shall mean (i) any Affiliate of MM or (ii) any
          Recognized Agent of MM appointed as a Subdistributor of MM
          under and pursuant to the provisions of Section 3.05.

1.18      "Territory" shall mean the countries within Europe listed on
          Schedule A hereto , subject to the elimination from such list of
          certain countries pursuant to the provisions of Section 2.03
          hereof.  


                     ARTICLE 2
                         
          APPOINTMENT AND LICENSE GRANTS
                         

2.01      Appointment.  IMMU hereby appoints MM as its exclusive
          distributor to launch, detail, promote, advertise, distribute and
          sell the Product  for use in colorectal, breast and lung cancer
          diagnostic imaging in every country in the Territory during the
          term of this Agreement. 

2.02      License.  In furtherance of its position as IMMU's exclusive
          distributor in the Territory, IMMU hereby grants MM an
          exclusive, royalty free, license during the term of this Agreement
          (i) under the IMMU Patents to use and sell the Product in the
          Territory for colorectal, breast and lung cancer diagnostic
          imaging, and (ii) to use IMMU's Confidential Information and
          the trademark CEA-Scan  or such other mark(s) as IMMU shall
          cause to be registered for the Product in the Territory in
          connection with the use and sale of the Product for colorectal,
          breast and lung cancer diagnostic imaging.  This license shall not
          restrict IMMU's right to license or use its patents, trademarks or
          Confidential Information for other purposes which do not
          conflict with MM's rights hereunder or in other territories. 

<PAGE>
2.03      Territory. It is the parties intent that the Territory shall include
          those European countries in which MM has the intention to take
          an active role, either directly or through Subdistributors, in the
          registration and marketing of the Product and in which, during
          the term of this Agreement, it uses its best efforts consistent with
          accepted business practices in the marketing of nuclear imaging
          products and legal requirements to register and actively market
          the Product.  If at any time during the term of this Agreement,
          MM shall decide that it has no interest in marketing the Product
          in a particular country within the Territory, it shall so notify
          IMMU in writing.  In addition, if by the second anniversary of
          the date of this Agreement, MM has not developed and
          implemented a marketing plan (as contemplated by Section 5.03
          hereof) with respect to a particular country within the Territory,
          IMMU shall have the right to notify MM in writing of its
          election to proceed on its own or seek to obtain another
          distributor or agent in such country.  Upon delivery of any such
          notice by either party, the country or countries identified in such
          notice shall, for all purposes under this Agreement, cease to be
          included within the definition of the Territory.  Upon any such
          reduction in the Territory, the parties shall enter into good faith
          negotiations to make suitable arrangements to effect an orderly
          transition and to permit progress to be made in the registration
          and marketing of the Product in the particular country. 

2.04      Reservation of Rights.  IMMU reserves to itself and its Affiliates
          the right to manufacture, market and sell the Product in and for
          countries located outside the Territory, including without
          limitation, the right to appoint other Persons as marketing
          representatives, distributors and manufacturers for sale of the
          Product outside of the Territory.

                   ARTICLE 3
                         
         ACCEPTANCE; MARKETING OBLIGATIONS
                         
3.01      Acceptance. MM shall use its best efforts consistent with
          accepted business practices in the marketing of nuclear imaging
          products and legal requirements to launch, detail, promote,
          advertise, distribute and sell the Product  for use in colorectal,
          breast and lung cancer diagnostic imaging in every country in the
          Territory during the term of this Agreement exercising the same
          diligence and adhering to the same standards as MM would
          adopt in launching, detailing, promoting, advertising, distributing
          and selling a major nuclear medicine or pharmaceutical product
          of its own innovation, with the objective to make the Product the
          market leader in its field of intended use.

3.02      Promotion Standard. In launching, detailing, promoting,
          advertising, distributing and selling the Product, MM shall
          maintain and adhere strictly to the diagnostic claims of the
          Product as established by IMMU and approved by the health
          authorities in each country in the Territory. All promotional
          materials prepared by MM and all promotional activities relating
          to the Product sold by MM shall comply with all applicable laws
          and regulations of the health authorities in each country in the
          Territory.

<PAGE>
3.03      MM's Authority/Responsibility. During the term of this
          Agreement, except as otherwise expressly herein provided, MM
          shall have the sole right and responsibility to take such actions
          with respect to the Product as would normally be done in
          accordance with accepted business practices in the marketing of
          nuclear imaging products and legal requirements to obtain and
          maintain the authorization and/or ability to market a major
          nuclear medicine product in the countries in the Territory and to
          actively market the Product within such countries, including,
          without limitation, the following:

               (i)  responding to product and medical complaints
                    relating to the Product.  As called for by Section
                    8.01 hereof, each party shall promptly advise the
                    other of any such complaints which it receives
                    from regulators, customers or patients in the
                    Territory;

               (ii) handling all returns of the Product.  Should the
                    Product be returned to IMMU, IMMU shall ship
                    it to MM's designated facility, with any
                    reasonable or authorized shipping or other
                    documented direct cost to be paid by MM.
                    IMMU, at its option, may advise the customer
                    who made the return that the Product has been
                    returned to MM;

               (iii)handling, in accordance with Section 8.02 hereof,
                    all recalls of the Product; 

               (iv) communicating with any governmental agencies
                    and satisfying their requirements regarding the
                    authorization and/or continued authorization to
                    market the Product in commercial quantities in
                    the Territory; 

               (v)  handling Product distribution, inventory and
                    receivables; and 

               (vi) labeling and packaging of Product in finished
                    dosage units on a commercial scale for the
                    Territory.

3.04      Notice of Distribution Dates.  MM shall notify IMMU of the
          Distribution Date in each country within the Territory as soon a
          practicable after the occurrence of the sale giving rise to such
          Distribution Date. 

3.05      Subdistributors.  MM may appoint one or more of its Affiliates
          or one or more Recognized Agents to act as a Subdistributor for
          the Product in the Territory, provided that no such appointment
          shall affect MM's duties and responsibilities hereunder. Attached
          hereto as Schedule D is a list of all MM Affiliates that MM
          currently contemplates will be involved in the distribution of the
          Product, as well as a list of intended Recognized Agents.  MM
          shall have the right to appoint as a Subdistributor any of the
          organizations listed on Schedule D, as the same may be amended
          from time to time, provided, that MM promptly notifies IMMU
<PAGE>          
          of each such proposed appointment.   MM shall have the right to
          amend Schedule D by notice to IMMU, provided that no such
          amendment shall be effective for (30) days after the delivery of
          such notice and provided, further, that if an organization which
          MM seeks to add to Schedule D in any such notice is deemed by IMMU
          to be a competitor of IMMU, or IMMU has any other reasonable
          business objection to the inclusion of such organization on Schedule
          D, IMMU will so notify MM within such thirty (30) day period and MM
          shall not appoint such organization as a Subdistributor, nor shall
          such organization's name be added to Schedule D. Except as provided
          in this Section 3.05, MM shall not appoint any Subdistributors for
          the Product.  MM shall be fully responsible for, and liable to IMMU
          for, the compliance by its Subdistributors with the terms and 
          conditions of this Agreement. The rights of all Subdistributors
          shall be subordinate to and derivative of those of MM, and no
          Subdistributor shall acquire, nor shall MM purport to grant to any
          Subdistributor, any rights with respect to the Product, IMMU's 
          patents, trademarks or Confidential Information which are greater 
          than those of MM or extend for any term beyond the term of this 
          Agreement. 

3.06      Sales for Export.  MM shall not export the Product from the
          Territory and shall use reasonable diligence to ensure that
          Products sold by MM are not sold with a view to export from the
          Territory.  Correspondingly, IMMU shall not export the Product
          into the Territory except to MM, and shall use reasonable
          diligence to ensure that Products sold outside the Territory are
          not sold with a view to export into the Territory. 

3.07      Non Compete.  During the term of this Agreement MM shall not
          launch, detail, promote, advertise, distribute or sell in the
          Territory a monoclonal antibody based in-vivo  diagnostic
          imaging product which competes with the Product for colorectal,
          breast or lung cancer indications.

3.08      Minimum Marketing and Selling Efforts. Without limiting its
          obligations under Section 3.01 above, with respect to each calendar
          year of the term of this Agreement MM shall at a minimum expend, in
          accordance with standard cost accounting, the amounts specified in
          Schedule B for promotion,marketing and selling activities
          exclusively relating to the Product,training relating exclusively 
          to the Product, regulatory authorization and compliance efforts 
          relating exclusively to the Product, and other miscellaneous efforts
          relating exclusively to the distribution and sale of the Product. 
          MM shall deliver to IMMU a certificate within forty-five (45) days 
          after each calendar year during the term of this Agreement setting 
          forth in reasonable detail the actual amounts actually expended by 
          MM for promotion, marketing, selling, training, regulatory 
          authorization and compliance, and other miscellaneous expenditures 
          relating to the Product during such period.

3.09      Office Space.  During the term of this Agreement, at IMMU's
          request from time to time, MM shall make available to IMMU at
          no cost to IMMU office space at its offices in Hennef, Germany
          (consisting of space reasonably adequate for at least two
          employees), together with related secretarial and office support,
          to facilitate the performance by employees of IMMU of their
          responsibilities under this Agreement.

<PAGE>
                    ARTICLE IV
                         
      PRODUCT REGISTRATIONS; COUNTRY PRICING

4.01      IMMU Registration Activities.  IMMU shall use all reasonable
          diligence in pursuing the processing of submissions necessary to
          obtain regulatory approval of the Product by the Committee for
          Proprietary Medicinal Products ("CPMP") for use as an in vivo 
          colorectal cancer diagnostic imaging agent.  IMMU shall make
          available to MM all such submissions and all data included to
          support such submissions necessary for MM to perform its
          obligations under this Agreement, and, through its Coordinator,
          shall keep MM fully apprised of the status of its registration
          efforts with respect to the Product with the CPMP, all to
          facilitate MM's ability to meet its undertaking under Section 4.02
          hereof.

4.02      MM Registration Activities.   MM shall apply for and use all
          reasonable diligence in obtaining governmental registrations and
          other licenses and permits necessary for the importation into, and
          the promotion, marketing, sale and distribution of the Product as
          an in vivo  colorectal cancer diagnostic imaging agent in each of
          the individual countries within the Territory.  Given the data and
          submissions provided to it in English by IMMU, MM shall put
          such submissions in an appropriate format for application to each
          specific country.  All such registrations, permits and licenses
          shall be obtained in the name of IMMU, with MM named therein
          as the distributor in the Territory.  MM shall provide IMMU
          promptly with copies of all correspondence and documentation
          in connection with obtaining such registrations, licenses and
          permits. MM will provide IMMU with a minimum of three (3)
          written regulatory status updates each calendar year of the term
          of the Agreement.   IMMU shall be responsible for the payment
          of all product registration fees, provided,  that through the
          Coordinating Committee the parties will weigh the costs of such
          registration fees in particular countries against the market
          opportunities in such countries, and IMMU shall not be required
          to pay a registration fee in any country in which it believes that
          the market potential is inadequate to justify the payment of
          registration fee.  

4.03      Regulatory Changes. Each party shall promptly advise the other
          party of any known new instructions or specifications relating to
          the Product required by the health regulatory authorities of any
          country within the Territory, and the parties shall confer with
          respect to the best mode of compliance with such new
          requirements.

4.04      Clinical Studies.  To the extent required in connection with the
          registration of the Product for use as an in vivo  colorectal cancer
          diagnostic imaging agent in a specific country within the
          Territory, the parties shall cooperate to develop, monitor and
          analyze such additional clinical studies as may be so required. 
          The nature and scope of such studies, and the sharing of the costs
          of such studies, shall be determined by good faith negotiations
          between the parties, and the conduct of such studies shall be
          coordinated through the Coordinating Committee. IMMU shall
          

<PAGE>
          supply MM at no cost to MM with Product for all such clinical
          studies approved by the Coordinating Committee, provided,
          however, that Product supplied at no cost shall be taken into
          consideration in the cost sharing arrangements relating to such
          studies. Nothing herein contained shall be construed to require
          MM to contribute to the cost of any Phase II or Phase III clinical
          trials with respect to the Product.  

4.05      Breast and Lung Cancer Indications.  The Coordinating
          Committee will develop, and in good faith seek to agree upon, a
          regulatory strategy for the Territory for the breast and lung
          cancer diagnostic imaging indications of the Product.  The costs
          of implementing any clinical studies component of such
          regulatory strategy shall be shared by IMMU and MM, as
          determined in good faith negotiations between the parties.
          Nothing herein contained shall be construed to require MM to
          contribute to the cost of any Phase II or Phase III clinical trials
          with respect to the Product.  If further research indicates that
          either or both of the lung and breast cancer indications are
          unlikely to meet the objectives of the regulatory strategy
          developed by the Coordinating Committee, the parties will
          execute an amendment to this Agreement removing all
          obligations on the part of MM to market or sell the Product for
          such indications and causing all rights in respect of such
          indications to revert to IMMU.  Any expenses which shall have
          accrued prior to the date of such amendment shall continue to be
          borne by the parties in the proportions, or under the allocation
          methodology, established by the Coordinating Committee.  

4.06      Country Pricing.  As to each country within the Territory, MM
          shall make all required filings and conduct all necessary pricing
          negotiations with the appropriate health authorities to establish
          the pricing and reimbursement for the Product in such country. 
          In such activities, MM shall seek to obtain the most favorable
          pricing and reimbursement rates, with the same diligence as it
          applies to products of its own innovation.  In addition, through
          the Coordinating Committee, MM shall consult with IMMU
          regarding pricing and reimbursement strategies and keep IMMU
          fully apprised of the status of pricing negotiations with
          regulatory authorities; provided, however, that MM shall have
          the sole authority to agree upon such pricing and reimbursement
          with such authorities in each country as, in its discretion, it
          determines to be appropriate.   


                     ARTICLE 5
                         
    COORDINATING COMMITTEE AND MARKETING PLANS


5.01      Coordinators. The parties shall each appoint one individual
          ("Coordinator ") who shall be the principal representative of such
          party with respect to all matters arising under this Agreement and
          who shall be responsible to coordinate communications from the
          other party to and within his or her respective organization.  Each
          party will notify the other as to the name of the individual so
          appointed.  Each party may replace its Coordinator at any time,
<PAGE>
          upon notice to the other party. The Coordinators will confer in
          person at IMMU's offices or at another location agreeable to
          IMMU, from time to time, but no less than quarterly to discuss
          and to coordinate the effective performance of the terms of this
          Agreement. Among their other functions, the Coordinators will
          be responsible to discuss and coordinate the exchange and
          development of information and data to obtain and maintain
          regulatory approvals of the Product in each of the countries
          within the Territory and the strategies and programs that should
          be developed to most effectively and efficiently obtain such
          approvals.  The Coordinators shall also exchange such
          information (other than information obtained under an obligation
          of confidentiality from a third party) as either party has obtained
          relevant to the marketing and selling of the Product as may be
          useful to the other party in its marketing efforts.

5.02      Coordinating Committee.  The Coordinators shall establish a
          committee ("Coordinating Committee") consisting of three
          representatives from each party (comprising, in each case, the
          Coordinator for such party, one regulatory affairs officer and one
          additional senior executive) to act as a forum (i) to periodically
          review the progress that has been made in the regulatory
          approval of the Product and the marketing of the Product, (ii) to
          discuss the strategic and tactical plans for marketing of the
          Product in the Territory and the strategies and programs that
          should be developed to maximize sales of the Product, (iii) to
          make the determinations called for by Sections 4.04 and 4.05 and
          (iv) in which each of the parties will in good faith seek to resolve
          issues or disagreements under, or regarding the interpretation of,
          this Agreement. Any individuals selected by a party as
          representatives on such Committee may be changed at any time
          by such party upon notice to the other party.  The Coordinating
          Committee shall meet periodically as reasonably requested by
          either Coordinator, but in any event no less than semi-annually
          within each calendar year of the term of this Agreement. 
          Meetings of the Coordinating Committee shall take place,
          alternately, at the principal offices of each party or by means of
          video conferencing equipment.  No meeting of the Coordinating
          Committee shall, for purposes of this Agreement, be validly
          constituted unless at least two members representing each party
          shall be in attendance (a quorum of the Committee), and no
          action shall be taken or deemed validly taken by the Committee
          unless such action shall have been approved by unanimous vote
          of the members of the Committee participating at a meeting at
          which a quorum is present.  All actions validly taken by the
          Committee shall be duly recorded in minutes of the Committee
          prepared by a member of the Committee selected for that
          purpose at any given meeting, shall be furnished to each party by
          its respective Coordinator and shall be retained by each party as
          part of its records of actions taken with respect to this
          Agreement. To the extent that the Committee is deadlocked on
          any matter brought before the Committee, the Committee shall
          refer such matter to the Chief Executive Officers of the parties
          who shall in good faith seek to resolve the dispute.  Each party
          shall bear its own cost incurred in participation in the
          Coordinating Committee.

<PAGE>
5.03      Marketing Plans; Sales Forecasts.  Within thirty (30) days after
          the Effective Date, and thereafter no later than March 1 of each
          fiscal year of MM occurring during the term of the Agreement,
          MM shall present its proposed marketing plan for the
          forthcoming fiscal year (July 1 to June 30), including planned
          pre-launch and launch activities, detailing, promotion and
          marketing strategies relating to the Product for each of the
          countries within the Territory and estimates of the costs and
          expenses to implement such proposed marketing plan. Such
          proposed marketing plan shall also include sales forecasts with
          respect to each of the countries in the Territory for such
          forthcoming fiscal year.  The Coordinating Committee shall
          review and discuss such proposed marketing plan and sales
          forecasts at a meeting convened within thirty (30) days after
          delivery of such plan and forecasts, and MM shall in good faith
          take into account changes to such proposed marketing plan
          recommended by the Coordinating Committee representatives of
          IMMU.  Based upon such review and recommendations, within
          thirty (30) days after such Coordinating Committee meeting and
          in any event, as to plans for all years after 1995, no later than
          June 1 of each fiscal year of MM during the term of this
          Agreement, MM shall deliver to IMMU its final marketing plan
          for the forthcoming fiscal year (each an "Annual Marketing
          Plan").  IMMU hereby acknowledges that any such Annual
          Marketing Plan only represents MM's best estimate of its plans
          and performance for the forthcoming fiscal year and does not
          represent any performance guarantee on the part of MM.  At
          each subsequent meeting of the Coordinating Committee, MM
          shall present a report of its fulfillment of the objectives of the
          then current Annual Marketing Plan.  

5.04      IMMU Marketing Right's. IMMU shall have the right, in its sole
          discretion, to supplement MM's marketing and selling effort with
          respect to the promotion of the Product in the Territory by
          making expenditures of up to    *    in any twelve month
          period.  Prior to any exercise of such right, IMMU shall give
          notice thereof to MM, either through a presentation at a meeting
          of the Coordinating Committee or through communication
          between the Coordinators, and such notice shall specify in
          reasonable detail the activities which IMMU intends to undertake
          and the countries within the Territory in which it intends to
          undertake such efforts. IMMU shall deliver to MM a certificate
          on a quarterly basis setting forth in reasonable detail the amounts
          actually expended or incurred. If during either of the two
          successive twelve month periods commencing with the first day
          of the calendar quarter following the expenditure by IMMU of
          amounts in respect of such supplemental marketing, MM's actual
          Net Sales exceed MM's sales forecast as set forth in Schedule C
          hereto (appropriately prorated to the extent any such twelve
          month period covers more than one calendar year), MM shall
          reimburse IMMU for such supplemental marketing expenses by
          paying IMMU an amount equal to the lesser of: 
     
          a)    *    of MM's gross margin on such excess
             sales (being the difference between (x) the Net Selling
             Price Per Vial times the number of excess vials sold and
             (y) MM's purchase price to IMMU for such excess vials), or
<PAGE>
          b) the amount actually expended or incurred by IMMU for
             such supplemental marketing.

          MM shall make such reimbursement within sixty (60) days
          following the end of any such twelve month period.  

5.05      Sampling. To achieve the objectives of this Agreement, both
          parties recognize that,  to the extent allowable by law, it may be
          necessary to distribute a nominal quantity of the Product free of
          charge as samples to health care personnel and the trade on an
          ongoing basis ("Sampling Program").  For any such Sampling
          Program, the Coordinating Committee, from time to time, shall
          establish a reasonable sampling strategy, setting forth a sampling
          period, the number of samples to be distributed during such
          sampling period and the schedule for delivery of samples. 
          IMMU shall provide MM at no cost to MM for use in the
          Sampling Program: (i) 5% of MM's forecasted sales for the first
          two years of the term of this Agreement, and (ii) a reasonable
          quantity thereafter as agreed to by the Coordinating Committee. 
          In addition, IMMU shall provide MM at no cost samples for
          quality control and regulatory testing purposes. 

                     ARTICLE 6
                         
                      SUPPLY

6.01      Exclusive Supply; Requirements.  IMMU will sell to MM and
          MM will purchase from IMMU all of MM's requirements of the
          Product for sale in the Territory.  MM shall purchase such
          amounts and maintain such inventory of the Product as shall
          enable it to make prompt and timely delivery of the Product to
          customers in the Territory. 

6.02      IMMU's Supply Efforts.  IMMU shall use its best efforts to
          manufacture or otherwise supply sufficient quantities of the Bulk
          Vialed Product to MM, for all commercial purposes in the
          Territory.  

6.03      Finished Dose Packaging.  MM will, at its own expense, label
          and package the Finished Product (including the preparation and
          insertion of appropriate package inserts) for distribution and sale
          in each country in the Territory.  All such packaging, labeling
          and package insert materials prepared by MM shall comply with
          all applicable laws, regulations and guidelines of the health
          authorities in each country in the Territory.  MM shall bear any
          and all costs and expenses associated with labeling changes
          required by law.

6.04      Purchase Requirements MM shall provide IMMU at least three
          (3) months before the beginning of each fiscal year with a
          forecast of MM's total requirements for the Product in the
          upcoming fiscal year, which forecast shall be updated quarterly. 
          In the case of the first fiscal year commencing after the Effective
          Date, such forecast shall set forth the requirements for the period
          between the anticipated First Distribution Date and the end of
          such fiscal year. MM shall use its best efforts to make all
          forecasts and estimates required hereunder to be reasonably
<PAGE>          
          accurate predictions of the amount of Product MM will actually
          require for the Territory for the relevant period.  Except for the
          first order for delivery of Product for which a written order will
          be delivered to IMMU by MM within one (1) month after receipt
          of the first governmental approval in the Territory to market the
          Product,  the forecast for the most current three (3) month period
          shall constitute a firm order ("Firm Order Forecast") which (a)
          MM shall deliver to IMMU no later than 90 days prior to the
          commencement of each calendar quarter; (b) shall state in detail
          the quantities of Product ordered, dates for delivery of the
          Product and reasonable instructions for shipping; and (c) shall be
          binding on both parties regarding the amount of Product to be
          purchased.  The forecast for the remaining nine month period
          shall be for planning purposes only and shall not constitute a
          commitment to purchase or supply.  If the Firm Order Forecast
          is the same as or less than the most recent previous forecast or if
          it does not exceed the most recent previous forecast by more than
          15%, then IMMU shall confirm the Firm Order Forecast.  If the
          Firm Order Forecast exceeds the most recent forecast by more
          than 15%, then IMMU shall endeavor to accommodate MM but
          IMMU shall have no obligation to accept and confirm the excess. 

6.05      Shipping Terms.  All orders for the Product submitted by MM to IMMU
          hereunder shall be delivered Free Carrier (Incoterms 1990) at
          IMMU's manufacturing facilities nearest to the destination of
          shipment. All customs, duties, costs, taxes, insurance premiums and
          other expenses relating to the transportation and delivery of the
          Product shall be at MM's expense.  Title to, and risk of loss of
          and damage to, any shipment shall pass immediately to MM when the 
          shipment is deposited with a common carrier for delivery.  If
          requested to do so by MM, IMMU shall use reasonable efforts to
          assist MM in arranging any desired insurance (in amounts MM shall
          reasonably determine) and transportation to destinations in the
          Territory specified in writing by MM.

6.06      Acceptance.  MM shall have a maximum of thirty (30) days from
          the date of its receipt of any shipment of Product to test for
          quality and quantity and to accept or reject such shipment.  In the
          event MM does not notify IMMU of acceptance or rejection
          within such thirty-day period, all of the Product in such shipment
          shall be deemed to be accepted. If MM believes that any
          shipment of Product hereunder does not meet the specifications
          warranted by IMMU as provided in Section 10.01 hereof, MM
          shall so notify IMMU in writing indicating the particular lot,
          time of delivery and the defective nature of the Product.  If MM
          notifies IMMU of any defect in a shipment of Product, IMMU
          shall have the right, but not the obligation, to send one or more
          quality control representatives to retest such Product in
          co-operation with quality control representatives of MM.  MM shall
          store all shipments of the Product in accordance with storage
          specifications established by IMMU.  In the event of a disagreement
          between MM and IMMU regarding the quality of one or more shipments
          of Product, the parties shall submit samples of the shipment in
          question to an independent testing laboratory (selected by mutual
          agreement of MM and IMMU) to make a determination, which shall be
          binding upon the parties, as to the compliance or lack of
          compliance of such shipment with the specifications warranted by 
          IMMU.  IMMU shall promptly credit MM for any defective shipments.

<PAGE>
6.07      Conflicting Terms.  This Agreement sets forth the entire
          understanding between the parties relating to the subject matter
          hereof and shall govern all transactions between the parties
          contemplated hereby.  Except for terms relating only to:
          quantities, ship dates and delivery destinations, none of the terms
          and conditions contained on any purchase order, invoice or
          similar document shall have any effect upon or change the
          provisions of this Agreement unless signed by both parties and
          clearly indicating that the parties intend to vary the terms hereof. 

                     ARTICLE 7
                         
             PRODUCT PRICING; PAYMENT

7.01      Purchase Price.  MM shall purchase the Product from IMMU at
          the greater of a fixed price per vial or a specified percentage of
          the Net Selling Price Per Vial, with such fixed price and
          specified percentage being determined by the calendar year in
          which the Product is purchased from IMMU, as follows:

                                                              Year Three
            Year One                 Year Two               and thereafter

              *  /vial                 * /vial                  * /vial
          or  *  of Net            or  *  of Net            or  *  of Net
          Selling Price            Selling Price            Selling Price
            Per Vial                 Per Vial                 Per Vial

          provided, however, that Product delivered to MM for clinical
          studies as contemplated by Sections 4.04 or 4.05 shall be provided
          by IMMU to MM at no cost to MM, and Product delivered to MM for the
          Sampling Program contemplated by Section 5.05 and for quality
          control and regulatory testing shall be provided by IMMU to MM at
          no cost to MM.  MM shall be credited for all Product found to be
          defective under the provisions of Section 6.06

7.02      Invoicing; Payment.  IMMU shall invoice the Product for each
          shipment at the then applicable fixed price per vial as specified
          in Section 7.01 above.  MM shall pay IMMU for each shipment
          of Product at the invoiced price within thirty (30) days from the
          receipt of such shipment.  

7.03      Semi-Annual Adjustment.  Within thirty (30) days after each
          successive June 30 and December 31 during the term of this
          Agreement, MM shall prepare and deliver to IMMU a certificate
          with supporting data in reasonable detail ("Net Selling Price
          Certificate"), setting forth the Net Sales during the preceding six
          month period -- in the aggregate and broken down by each
          country within the Territory, the number of vials sold during
          such period -- in the aggregate and in each country, and the Net
          Selling Price Per Vial.  If the Net Selling Price Per Vial
          multiplied by the applicable percentage specified in Section 7.01
          for the relevant calendar year exceeds the corresponding fixed
          price per vial for such year, then MM shall pay to IMMU an
          amount equal to such excess multiplied by the total number of
          vials sold to MM during such six month period. Such payment
          shall be made by MM simultaneously with the delivery of the
          Net Selling Price Certificate.    

<PAGE>
7.04      Currency. All payments by MM to IMMU under this Agreement
          shall be made in U.S. Dollars and, except as otherwise expressly
          provided, all references in this Agreement  to dollars shall be
          deemed to mean and refer to U.S. Dollars.

                     ARTICLE 8
                         
                COMPLAINTS/RECALLS

8.01      Complaints. To the extent that it has knowledge thereof, each
          party shall promptly notify the other in writing of any defect in,
          or condition of, the Product which may cause the Product to
          violate the U.S. Federal Food, Drug and Cosmetic Act or Section
          352 of the U.S. Public Health Service Act or any material
          regulations promulgated thereunder, or similar applicable laws
          and regulations of any country in the Territory where the Product
          is being sold by MM.  IMMU and MM shall share with each
          other all data on complaints respecting the Product, including,
          but not limited to, complaints or information regarding
          performance or allegations or reports of any effects on a patient
          from use of such Product, as soon as such data is available.

8.02      Recall. In the event that either party has reason to believe that
          one or more lots of Product should be recalled or withdrawn
          from distribution, such party shall immediately notify the other
          party in writing.  To the extent permitted by the circumstances,
          the parties, through their respective Coordinators, will confer
          before initiating any recall, but the decision as to whether or not
          to initiate a recall of Product in any country in the Territory shall
          be MM's alone. MM shall maintain adequate sales and service
          records to enable it to carry out any Product recall and to conduct
          such recall.  If the recall is required because of a modification of
          the registrations, permits or licenses for the Product or a failure
          of the Product to conform to its specifications as provided to the
          health authorities in any specific country in connection with the
          registration of the Product, IMMU shall reimburse MM for the
          costs and expenses of such recall, and, at MM's option, IMMU
          shall replace recalled Product or credit or refund the purchase
          price of recalled Product.  If the recall is required because of a
          negligent act or omission of MM in handling, storage or
          distribution of the Product, then such recall shall be conducted
          by MM at its sole cost and expense and MM shall not be entitled
          to any such credits, replacements or refunds from IMMU.  If
          such recall is required because of a joint act or omission,  MM
          shall conduct the recall and the parties shall negotiate in good
          faith an appropriate allocation of the costs and expense of such
          recall. 

8.03      Regulatory Records; Adverse Reactions. Each party shall be
          responsible for maintaining such records and making such
          reports as may be required in connection with any regulatory
          approval held by the party.  Each party shall promptly inform the
          other of all adverse drug experience reports and other
          information relating to the safety or effectiveness of the Product
          which come to its attention, in a form and within time periods
          necessary to permit compliance with all applicable regulatory
          requirements under FDA regulations or the law and regulations
          of each of the countries within the Territory.

<PAGE>
                     ARTICLE 9
                         
       PRODUCT IDENTIFICATION AND TRADEMARK

9.01      Use of IMMU Trademarks. IMMU hereby grants MM the non-exclusive 
          right during the term of this Agreement to use the
          Immunomedics logo and the mark "Immunomedics", in addition
          to its right to use the trademark CEA-Scan  or such other
          mark(s) as IMMU shall cause to be registered for the Product as
          contemplated by Section 2.02 hereof, (collectively the "Marks")
          in the Territory in connection with, and confined to the purpose
          of, the sale, marketing and distribution of the Product.  To the
          extent permitted by applicable law in each country within the
          Territory, MM shall use the Marks on labeling, packaging and
          package inserts for the Product, in all of MM's promotion of the
          Product and in all literature related thereto, and with the
          exception of MM's corporate identification for the Product,
          which shall be given no greater prominence than the Marks, MM
          shall not use any other trademarks or logos on any labeling, 
          packaging, package inserts, literature or promotional material
          relating to the Product.  MM shall comply with and observe the
          reasonable requirements of IMMU relating to (i) the marking of
          the Product and/or its label, packaging, package insert or other
          printed materials pursuant to any and all applicable patent laws
          to indicate that letters patent have been applied for or granted in
          one or more countries and (ii) the use of the Marks in conformity
          with the trademark laws of the countries in the Territory.  Prior
          to its use, MM shall submit all such labeling, packaging, package
          inserts, promotional material and related literature to IMMU for
          its approval of the use of such Marks, which approval shall not
          be unreasonably withheld by IMMU. 

9.02      Ownership of Marks.  MM acknowledges that the Marks are and shall
          remain the property of IMMU, and MM disclaims any rights to such
          Marks other than the rights granted by Section 9.01 hereof.  MM
          shall not use the Marks or any other IMMU trademark, trade or brand
          name for any purpose other than as provided in such Section 9.01. 

                    ARTICLE 10
                         
          WARRANTIES AND INDEMNIFICATION

10.01          Manufacturing Warranty. IMMU warrants that (i) the Product
          shall be produced in accordance with FDA's current good
          manufacturing practices, (ii) when shipped to MM the Product
          shall not be adulterated or misbranded and (iii) the Product shall
          be otherwise manufactured in accordance with written
          manufacturing procedures and finished product specifications
          which will meet the requirements set forth in the governmental
          submissions filed by IMMU, or approved by IMMU for filing,
          with health regulatory authorities in the Territory.  IMMU HEREBY
          DISCLAIMS ALL OTHER WARRANTIES REGARDING THE PRODUCT, EXPRESS OR
          IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
          PARTICULAR PURPOSE.  Except as otherwise expressly provided in this
          Agreement, the liability of IMMU for a breach of the foregoing 
          warranty shall be limited to the specific shipments of the Product
          as to which a claim is made, and IMMU shall not be liable for
          incidental or consequential damages, loss of profit, or loss of use.  

<PAGE>
10.02          Corporate Authority.  Each party warrants and represents to the
          other that it has the full right and authority to enter into this
          Agreement, that all corporate action necessary to authorize the
          execution and delivery of this Agreement by such party has been
          duly and properly taken, and that it is not aware of any
          impediment that would inhibit its ability to perform its
          obligations under this Agreement.

10.03          MM Indemnification.  With respect to Product sold by MM in
          the Territory,  MM shall defend IMMU, its agents, directors,
          officers and employees at its cost and expense, and will
          indemnify and hold harmless IMMU, its agents, directors,
          officers, and employees from and against any and all claims for
          losses, costs, damages, fees or expenses arising out of or in
          connection with the commercialization, marketing, use or sale of
          the Product in the Territory, including but not limited to, any
          actual or alleged injury, damage, death or other consequence
          occurring to any person as a result, directly or indirectly, of the
          possession, use or consumption of the Product, whether claimed
          by reason of breach of warranty, negligence, product defect or
          otherwise and regardless of the form in which any such claim is
          made, provided that the foregoing indemnity shall not apply to
          the extent that any actual or alleged injury, damage, death or
          other consequence occurring to any person is specifically and
          proximately due a breach by IMMU of the warranty set forth in
          Section 10.01 above.

10.04          IMMU Indemnification. IMMU shall defend MM, its agents,
          directors, officers and employees at its cost and expense, and will
          indemnify and hold harmless MM, its agents, directors, officers
          and employees, from and against any and all losses, costs,
          damages, fees or expenses arising out of a breach by IMMU of
          the warranty set forth in Section 10.01 above, including, but not
          limited to, any actual or alleged injury, damage, death or other
          consequence occurring to any person as a result, directly or
          indirectly, of the possession, use or consumption of any Product,
          whether claimed by reason of negligence, product defect or
          otherwise, and regardless of the form in which any such claim is
          made.

10.05          Indemnification Procedures.  (a) Promptly after the receipt by
          any party hereto of notice under Section 10.03 or 10.04 of (A)
          any claim or (B) the commencement of any action or proceeding,
          such party (the "Aggrieved Party") will, if a claim with respect
          thereto is to be made against any party obligated to provide
          indemnification (the "Indemnifying Party") pursuant to such
          Sections 10.03 and 10.04, give such Indemnifying Party written
          notice of such claim or the commencement of such action or
          proceeding and shall permit the Indemnifying Party to assume
          the defense of any such claim or any litigation resulting from
          such claim, and, upon such assumption, shall cooperate fully
          with the Indemnifying Party in the conduct of such defense. 
          Failure by the Indemnifying Party to notify the Aggrieved Party
          of its election to defend any such action within a reasonable time,
          but in no event more than fifteen days after notice thereof shall
          have been given to the Indemnifying Party, shall be deemed a
          waiver by the Indemnifying Party of its right to defend such
          action.  If the Indemnifying Party assumes the defense of any
<PAGE>          
          such claim or litigation resulting therefrom, the obligations of the
          Indemnifying Party as to such claim shall be limited to taking all
          steps necessary in the defense or settlement of such claim or
          litigation resulting therefrom and to holding the Aggrieved Party
          harmless from and against any and all losses, damages and
          liabilities caused by or arising out of any settlement approved by
          the Indemnifying Party or any judgment in connection with such
          claim or litigation resulting therefrom. The Aggrieved Party may
          participate, at its expense, in the defense of such claim or
          litigation provided that the Indemnifying Party shall direct and
          control the defense of such claim or litigation.  The Indemnifying
          Party shall not, in the defense of such claim or any litigation
          resulting therefrom, consent to entry of any judgment, except
          with the written consent of the Aggrieved Party, or enter into any
          settlement, except with the written consent o the Aggrieved
          Party, which does not include as an unconditional term thereof
          the giving by the claimant or the plaintiff to the Aggrieved Party
          of a release from all liability in respect of such claim or
          litigation.

          (b)  If the Indemnifying Party shall not assume the defense of
          any such claim or litigation resulting therefrom, the Aggrieved
          Party may defend against such claim or litigation in such manner
          as it may deem appropriate and, unless the Indemnifying Party
          shall deposit with the Aggrieved Party a sum equivalent to the
          total amount demanded in such claim or litigation, or shall
          deliver to the Aggrieved Party a surety bond in form and
          substance reasonably satisfactory to the Aggrieved Party, the
          Aggrieved Party may settle such claim or litigation on such
          terms as it may deem appropriate, and the Indemnifying Party
          shall promptly reimburse the Aggrieved Party for the amount of
          all reasonable expenses, legal or otherwise, incurred by the
          Aggrieved Party in connection with the defense against or
          settlement of such claims or litigation.  If no settlement of such
          claim or litigation is made, the Indemnifying Party shall
          promptly reimburse the Aggrieved Party for the amount of any
          judgment rendered with respect to such claim or in such
          litigation and of all reasonable expenses, legal or otherwise,
          incurred by the Aggrieved Party in the defense against such
          claim or litigation.

10.06     (a)  Insurance Coverage.  Each party shall purchase and maintain
          insurance at its own expense to cover liabilities that it may incur
          in the testing, manufacture, distribution, sale or use of the
          Product.  Each party agrees to provide the minimum amounts and
          types of insurance, to protect its interests,  as follows, which
          may include self insurance :  

          (i)  Commercial General Liability Insurance with the following
               minimum limits of liability:
                  General Aggregate                       $   *
                  Personal and Advertising Injury             *
                  Each Occurrence                             *

          (ii) Insurance covering Product Liability/Clinical Studies Liability
               in amounts not less than: 
                  General Aggregate                       $   *
                  Each Occurrence                             *

<PAGE>          
          In the event that any such policies are on a claims made basis,
          coverage shall be maintained for a period of at least five years
          after the termination of this Agreement. Each party shall furnish
          to the other certificates of insurance, evidencing such insurance
          and naming the other party as a co-insured, except for limits
          covered under the self-insurance programs of either party.

     (b)  MM shall, in addition, include IMMU as an additional named
          insured on its policies of product liability insurance covering the
          Product and on its general comprehensive liability insurance
          covering the sale and distribution of the Product in the Territory,
          cause such policies to provide that they shall not be cancelled by
          the insurer without thirty (30) days prior notice therof to IMMU,
          and, upon IMMU's request,  MM shall furnish IMMU with a
          certificate of insurance evidencing such coverage.


                    ARTICLE 11
                         
         PATENT AND TRADEMARK INFRINGEMENT

11.01          Patents.  IMMU warrants and represents that is has no
          knowledge of the existence of any patent in a country of the
          Territory owned or controlled by anyone other than IMMU,
          which covers the Product or would prevent MM or IMMU from
          making, using or selling the Product in the Territory or would
          prevent MM and IMMU from promoting or detailing the Product
          in the Territory.

11.02          Infringement of IMMU Rights.  Each party shall promptly notify
          the other upon its becoming aware of any actual or suspected
          infringement by a third party of a patent or trademark owned by
          IMMU covering or identifying the Product in the Territory. 
          IMMU and MM shall confer on the desirability of initiating
          action against such third party and, if warranted in the reasonable
          opinion of IMMU, IMMU shall promptly take such action,
          including the initiation of legal proceedings, as is required to
          restrain or otherwise prevent such infringement.  IMMU shall
          have the right to retain any and all amounts recovered from such
          third party as a result of any action which it may bring.

11.03          Infringement of Third Party Rights.  In the event that a third
          party at any time provides written notice of a claim to, or brings
          an action, suit or proceeding against, either party or any of their
          respective Affiliates, claiming infringement of its patent or
          trademark rights or unauthorized use or misappropriation of its
          technology, based upon an assertion or claim arising out of the
          manufacture, use and/or sale of Product in the Territory, such
          party shall promptly notify the other party of the claim or the
          commencement of such action, suit or processing, enclosing a
          copy of the claims and/or all papers served.  Each party will
          make available to the other party its advice and counsel
          regarding the technical merits of any such claim. IMMU shall
          undertake, at its expense, the defense of any such action, suit or
          proceeding and shall manage and control the defense of such
          action and its settlement.  If as a result of any such action, suit
          or proceeding, MM or any Affiliate, in order to sell the Product in
          any country in the Territory, becomes obligated under an
<PAGE>          
          agreement or settlement, to make any payments to one or more
          parties to obtain a license or similar right in the absence of which
          the Product could not lawfully be made, used or sold in a country
          in the Territory, then from and after the date of imposition of
          such payments: (i) to the extent that the purchase price of the
          Product to MM under Section 7.01 is then being determined as
          a percentage of the Net Selling Price Per Vial, such payments
          shall be properly chargeable against the calculation of the Net
          Selling Price Per Vial as calculated under Section 1.13, and (ii)
          to the extent that the purchase price of the Product to MM under
          Section 7.01 is then being determined only on the basis of a fixed
          price per vial,    *    of such payments, determined
          on a per vial basis, shall be properly chargeable against the
          purchase price of the Product to MM.
                         
                         
                    ARTICLE 12
                         
                 GROSS INEQUITIES

12.01          Gross Inequities.  It is the intent of the parties hereto that 
          they shall mutually benefit from the terms,conditions and provisions
          of this Agreement, and in the event that either party shall suffer
          a gross inequity resulting from such terms, conditions or
          provisions, or from a substantial change in circumstances or
          conditions, the parties shall negotiate in good faith to resolve or
          remove such inequity.  It is mutually agreed, however, that
          nothing herein shall be construed to relieve either party of any of
          its obligations under this Agreement.  Other than as to such gross
          inequities, neither party shall assert or cause to be asserted in
          any suit, action, proceeding or other adjudication that any of the
          terms, conditions, or provisions of this Agreement are or will be
          unenforceable, unjust, unreasonable, preferential or prejudicial,
          or otherwise in violation of any provision of any statute or
          applicable rule thereof. 


                    ARTICLE 13
                         
               TERM AND TERMINATION

13.01          Term.  This Agreement shall commence on the Effective Date
          and, except as provided below in this Article 13, shall extend
          through the fifth anniversary of the First Distribution Date (the
          "Initial Term").  Thereafter, the Agreement may be renewed for
          successive two (2) year periods at the sole discretion of IMMU,
          by notice given to MM at least one hundred eighty (180) days
          prior to the beginning of any such additional period.  (The Initial
          Term and all such successive periods, if any, shall collectively be
          known as the "term of this Agreement")

13.02          Mutual Termination Rights.  Either party shall have the right
          to terminate this Agreement: 

               (i)  upon sixty (60) days prior notice to the other in
          the event that the other shall commit any material breach of its
          obligations hereunder and shall fail to remedy the same within
          forty-five (45) after being called upon in writing to do so; or 

<PAGE>
               (ii) to the extent permitted by law, upon notice to the
          other in the event the other party suspends its business, becomes
          insolvent, fails generally to pay its debts as they mature, files a
          voluntary petition or any answer admitting the material
          allegations of, or consents to, an involuntary petition pursuant to
          or purporting to be pursuant to any reorganization or insolvency
          law of any jurisdiction, makes an assignment for the benefit of
          creditors, or applies for or consents to the appointment of a
          receiver or trustee of a substantial party of its property; or 

               (iii)     following a "change of control" of the other party,
          if immediately following such change of control the Person or
          Persons acquiring control of such other party are competitors of
          the terminating party.  For purposes of this clause, a "competitor"
          means any Person whose product line includes an in vivo 
          diagnostic imaging agent for colorectal, breast or lung cancer
          indications,  and a "change of control" shall be deemed to have
          occurred with respect to a party to this Agreement if (a) a Person
          or group of Persons acting in concert acquires more than 50% of
          the voting power of all outstanding voting securities of such
          party , (b) such party engages in a corporate transaction
          (including a merger, consolidation, sale of assets or other
          corporate reorganization) which upon its consummation results
          in the shareholders of such party immediately prior to such
          transaction owning less than 50% of the outstanding stock of the
          resulting entity, or (c) as to MM, its ultimate corporate parent
          ceases to own, directly or indirectly, at least 50% of the
          outstanding common stock of MM or ceases to have the right to
          designate at least one half of the board of directors of MM. 

13.03          Competitive Product.  In the event that MM develops another in
          vivo  diagnostic imaging product for colorectal, breast or lung
          cancer indications which is not monoclonal based, MM shall
          notify IMMU, simultaneously with its first submission of a
          product registration filing in any Major Market, that such filing
          has been made.  After the delivery of such notice, MM shall have
          the right to elect to terminate this Agreement upon twelve (12)
          months prior notice, and IMMU shall have the right to elect to
          terminate this Agreement upon one (1) months prior notice. 

13.04          Market Diligence.  Without limiting its right to termination
          for material breach as contemplated by Section 13.02, IMMU shall
          have the right to terminate this Agreement upon sixty (60) days
          prior notice to MM if: (i) MM exercises its right under Section
          2.03 to reduce the Territory with respect to any Major Market;
          (ii) MM's projected unit sales of the Product as set forth in
          Schedule C hereto for the calendar year 1997 is not achieved in
          such year;  or (iii) if MM has materially failed to fulfill the
          objectives of its Annual Marketing Plan for two successive
          annual periods. 

13.05          Lack of Product Registration.  Without limiting its right to
          termination for material breach as contemplated by Section 13.02,
          MM shall have the right to terminate this Agreement upon sixty (60)
          days prior notice to IMMU given at any time between January 1, 1997
          and February 28, 1997, if by December 31, 1996, IMMU shall not have
          obtained a product registration for the marketing of the Product in 
          at least one country within the Territory.

<PAGE>
13.06     (a)  Rights and Obligations Upon Termination. Upon any termination
          of this Agreement, MM shall promptly return to IMMU or its
          designee or otherwise cause to be transferred to IMMU all
          product registrations, permits and licenses and files related to
          such governmental authorizations relating to the Product and all
          Confidential Information of IMMU, and MM shall have no
          further rights thereto.  To the extent transfer or assignment of
          approvals, licenses or rights is not permitted under local law,
          MM shall cooperate in the cancellation of the same and in the
          reissuance thereof to IMMU or its designee.  MM shall not after
          the termination of this Agreement use in the Territory any name
          or mark confusingly similar to any Mark of IMMU's in
          connection with the sale of any product by MM. 

      (b) Termination of this Agreement in whole or in part shall not
          relieve the parties of any amounts owing between them, nor shall
          it relieve the parties of their obligations with respect to the
          Product distributed hereunder, or with respect to limiting
          disclosure and use of Confidential Information.  Upon
          termination of this Agreement: (i) as a result of IMMU's breach,
          MM shall have the right either to sell its then inventory of the
          Product during such period as may be required to liquidate such
          inventory in an orderly manner or to return such inventory to
          IMMU for a price per vial equal to the greater of the most recent
          Net Selling Price Per Vial or the landed cost to MM of such vial,
          and (ii) for any reason other than IMMU's breach, IMMU shall
          have the right to repurchase all or any portion of MM's inventory
          of Product, at MM's landed cost thereof; and with respect to any
          quantities not repurchased by IMMU, MM shall have the right
          to sell Product from such quantities, in the ordinary course of
          business, for a period of three (3) months following termination. 
          The provisions of Article 10 shall survive any termination of this
          Agreement.
                         
                         
                    ARTICLE 14
                         
                  CONFIDENTIALITY

14.01          Confidentiality.  For a period of ten (10) years from the
          Effective Date of this Agreement or five (5) years from the
          termination hereof, whichever occurs later:

               (i)  each party shall refrain from the use of
          Confidential Information furnished by the other party for any
          purpose inconsistent with this Agreement; and

               (ii) each party shall treat Confidential Information
          furnished by the other party as if it were its own proprietary
          information and shall not disclose it to any third party other than
          its Affiliates or consultants without the prior written consent of
          the other party who furnished such information; provided,
          however, that such Confidential Information may be disclosed if
          in the reasonable opinion of recipient's counsel, such disclosure is
          necessary to comply with the requirements of any law, governmental
          order (including a court order), regulation or Internal Revenue
          Service request.  Recipient shall notify and consult with the
          disclosing party prior to such disclosure of information.

<PAGE>
14.02          Advertising and Publicity. Subject to Section 14.03 and except
          for such disclosures as are deemed necessary in IMMU's or
          MM's, as the case may be, reasonable judgment to comply with
          applicable law (such as, by way of example but not limitation,
          the securities laws of the United States), neither IMMU nor MM
          nor anyone acting on its behalf will make any publicly
          disseminated oral or written disclosure relating or referring to, 
          or use any advertising or publicity which relates or makes reference
          to, the other party, this Agreement or the terms hereof, without
          in each case having received the other party's prior approval
          (which approval will not be unreasonably withheld or delayed);
          each party will respond promptly to a disclosure request, but in
          any event not later than ten (10) business days from receipt of
          such a request.  The foregoing restriction shall not apply to any
          information which is contained in any previously issued press
          release or other disclosure that has been approved by the other
          party or that is otherwise indicated on Product labels, packaging,
          brochures or similar promotional material.

14.03          Disclosure Required by Law.  In the event that IMMU or MM
          shall be required to make disclosure of the other's Confidential
          Information as a result of the issuance of a court order or other
          government process, the party subject to such requirement
          promptly, but in not event more than forty-eight (48) hours after
          learning of such court order or other government process, shall
          notify the other party and, at the other party's expense, the party
          subject to such requirements shall: (a) take all reasonably
          necessary steps requested by the other party to defend against the
          enforcement of such court order or other government process,
          and, (b) permit the other party to intervene and participate with
          counsel of its choice in any proceeding relating to the
          enforcement thereof.

14.04          Manuscripts.  MM shall use its best efforts to submit to IMMU
          for review at least thirty (30) days prior to submission for
          publication all manuscripts relating to the Product, its use, or
          the result of clinical trials written by MM's employees or by
          collaborators or clinical investigators participating in studies
          funded in whole or in party by MM.  If IMMU has not
          disapproved of the publication of the manuscript within thirty
          (30) days after receipt, the author may submit the manuscript for
          publication, and IMMU shall have no further right to comment. 
          Approval of any such manuscript shall not be reasonably
          withheld or delayed.  However, IMMU reserves the right to have
          deleted from the manuscript any material which may be
          reasonably considered Confidential Information.
                         
                    
                    ARTICLE 15
                         
                   MISCELLANEOUS


15.01          Governing Law; Choice of Forum.  The validity of this
          Agreement, the construction and enforcement of its terms, and the
          interpretation of the rights and duties of the parties hereunder
          will be governed by the laws of the State of New York, USA,
<PAGE>
          excluding those laws that relate to the choice of law and
          excluding the United Nations Convention on Contracts for the
          International Sale of Goods. The exclusive jurisdiction and
          venue for any disputes arising out of or in connection with this
          Agreement will be an appropriate federal court located in the
          Southern District of NewYork, and each party hereby consents
          to personal jurisdiction in such court and consents to service of
          process by means of certified or registered mail, return receipt
          requested. 

15.02          Independent Contractor.  MM will perform all of its activities
          hereunder as an independent contractor, and nothing contained
          in this Agreement shall be deemed to create any association,
          partnership, joint venture, or relationship of principal and agent
          between the parties to this Agreement or any of their respective
          Affiliates, or to provide either party with the right, power or
          authority, whether express or implied, to create any such duty or
          obligation on behalf of the other party.  No employee or
          representative of a party shall have any authority to bind or
          obligate the other party to this Agreement for any sum or in any
          manner whatsoever, or to create or impose any contractual or
          other liability on the other party without said party's authorized
          written approval.

15.03          Accounting Audits.  Each party shall maintain books of account
          relating to its expenditures pursuant to this Agreement, and in the
          case of MM, Gross Sales, Net Sales and Net Selling Price per
          Vial in accordance with U.S. generally accepted accounting
          standards with appropriate controls to insure that transactions are
          properly recorded.  Each party shall have the right, at it own
          expense, to have an independent certified public accountant of its
          own selection, reasonably acceptable to the other, examine at a
          time reasonably acceptable to the other, during normal business
          hours but not more than once each calendar year, the relevant
          books and records of account of other, to determine whether
          appropriate accounting has been made under Sections 3.08, 5.04
          and Article 7 hereof hereunder.  Such independent certified
          accountant shall treat as confidential and shall not disclose to the
          party engaging such accountant any information other than that
          which is relevant to the rights of the engaging party hereunder or
          the performance by the other party of its obligations hereunder.
          If such independent certified public accountant shall determine
          that the amounts due and owing by MM to IMMU during any
          calendar year exceed amounts actually paid by five percent (5%)
          or more, then MM shall, in addition to promptly paying such
          shortfall, reimburse IMMU for the fees and expenses of such
          accountants.  In the event of a dispute between the independent
          certified public accountants of MM and IMMU with respect to
          any matter called for by this Agreement, the parties shall select
          a third independent public accounting firm to arbitrate the
          dispute, provided, that such firm shall have the authority only to
          select from among the positions of the original two firms that
          position which it deems most accurate.  The fees of such third
          firm shall be borne by the party whose position is not approved
          of by such arbitrator.

<PAGE>
15.04          Interest Due on Late Payments.  If any amount payable by MM
          to IMMU hereunder is not paid when due, then without limiting
          any other rights which IMMU may have as a result of such late
          payment, the amount unpaid shall bear interest until paid at a rate
          per annum equal to the prime rate published and as changed from
          time to time by Citibank, N.A. New York, New York (as
          reported in The Wall Street Journal) plus one percent (1%), with
          such interest to be paid on demand together with all costs
          incurred by IMMU to collect the amounts due hereunder,
          including but not limited to reasonable attorneys fees and
          disbursements.

15.05          Taxes.  Each party shall bear all taxes imposed on it as a 
          result of the performance by such party under this Agreement
          including, but not limited to, any sales tax, any tax on or
          measured by any payment required to be made hereunder, any
          registration tax, or any tax imposed with respect to the granting
          of licenses or other rights hereunder.  The parties shall cooperate
          fully with each other in obtaining and filing all requisite
          certificates and documents with the appropriate authorities and
          shall take such further action as may reasonably be necessary to
          avoid the deduction of any withholding or similar taxes from any
          remittance of funds by MM to IMMU hereunder. 

15.06          Employees.  Neither party shall have any responsibility for the 
          hiring, firing or compensation of the other party's employees or
          for any employee benefits of the other party's employees.

15.07          Assignment.  This Agreement shall be binding upon, and shall
          inure to the benefit of successors to a party hereto, but shall not
          otherwise be assignable without the prior written consent of both
          parties, except to the successor or assignee of all or a majority
          interest in either party's business relating to the licensed
          Product.  In the event all or a majority interest is assigned or
          transferred, each party shall notify the other prior to such
          assignment or transfer.

15.08          Notices.  Any notice required or permitted to be made or given
          hereunder shall (except as otherwise expressly provided herein)
          be in writing and shall be made or given to the other party by
          personal in-hand delivery; by telecopier or telex communication;
          by first-class mail, postage prepaid; or by air courier to the
          mailing or telecopier or telex numbers set forth below:

                    Mallinckrodt Medical B.V.
                    Westerduinweg 3
                    PO Box 3
                    1755 ZG Petten
                    Holland
                    Attention:  General Manager, Vice President
                    Telecopier No. (011) 31-2246-3566

                    Immunomedics, Inc.
                    300 American Road
                    Morris Plains, NJ  07950
                    Attention:  Chief Executive Officer
                    Telecopier No. (201) 605-8282

<PAGE>
          or to such other address or telecopier or telex numbers as either
          party shall designate by notice, similarly given, to the other
          party.  Notices shall be deemed to have been sufficiently made
          or given: (i) if by personal in-hand delivery, or by telecopier or
          telex with confirmed transmissions, when performed; (ii) if
          mailed, ten (10) days after being deposited in the mail, postage
          prepaid; or (iii) by air courier, three (3) days after delivery to
          the air courier company.

15.09          Force Majeure.  In the event that either party is prevented 
          from performing or is unable to perform any of its obligations under
          this Agreement due to any act of God, fire, casualty, flood, war,
          strike, lockout, failure of public utilities, injunction or any act,
          exercise, assertion or requirement of governmental authority,
          including any governmental law, order regulation permanently
          or temporarily prohibiting or reducing the level of research,
          development or production work hereunder or the manufacture,
          use or sale of Product, epidemic, destruction of production
          facilitates, riots, insurrection, inability to procure or use
          materials, labor, equipment, transportation or energy sufficient
          to meet experimentation or manufacturing needs; or any other
          cause beyond the reasonable control of the party invoking this
          Section 15.09 provided such party shall have used its best efforts
          to avoid such occurrence; such party shall give notice to the
          other party in writing promptly, and thereupon the affected
          party's performance shall be excused and the time for
          performance shall be extended for the period of delay or inability
          to perform due to such occurrence.

15.10          Waiver.  The waiver by either party of a breach or a default of
          any provision of this Agreement by the other party shall not be
          construed as a waiver of any succeeding breach of the same or
          any other provision, nor shall and delay or omission on the part
          of either party to exercise or avail itself of any right, power or
          privilege that it has or may have hereunder operate as a waiver
          of any right, power or privilege by such Party.

15.11          Partial Invalidity.  The parties to this Agreement desire and
          intend that the terms and conditions of this Agreement be
          enforced to the fullest extent permissible under the laws and
          public policies applied in each jurisdiction where enforcement is
          sought.  If any particular term or condition of this Agreement is
          adjudicated , or becomes by operation of law, invalid or
          unenforceable, this Agreement will be deemed amended to delete
          the portion which is adjudicated, or which becomes by operation
          of law, invalid or unenforceable, provided, however, that where
          possible, a particular term or condition will be reduced to the
          extent necessary to permit the remainder of the particular term or
          condition to be enforced, the deletion or reduction to apply only
          with respect to the operation of the term or condition and the
          remainder of this Agreement to remain in full force and effect. 
          A deletion or reduction of any term or condition will apply only
          with respect to the operation of that term or condition in the
          particular jurisdiction in which such adjudication is made or
          becomes by operation of law, invalid or unenforceable. 

15.12          Captions.  All captions herein are for convenience only and
          shall not be interpreted as having any substantive meaning.

<PAGE>
15.13          Integration.  This Agreement constitutes the entire agreement
          between the parties hereto relating to the subject matter hereof
          and supersedes all prior communications and understandings,
          written or oral, with respect to this subject. This Agreement may
          be amended only by means of an instrument executed in writing
          by properly authorized representatives of IMMU and MM.

15.14          Counterparts; English language. This Agreement may be
          executed in any number of counterparts, each of which shall be
          deemed an original but all of which together shall constitute one
          and the same instrument. This Agreement is entered into in the
          English language.  In the event of any dispute concerning the
          construction or meaning of this Agreement, reference shall be
          made only to this Agreement as written in English and not to any
          translation hereof into any other language, and this English
          language version shall be controlling for all purposes. 


     IN WITNESS WHEREOF, Mallinckrodt Medical B.V. and
Immunomedics, Inc. have caused this Agreement to be duly executed by their
authorized representatives, in duplicate on the dates written herein below.

Attest:                                 Mallinckrodt Medical B.V.

By ____________________________          By ____________________________



                                         Date __________________________



Attest:                                 Immunomedics, Inc.

By ____________________________          By ____________________________



                                         Date __________________________

<PAGE>
                    SCHEDULE A
                         
                     TERRITORY

Austria                            
Belgium                            
Bulgaria
Czech Republic
Denmark
Estonia                            
Finland                            
France                             
Germany                            
Greece                             
Hungary
Ireland                            
Italy                              
Latvia
Lithuania
Luxembourg                         
Netherlands                        
Norway                             
Poland
Portugal                           
Romania
Russia
Slovakia
Spain                              
Sweden                             
Switzerland
Ukraine
United Kingdom
Other territories comprising the former Soviet Union



The term "Territory" shall be deemed to include any new or different 
countries resulting from changes in the name or political composition 
of the above listed countries.

<PAGE>
                    
                    SCHEDULE B
                         
              MARKETING EXPENDITURES

            U.S. Dollars (in thousands)
                         
                         
                1995    1996    1997    1998    1999
Promotion         *       *       *       *       *
Marketing         *       *       *       *       *
Selling           *       *       *       *       * 
Training          *       *       *       *       *  
Regulatory        *       *       *       *       *
Others            *       *       *       *       *
TOTAL         $   *       *       *       *       *


Promotion expenditures to include, among other items, case book, oncology
update, product reprints, congresses, and computer aided education programs.

Marketing expense to comprise marketing resources (team) exclusively
allocated to CEA-Scan  and expenses related thereto.

Selling expenditures to include, among other items, sales force meetings,
local symposia, and local market incentive programs, in each case relating
exclusively to CEA-Scan.

Regulatory expenses to comprise resources for registration and
pricing/reimbursement filings, including any special local market
requirements which could include specific market expertise
(i.e. clinical expert reports, etc.).

<PAGE>
                    
                    SCHEDULE C
                         
               FORECASTED UNIT SALES
                         



FORECAST


YEAR       1995    1996    1997    1998    1999
UNITS        *       *       *       *       *

<PAGE>
                    SCHEDULE D
                         
       MM AFFILIATES  AND RECOGNIZED AGENTS
                         

Austria
B.S.M. Diagnostics GmbH, Wien

Belgium
Mallinckrodt Medical S.A./N.V., Brussels

Bulgaria
Electron ABT. STE., Sofia

Czech Republic
KBC Spol S.R.O., Rokycany

Denmark
Dandiag ApS, Copenhagen

Estonia
Tamro Cooperation, Vantaa

Finland
Tamro Cooperation, Vantaa

France
Mallinckrodt Medical S. A., Evry Lisses

Germany
Mallinckrodt Radiopharma GmbH, Hennef

Greece
Biomedica Ltd., Athens

Hungary
FZINTA Trading Co., Ltd., Budapest

Ireland
Perlamar Ltd., Dublin

Italy
Byk-Gulden SpA, Milan

Latvia
No official agent

Lithuania
No official agent

Luxembourg
Mallinckrodt Medical S.A./N.V., Brussels

Netherlands
Mallinckrodt Medical B.V., Petten

Norway
Laboral AS, Oslo

<PAGE>
Poland
No official agent

Portugal
Mallinckrodt Iberica S.A., Madrid

Romania
Rombel medical S.A., Bucharest

Russia
No official agent

Slovak Republic
Izomedact, Bratislava

Spain
Mallinckrodt Iberica S.A., Madrid

Sweden
Diagnostic Imaging, Linkoping

Switzerland
Mallinckrodt Medical AG, Zurich

Ukraine
No official agent

United Kingdom
Mallinckrodt Medical (UK) Ltd., Northhamton


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