Document:

January 6, 1999

                    [Coverletter of Cortez Diagnostics, Inc]

Pretory
182 Rue de Pyranees BP12
Paris Cedex 20, 75965
France

                              Distributor Agreement

We, Cortrez Diagnostics, Inc., hereafter referred to as Cortez, hereby certify
that Pretory, or the above mentioned address, is our exclusive distributor of
the Drugs of Abuse Rapid tests in France. The exclusivity right will remain in
place for six months from the date of this contract and after six months the
distributor's activities will be evaluated. If the sales volume for the first
six months is satisfactory the contract will be renewed for a period of six
months. The distributor's activities will be evaluated at the beginning of each
subsequent six-month periods and the parties will agree in writing for the
volume of sales for the following six-month period and renew the contract
accordingly.

Pretory is authorized with the right to sell and register the products, supply
technical services on behalf of Cortez, exporting outside of the United States.
Pretory agrees not to distribute similar rapid tests from Cortez's competitors
during the period specified by this agreement, except for tests that are not
available from the Cortez product list. Pretory is authorized to use our
business and brand name to advertise our products via mass media.

In cases where individual buyers demand to buy directly from Cortez, Cortez will
inform Pretory about such a proposal. Cortez will allow Pretory to negotiate the
selling price - this is in order to keep a consistent pricing policy - and the
margin between Pretory's cost and the selling price will be split 50-50 with
Cortez. Cortez will not sell and ship Cortez Drugs of Abuse test directly to any
other customer located in France. However, Cortez will not be held responsible
for any OEM buyers and distributors worldwide who might intend to sell the same
products under their own company name in France.

Cortez accepts to carry out the supply of tests for Pretory for upcoming orders.
Pretory will be fully supported and promptly supplied by Cortez for as long as
the signed contract is valid. The prices quoted to Pretory will remain for 6
months from the above date.

SAMPLE POLICY; Pretory is expected to pay for the samples (20% discount) and pay
for the freight. PAYMENT POLICY: Payment terms will be cash in advance by wire
transfer, check or confirmed, irrevocable, and sight letter of credit. Pretory
must pay the L/C fees for their bank and Cortez's bank. The quoted prices are
based on the payment method of wire transfer and do not include L/C costs. These
agreements must be determined before any upcoming order pro forma will be
prepared.

Initials  /s/ P.SH                  /s/ JG
          ------------              ----------------
          Paul Shaw                 Jacques Gaussens

                                 Page 33

SHIPMENT: Approximately two days to 2 weeks after receipt of firm order
depending upon the diversity and the volume of the order. This also depends on
the payment plan. If the delivery time needed is longer than 2 weeks, then
Cortez will inform the distributor about the expected delivery date.

WARRANTY: Cortez warrants that diagnostics supplied to the distributor are free
from defects In material, design and workmanship. All diagnostics shall show
their expiration date on the label. The stated warranty does not apply in the
event of improper storage and/or handling of diagnostics or in other
circumstances beyond the control of Cortez. In the event that a shipment of such
diagnostics from Cortez is confirmed by Pretory as defective with respect to
workmanship or quality and if written notice thereof is duly given to Cortez,
Pretory shall at Cortez's request and cost return or destroy the products in
question, whereupon Cortez shall at its discretion, either reimburse any amounts
paid to Cortez as purchase price for the products in question or deliver an
equivalent amount of such products to Pretory. Any further warranties or
remedies whether express or implied, including without limitation - any warranty
of merchantability or fitness for any particular purpose with respect to
products or any claim for loss of profit or other damages resulting from
defective products are expressly excluded. The risk of expiry shall be borne
exclusively by the distributor.

LIABILITY: Cortez shall be liable for only the cost of the defective products
paid to Cortez. The distributor will accept any other liability. The distributor
will indemnify and hold Cortez harmless against any and all claims, Lawsuits,
proceedings, recoveries, and damages arising out of, based on, or caused by
defects in material or workmanship of the products.

The faxed copy of this document is legitimate and legal. It can be renewed
before the expiration date.

Signed by:

/s/ Paul Shaw                                          /s/ Jacques Gaussens
---------------------                                  -------------------------
Paul Shaw                                              Jacques Gaussens
Marketing Manager                                      President

This certificate expires 12 months from the date notarized.
State of California/County of Los Angeles

Subscribed and sworn to before me this ____ day of __________ month ________year

      _____________________________

                                Page 34Distribution-Contract

                                     between

                                 SECURETEC GMBH
                            Rosenheimer Landstr. 129
                                 85521 Ottobrunn
                                     Germany

                     hereinafter referred to as ,,SECURETEC"

                                       and

                                 SOCIETE PRETORY
                              182, Rue des Pyrenees
                                   75020 Paris
                                     France

                      hereinafter referred to as ,,PRETORY"

                  hereinafter jointly referred to as ,,parties"

Version 24.06.1997

                                 Page 35

                                                                 /s/ [ILLEGIBLE]

PREAMBLE

SECURETEC LTD. develops, maufactures, distributes and markets products in the
field of security and hazardous and/or illegal substance detection.

PRETORY is distributor in the same field with personnel experienced in the
promotion distribution and sale of similar products and services.

Both parties desire to cooperate in the marketing sales and distribution of
Securetec's products as defined in Annex A (products).

1     CONDITIONS OF THIS AGREEMENT
      (products, territories, prices)

1.1   The parties conclude this agreement for a term of 24 months as of the date
      of its signature.

1.2   During this period of time, pretory shall have exclusive rights for the
      marketing, sale and distribution of Securetec's products (Annex A) in the
      territories and market segments enumerated in Annex B.

1.3   Securetec shall sell to Pretory the ,,products" according to the price
      list in Annex C (pricing).

1.4   Pretory's sales projections for the first two half year periods and the
      second year of cooperation, starting with the date of signature of this
      contract, are described in Annex D Pretory will provide Securetec at least
      4 weeks before the end of each year of cooperation with an update of these
      sales projections for the next two half-year periods.

1.5   This agreement shall remain in force for a period of 12 months after the
      expiration of the current contract, provided that sales are in accordance
      with the sales projections agreed upon every 12 months. Such renewal shall
      have to be made in writing at least thirty (30) days prior to the
      expiration of this agreement.

1.6   Sales are reviewed on a half-year basis. Securetec shall have the right to
      either cancel the exclusivity provision of this contract or terminate this
      agreement within a 3 months period at each half year review if sales for
      any given half year period are more than 25% below the projected sales in
      Annex D.

1.7   Securetec will not be authorized to sell directly the ,,products" in the
      ,,territories" given to Pretory for the duration of the agreement, if
      sales activities of pretory are obvious and successfull according to
      clause 1.6.

                                                                               3

                                                                 /s/ [ILLEGIBLE]

1.8   Price adjustments in the delivery price due to changes in market demands
      or variation in production costs shall be implemented by mutual agreement
      within the first month of each year based on contract anniversary date.

1.9   Securetec has the right to vary/change products according to demands of
      its production.

1.10  Pretory is neither allowed to manufacture or distribute competitive
      products not to let competitive products be manufactured or distributed by
      other parties nor support or contribute to the manufacturing or
      distribution process.

                                Page 36

2     BUSINESS PLAN

2.1   Pretory will supply Securetec before the date of signature of this
      contract with its sales projections (Annex D) as well as a detailed
      business plan (Annex E), being both part of this agreement.

2.2   This business plan shall include:

      *     marketing strategies for the private and the official market.
      *     a reasonable market price for different market segments
      *     a list of sub-agents and dealers including a status report on each
            of them.

2.3   Securetec accept both; the Annexes D (sales projection) and E (marketing
      plan) as starting points for further marketing activities. Securetec and
      Pretory continues to work on them in the following business meetings;
      which should be every 3 months.

2.5   Before each quarter of the calendar year Securetec actualises its
      production dates and numbers for the following quarter. Therefore Pretory
      shall transmit every three months which amounts of products they will need
      for the next quarter. Pretory is oblidged to purchase the prognosed
      quantity for the immediate following quarter. Especially for quantities
      exceeding 5000 pieces Securetec has to know this at least four (4) weeks
      before the end of each quarter, which means before the end of November,
      Februar, May and August. Otherwise the terms of delivery agreed in Annex C
      can not be hold.

3     PROMOTION OF PRODUCTS

3.1   Pretory shall bear all costs of its own personnel, marketing, canvassing
      and expenditures for advertising.

3.2   Pretory shall provide information on its market development activities to
      Securetec. Any kind of information about competitors and their products,
      new products, market trends, important exhibitions and congresses. Vice
      versa Securetec shall act the same way.

                                                                               4

                                                                 /s/ [ILLEGIBLE]

                                Page 37

3.3   Pretory shall promote develoment including the establishment of customer
      contacts, major end users as per the Marketing plan.

3.4   All marketing material shall have to be approved by Securetec prior to its
      distribution.

3.5   Pretory shall be entitled to conclude and execute sales contracts with end
      users, resale agents and commissioned sales agents.

3.6   Pretory will pass all potential agent contracts to Securetec for review
      and approval.

3.7   Pretory will establish freely its resale prices, keeping them within a
      competitive way.

3.8   SECURETEC will, upon Pretory's request supply free a reasonable quantity
      of all documentation material available in english or preferably in French
      and will actualize material when printed for its own use.

3.9   Pretory will translate such material at its own cost it necessary and
      submit it to the approval of Securetec.

3.10  Securetec will facilitate the marketing of its products by Pretory in
      making available all pertinent information concerning the training of
      personell using the products, the marketing, the promotional material
      used, local sales strategies and relevant sales statistics and local
      specific usage of the products as well as market segments in Germany and
      other countries where SECURETEC products are marketed. Any and all
      informations which will facilitate the sale of Securetec supplied
      products. Press reviews, public relations and advertising activities and
      material available as well as support for exhibitions.

4     DELIVERY CONDITIONS

4.1   Product orders shall be placed for a minimum quantity per order as
      mentioned in Annex C as well, large quantities orders, will be transmitted
      according to a schedule agreed upon in the same Annex C.

4.2   Product specifications are described in Annex F. If product specifications
      are outside the specified range, Securetec shall provide free (CIF Paris)
      replacement within 60 days. If Securetec is unable to deliver products
      according to the specifications as mentioned above and/or the guarantees
      and schedules of deliveries agreed by Securetec in the confirmation of the
      specific order from Pretory to Securetec, Pretory shall have the right to
      terminate the agreement within 60 days.

                                                                               5

                                                                 /s/ [ILLEGIBLE]

                                Page 38

5     GUARANTEES

5.1   Securetec guarantees, that product qualities are within the specified
      range described in Annex F (Specifications).

5.2   Pretory will not be authorized to supply any other guarantee besides the
      ones described herein nor engage the responsibility of Securetec with
      regards to technical specifities not written on the printed material
      approved by Securetec.

5.3   Pretory will not be authorized to accept any order which is combined with
      a penalty for non-fulfilment of a contract if the delivery is in delay,
      without the consent of Securetec.

5.4   Pretory shall not assume any liability, obligation or responsibility with
      respect to any failure due to the manufacturing of the product.

5.5   Securetec and Pretory shall be responsible itselves for any claim for
      damage and/or litigation proceedings raised against it due to the use or
      the misuse of the product. Each party shall pay for and maintain insurance
      policies covering the risks.

6     STOCK

Pretory shall ensure stock levels sufficient to meet market requirements.

7     TERMINATION OF AGREEMENT

After the regular expiry or a premature termination of this agreement by
Pretory, a full and complete list of Pretory's customers for Securetec's
products will be supplied to Securetec to enable continuation of business
activities in the territory concerned.

8     CONFIDENTIALLY AGREEMENT

In addition to this agreement a non-disclosure contract between the above
parties has been concluded and will remain in force an additional 5 years beyond
the termination or expiration of this agreement.

9     PLACE OF JURISDICTION

Place of jurisdiction shall be Zurich. This agreement shall be governed by
German law.

                                 Page 39

                                                                 /s/ [ILLEGIBLE]

10    FINAL AGREEMENTS

10.1  Any supplement and/or amendment to this agreement shall only be valid if
      made in writing and signed by both parties.

10.2  This agreement does not establish a joint venture or an agency or legal
      representation relationship between the parties and does not give either
      party any right or authority to assume or create any express or implied
      obligation and/or responsibility on behalf of the other party nor may this
      agreement be construed in such a way except as provided for in item 3.5.

10.3  If any provision of this agreement is or is held to be illegal or to have
      become illegal, invalid, unenforceable or voidable for any reason, that
      provision will not affect the legality, validity or enforceability of the
      other provisions ot this agreement, and will be seperated from this
      agreement so that the remaining provisions remain in full force and
      effect.

10.4  Pretory is authorized to mention on its letterhead or the products and on
      promotional material that it is the exclusive distributor of Securetec's
      products (Annex A) in the territories and market segments agreed upon in
      Annex B.

10.5  The following Annexes, signed by both parties are integral parts of this
      agreement:

      * Annex A: Securetec's products

      * Annex B: Territories and market segments for exclusivity

      * Annex C: Pricing and delivery conditions

      * Annex D: Sales projections

      * Annex E: Marketing plan

      * Annex F: Product-specifications, Demands for transport and stocking.

      * Annex G: General terms and conditions

      * Annex H: Frontline

IN WITNESS WHEREOF, the parties have executed this Agreement as of the date set
forth below.

                                               /s/ [ILLEGIBLE]
------------------------------                 ---------------------------------
PRETORY                                        SECURETEC
SECURITE - COMMUNICATION                       "SECURITY TECHNOLOGY
                                               HAZARDOUS SUBSTANCE DETECTION
                                               LTD.

Date:         Societe PRETORY                  Date: 25.6.97
           182, rue des Pyrenees
               75020 PARIS
   Tel: 01 43 66 28 54 : Lignes Groupees
           Fax: 01-43 66 28 55

By Mr.                                         By Mr. Rudolf Zimmermann
Its President /s/ [ILLEGIBLE]                  Its Managing Director

                                                                               7

                                                                 /s/ [ILLEGIBLE]
                                 Page 40

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex A

Securetec products

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

o     The main product, produced by Securetec itself is the drug detection kit
      ,,Drugwipe". Its specifications are mentioned in Annex F.

o     The drug-test ,,ESA" is manufactured by the Test Technology Company
      Eisenach. Securetec has the right to sell this test in the countries in
      request, if the quantities (minimum 1.500 packages per year) are
      sufficient.

                                 Page 41

                                                                 /s/ [ILLEGIBLE]

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex B(1)

Territories and market segments

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

Territories for exclusivity:

Pretory shall have exclusive rights for the marketing, sale and distribution of
Securetec's product Drugwipe in the following countries:

                            o     France
                            o     Argentina

Territories for non-exclusivity:

Pretory is allowed to sell Securetec products non-exclusively in the following
countries. They have to inform Securetec about the marketing progress.

                            o     Switzerland
                            o     Belgium (except for traffic control)
                            o     Portugal
                            o     Saudi -Arabia
                            o     United Arab Emirates
                            o     Qatar
                            o     Oman
                            o     Syria
                            o     Jordania
                            o     Irak
                            o     Lebanon

In these countries (non-exclusive) ,once Pretory advices Securetec of a specific
market contact, Securitec will protect Pretory to the best of their ability by
not giving a price immediately to a direct demand from that country without
consulting Pretory.

                                Page 42
                                                                 /s/ [ILLEGIBLE]

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex B(2)

Territories and market segments

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

Market segments:

The exclusivity will be given for different market segments:

1. Private market, this means:

      o     pharmacies
      o     parents
      o     schools
      o     hospitals (drug-therapy, rehabilitation)
      o     companies (working-security)

2. Governement market

      o     customs
      o     police
      o     prisons
      o     army (sea, air and earth)

                                 Page 43

                                                                 /s/ [ILLEGIBLE]

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex C

Pricing and delivery conditions

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

1. Drugwipe:

Pricing:

<TABLE>
<CAPTION>
                ----------------------------------
                Pieces                    Price
                ----------------------------------
                <S>                       <C>
                 1.000 Pcs.               DM 10,50
                ----------------------------------
                 5.000 Pcs.               DM 9,50
                ----------------------------------
                10.000 Pcs.               DM 8,90
                ----------------------------------
                50.000 Pcs.               DM 8,50
                ----------------------------------
</TABLE>

o     For actual sellings more than 50.000 per year it will be negiciated
      separately.
o     All prices are net prices without taxes ex works Securetec.
o     Securetec provides full warranty for Drugwipe: one year, until the date
      printed on each cover foil

Terms of delivery:

o     Shipment costs are fully charged to the customer. We are pleased to
      announce shipment costs for your individual order on request. Support to
      your own logistics can be supplied be Securetec.

o     Schedule: <=  10.000 within 6 weeks
                > 10.000 within 3 months (part shipments are possible)

Terms of payment:

o     100 percent of the total value including transport costs within 45 days
      after shipment of the goods.

If once the term of payment isn't kept, it will be reduced to 14 days for the
following order.

2) ESA-CHEMICAL TEST

<TABLE>
<CAPTION>
        ------------------------------------------------------------------
        Product Name          Description
        ------------------------------------------------------------------
        <S>                   <C>
        ESATest ,,Cocaine"    Quick test for the determination of Cocaine
        ------------------------------------------------------------------
        ESATest ,,Opiates/    Quick test for the determination of Opiates
        Amphetamines"         (Heroin, Morphines) and Amphetamines
        ------------------------------------------------------------------
        ESATest ,,Cannabis"   Quick test for the determination of Cannabis
                              products (THC, Marihuana, Hashish)
        ------------------------------------------------------------------
        ESATest ,,LSD"        Quck test for the determination of
                              halucinogene substances, especially LSD
        ------------------------------------------------------------------
</TABLE>

Pricing:  1 - 100 packages:  36,00 DM   One package contents 10 test kits,
        101 - 500 packages   34,00 DM    minimum order quantity: 10 packages
          > 500 packages     32,00 DM

Minimum orders per year: 1.500 packages

                                 Page 44
                                                                 /s/ [ILLEGIBLE]

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex D

Sales projections

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

<TABLE>
<S>                                          <C>
o     With signing the contract              5.000 pieces are ordered

o     End of 1997                           15.000 pieces

o     End of 12 months, End of June 1998    50.000 pieces
</TABLE>

If the orders are below the amount of 50.000 pieces at the end of June 1998,
Pretory has to pay the difference between the price for 50.000 Pieces and the
price of the really reached selling amount. If the amount of sold Drugwipes at
the end of 1997 is less than 10.000 pieces, there will be the same conditions as
written in the first sentence.

ESA: Selling-prognose

      If Pretory is selling less than 1.500 packages/Year, the difference value
      to the actual selling price-level has to be payed to Securetec

                                Page 45
                                                                 /s/ [ILLEGIBLE]

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex F (1)

Product-specifications, Demands for transport and stocking

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

1 Drugwipe:

Specifications:
Detectable Analytes:      - Cannabinoides
                          - Opiates
                          - Cocaine
                          - Amphetamines

Fields of Application:    - Identification of controlled drugs
                          - Examination of various kinds of surfaces for the
                            presence of cannabis, cocaine, opiates or
                            amphetamines (search and detection for illegal
                            narcotics)

Analysis time:            1 minute (2 minutes with sampling)

Dimensions:               13 cm x 2 cm x 0,9 cm

Weight:                   11 g

Test principle:           Test stripe based immunochemical detection (biosensor)

Sensitivity:

<TABLE>
<CAPTION>
                    ------------------------------------------------------------
                    Drugwipe type          Analyte               positive result
                    with an                                         amount of
                    ------------------------------------------------------------
                    <S>                 <C>                          <C>
                    ,,Opiates"          Heroin-HCL                   >= 25 ng
                    ------------------------------------------------------------
                    ,,Cocaine"          Cocaine-HCL                  >= 10 ng
                    ------------------------------------------------------------
                    ,,Cannabis"         (delta)9-THC                 >= 25 ng
                    ------------------------------------------------------------
                    ,,Amphetamines"     Methamphetamine-HCL          >= 10 ng
                    ------------------------------------------------------------
</TABLE>

Test procedure:           To check sensitivity an anodized aluminium
                          plate is coated with the respective amounts of
                          analyte. To cover the aluminium plate with the said
                          analyte amounts, aqueous solutions of the respective
                          analyte are applied and dried. The amount of analyte
                          is determined by volume and concentration of the
                          applied analyte solutions. Examination of the
                          respective Drugwipe has to be performed at room
                          temperature (20(degree)C - 25(degree)C) in
                          accordance with the instruction sheet. A positive
                          result is indicated by a red colour developing within
                          one (!) minute in the detection zone. In dependance of
                          the concentration present the colour changes between
                          cream white and red.

                                Page 46

                                                                 /s/ [ILLEGIBLE]

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex F2

Product-specifications, Demands for transport and stocking

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

Storage conditions:

Each Drugwipe kit is packed individually to ensure maximum stability and
performance.
Performance of Drugwipe can only be guaranteed up to the date for
best usage printed on each pack,
- if each Drugwipe kit is stored in the original packaging,
- at a temperature between +15(degree)C and +25(degree)C (between +59(degree)F
  and +77(degree)F)

Transportation:

The temperature during carriage must range below +25(degree)C (+77(degree)F).

This temperature range must not be exceeded for more than +10(degree)C for
longer than 3 days. For storage and transportation each Drugwipe kit must remain
in the original packaging. The approval of not exceeding these conditions shall
be done with a documenting device.

2. ESA-TEST

Specifications:

Detectable Analytes: Opiates and amphetamine; cocaine; LSD and Cannabis.

Field of application: Identification of unknown substances

Test principle: Opiates = Marquis-reagent, Colour changes from white to
                red-violett-blue
                Cocaine = Scott-reagent, Colour changes from white to pale pink,
                then turquoise to bright blue
                LSD = Ehrlich's reagent, Colour change from bright yellow to
                pink-violett
                Cannabis = Fast blue B salt, colour change from whitish grey
                to red

Sensitivity (all are depending on the puritiy of the sample):
                Opiates = 1 mg
                Cocaine = 1 mg
                LSD = 10-20 mg
                Cannabis = 1 mg

Storage life:   Opiates = 1 year at storage temperatures <= 25(degree)C. If
                stocked at temperatures <= 10(degree)C (refridgerator), then the
                storage time will be 2 years
                Cocaine: = 2 years at storage temperature <= 25(degree)C.
                LSD = 2 years at storage temperatures <= 25(degree)C.
                Cannabis = 2 years at storage temperatures <= 25(degree)C.

                                 Page 47

                                                      SECURETEC
                                  [GRAPHIC OMITTED]   Sicherheitstechnologie und
                                                      Gefahrstoffdetektion GmBH

Annex G

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

* In the following, the term "contract" doesn't mean the distribution contract,
just single orders.

                          General Terms and Conditions

1 Validity

1.1 The following Terms and Conditions shall be an integral part of any offer of
SECURETEC and shall apply to all contracts, supplies and services with and by
SECURETEC. The following Terms and Conditions shall apply to all future business
relations between SECURETEC and Customer as well.

1.2 Changes to or exceptions from the Terms and Conditions shall only be
effective if made in writing and signed by the director or a duly authorized
representative of SECURETEC.

1.3 Customer's terms and conditions inconsistent with the terms set forth herein
shall only be valid if confirmed in writing by the director of SECURETEC.

2 Offers

2.1 All offers of SECURETEC shall be without engagement unless confirmed as
binding in writing.

2.2. All indicated prices shall be net prices for export Germany, excluding
value added tax (VAT) of the country which receive the products.

2.3. Other taxes and public charges, including excise taxes, charges for
inspection or examination which might be charged by public authorities of the
country for which the product is delivered, shall therefore not be included in
these prices.

2.4 SECURETEC shall not be obligated to draw Customer's attention to any taxes
and public charges set forth in above paragraph 2.3 All offers submitted by
SECURETEC shall be so construed that Customer shall bear such taxes and public
charges without a special agreement being necessary in this respect.

2.5 The contract shall be concluded by SECURETEC'S written confirmation of
Customer's order or by delivery of the goods according to Customer's order.

3 Passage of Risk, Place of Performance

If the customer organises and pays the transport by himself, all the deliveries
shall be made ex works. The place of performance for all delivery obligations
shall be Riemerling. Shipping of the goods ordered shall be at Customers risk,
i.e. damage and losses suffered and caused by the goods during transport shall
be borne exclusively by Customer.

4 Terms of Delivery

4.1 Unless agreed upon otherwise by the parties, the shipping mode shall be at
SECURETEC's discretion after client's approval of cost and delivery delay.
Securetec shall therefore be free to ship the goods ordered either by plane, or
by railway, ship, or truck. The shipping expenses shall be charged to Customer
at cost price. In this case the shipping of the goods ordered shall be at
SECURETEC'S risk, i.e. damage and losses suffered and caused by the goods during
transport shall be covered by SECURETEC.

4.2 Unless expressly agreed upon otherwise in writing, delays in delivery or the
non-observance of delivery deadlines shall not entitle customer to cancel the
contract or to claim damages.

5 Part Shipments

SECURETEC shall be entitled to fulfil its supply obligation towards Customer by
part shipments, unless such part shipments are not in Customer's interest and
this has been mentioned in the specific command in question.

6 Time Limit for Lodging a Complaint

6.1 Customer shall check immediately all goods received and notify any visible
defect to SECURETEC without any delay, however within 5 days as from receipt of
goods, at the latest. In case the complaint has been received in due time,
SECURETEC shall notify Customer how these goods shall be dealt with. In such an
event, Customer shall store the goods for a reasonable period of time at his own
cost. The reshipping to Securetec will be at Securetecs cost.

6.2 Complaints shall be made in writing and shall specify the defect(s) in a
precise manner.

7 Terms of Payment

7.1 Unless otherwise specified on the invoice, invoices shall fall due and be
payable within 45 days from the date of the invoice without any deduction. This
shall also apply to invoices for part shipments to which SECURETEC is entitled
pursuant hereto, if this way of delivery is specified in the command of the
customer or if the two parties agree to accept part shipments in one command.

7.2 In case of delayed payment, SECURETEC shall be entitled to invoice a penalty
interest on arrears at a rate which is at least 11% per year.

7.3 If SECURETEC is informed about circumstances indicating that payment of the
purchase price may be endangered, it shall be entitled to demand advance
payment. In particular, this shall be the case if Customer is in default of
payment of other due invoices.

7.4 Customer may only setoff against SECURETEC's claims for the payment of the
purchase price if and to the extent that his counterclaim is undisputed or has
become final and absolute.

8 Rescission of Contract by SECURETEC

8.1 SECURETEC shall be entitled to rescind the contract if delivery of the goods
ordered by Customer has become impossible as a result of the fact that
SECURETEC's own suppliers fail to deliver the

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reasonable efforts of SECURETEC.

8.2 SECURETEC shall be entitled to rescind the contract if the execution of its
contractual obligations becomes impossible as a result of circumstances for
which it is not responsible, even if such circumstances fall in SECURETEC's
orbit of influence. This shall apply in particular to Acts of God, strikes,
material shortages, illnesses and other disturbances of SECURETEC's operation,
transport delays etc.

9 Rescission of Contract/Cancellation of Order by Customer

If Customer unilaterally cancels the contract, an order or a part order, he
shall indemnify SECURETEC for all costs incurred as a result of the rescission
of the contract or the cancellation of the order; this shall apply in particular
to all cancellation expenses invoiced to SECURETEC by its suppliers, the cost of
materials which cannot be returned to the supplier as well as all other cost
incurred by SECURETEC for the performance and the cancellation of the order such
as costs for transport, lawyers etc.

10 Delayed performance/delivery

If SECURETEC is in delay more than 60 days, Customer shall be entitled to
rescind the contract and shall be entitled to claim possible penalties for
non-fulfilment of a contract, if Securetec has agreed with such a contract (see
point 5.3, guarantees).

11 Warranty

11.1 SECURETEC warrants that its products correspond to the descriptions
contained in catalogues, technical data sheets or other documents made available
to Customer. But SECURETEC does not guarantee that the supplied products meet
any Customer's expectations extending the contractual purpose and use.

11.2 In any case, Customer's warranty claims for defects of the purchased goods
shall be limited to the right to remedy the defects and the right to substitute
delivery. However, if remedy or substitute delivery fail, Customer shall be
entitled to demand a reduction of purchase price or to rescind the contract.

11.3 The remedy of the defects or the substitute delivery shall be made at
SECURETEC's cost.

12 Warranted Qualities

12.1 Unless expressly agreed upon otherwise, SECURETEC's products may not be
used for other purposes than those mentioned in its documents.

13 Technical Advice

Upon request, SECURETEC advise Customer to its knowledge and within
possibilities on the use of products, however without liability.

14 Retention of Title

14.1 SECURETEC reserves the ownership of all delivered goods until full payment
of purchase price.

14.2 As long as the retention of title remains effective, Customer shall not be
entitled to pledge or to transfer by way of security the ownership of the goods
under retention of title.

14.3 If the goods under retention of title are processed or converted by
Customer, SECURETEC shall be considered as the manufacturer of the final
products resulting from such processing or converting and therefore as their
owner.

14.4 Customer herewith assigns by way of security all claims resulting from the
- justified or unjustified - sale or utilization of the goods under retention of
title to SECURETEC, who accepts. However, Customer shall be entitled to collect
such claims on his own behalf and for SECURETEC's account.

14.5 In case of seizure of the goods under retention of title by third
parties, in particular in case of levy upon property or other compulsory
execution actions concerning Customer's assets, Customer shall point out to
SECURETEC's ownership, inform SECURETEC immediately and provide all documents
required for an intervention. The cost for such intervention shall be borne by
Customer.

15 Proprietary Rights and Rights of Use

15.1 SECURETEC shall not be liable for any violation of national or
international proprietary rights resulting from the sale and use by Customer of
the products delivered by SECURETEC. Therefore, the Customer shall ensure that
resale and use of the product do not violate any third party right. In case of
such a violation, claims for damages against SECURETEC shall be excluded.
Securetec will inform the customer about the measures, which are taken for
protecting the international proprietary rights, especially in the countries for
which the customer have the exclusive selling rights. The customer will inform
Securetec about the suppositions for permission in the country for which the
goods are intended. Every changing of the product name has to be communicated.

15.2 Customer undertakes to indemnify and hold SECURETEC harmless from all
claims for damages raised by third parties on the violation by Customer of any
proprietary rights and rights of use of third parties.

16 Place of Jurisdiction, Choice of Law

The contracts, deliveries and services of SECURETEC are governed by German law.
The place of jurisdiction for all litigations resulting therefrom shall be
Zurich, Switzerland.

                                                          Riemerling, April 1997

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Annex H

Frontline

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Securetec is able to offer Frontline, made by Securetec's partner Bohringer
Mannheim.

Securetec can't give the exclusive selling-rights for Frontline to Pretory,
because Bohringer Mannheim has his own company in France, for example.

Frontline has the following specifications:

      o Detectable analytes are the same as Drugwipe's (annex F).

      o Field of application is the urine-test.

      o Analysis-time is 1-2 minutes.

      o Small stripe, about 10 cm x 0.5 cm, packed in a box with 10 or 30
        stripes.

      o Test principle is the same immunochemical biosensor as Drugwipe

      o Sensitivity: opiates > 200ng/ml; cocaine > 300 ng/ml; cannabis > 5Ong/ml

Prices:
                        Pieces                     Price

                          1.000 Pcs.               DM 8,50
                          5.000 Pcs.               DM 8,00
                         10.000 Pcs.               DM 7,70
                         50.000 Pcs.               DM 7,60
                        100.000 Pcs.               DM 7,40

           (packed in units of ten strips, subdivision not possible)

                                Page 50

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